Chemical Bonding And Molecular Structure Questions

We provide chemical bonding and molecular structure practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on chemical bonding and molecular structure skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.

List of chemical bonding and molecular structure Questions

Question No Questions Class
1 Which of the following is diamagnetic?
A ( cdot H_{2}^{+} )
в. ( O_{2} )
( mathrm{c} cdot mathrm{H}_{2} )
D. ( H_{2}^{-} )
11
2 Which of the following does not show octahedral geometry?
A. ( S F_{6} )
в. ( I F_{5} )
( mathbf{c} cdot operatorname{si} F_{6}^{2} )
D. ( S F_{4} )
11
3 Which of the following statements is
not correct for sigma-and pi- bonds
formed between two carbon atoms?
A. Sigma-bond is stronger than a pi-bond.
B. Bond energies of sigma- and pi-bonds are of the order of ( 264 mathrm{KJ} / mathrm{mol} ) and ( 347 mathrm{KJ} / mathrm{mol} ), respectively.
C. Free rotation of atoms about a sigma bond is allowed but not in case of a pi-bond.
D. Sigma-bond determines the direction between carbon atoms but a pi-bond has no primary effect in this regard.
11
4 Find the number of the
molecule(s)/ion(s) having tetrahedral
geometry from the following.
( O P F_{3}, S_{2} O_{3}^{2-}, X e O_{4}, S F_{4}, T e C l_{4}, N H )
11
5 The percentage of s- character of the hybrid orbitals in ethane, ethene and ethyne are respectively:
A. 50,75,100
В. 10,20,40
( mathbf{c} cdot 25,33,50 )
D. 25,50,75
11
6 Identify the correct increasing order of the stability of the following alkenes,
I.cis-2-butene;
II.trans-2-butene;
III. isobutene:
A. ( I I<I I I<I )
в. ( I<I I I<I I )
c. ( I<I I<I I I )
D. ( I I I<I I<I )
11
7 If true enter 1 , else enter 0
Number of electron pairs in ( boldsymbol{X} boldsymbol{e} boldsymbol{F}_{4} ) at
the corners of the square are four
( A )
11
8 Which of the following is octahedral?
A ( . S F_{6} )
в. ( B F_{4}^{-} )
c. ( P C l_{5} )
D. ( B O_{3}^{3} )
11
9 Q. 59 Assertion (A) Among the two 0-H bonds in H,0 molec
the two 0-H bonds in H.O molecule, the energy
required to break the first 0-H bond and the other 0
same.
hrst 0-H bond and the other 0-H bond is the
” This is because the electronic environment around oxygen is
the same even after breakage of one 0-H bond.
(a) A and R both are correct and R is the correct explanation of A
(b) A and R both are correct, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A and R both are false
bodo in H0H are not
11
10 Predict the geometrical shapes of the following molecules and then predict which molecules you would expect to have resultant dipole moments (also refer to sec-dipole moments):
(a) ( boldsymbol{S O}_{2} )
(b) ( boldsymbol{N} boldsymbol{H}_{mathbf{3}} )
(c) ( boldsymbol{H}_{2} boldsymbol{S} )
( (d) C_{2} H_{4} )
( (e) S F_{6} )
(f) ( C H_{2} C l_{2} )
11
11 Assertion
Dipole moment of ( N H_{3} ) is greater than
that of ( N F_{3} )
Reason
Nitrogen is more electronegative than
fluorine.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
12 Which substance is a polar, molecular
compound?
A. ( B e C l_{2} )
в. ( C H_{2} ) О
c. ( M g F_{2} )
D. ( C_{2} H_{2} )
11
13 Which of the following statements are
correct for ( boldsymbol{H} boldsymbol{C} boldsymbol{N} ) molecule?
This question has multiple correct options
A. Two ( N ) -bonds are perpendicular to each other
B. Lone pair lying in the orbital which is perpendicular to both ( N ) -bonds
C. The dipole moment value is non zero
D. The direction of dipole moment is from ( N ) to ( H ) -atom
11
14 Which of the following commonly forms ionic compounds as a -1 anion?
A. ( C )
в. ( N )
( c cdot O )
D. ( F )
E . ( N e )
11
15 The bond angle and hybridization in ammonia is:
A ( cdot 109^{circ} 5^{prime}, s p^{3} )
В ( cdot 104^{circ} 31^{prime}, s p^{3} )
c. ( 107^{circ}, s p^{3} )
D. none of these
11
16 Relative stabilities of the following
structures of ( boldsymbol{C} boldsymbol{H}_{2}=boldsymbol{C} boldsymbol{H}-boldsymbol{C} boldsymbol{H} boldsymbol{O} ) are
in this decreasing order:
( A cdot|>1>| )
c. ( |mid>|>1 )
D. |>॥|| > ||
11
17 ( K F ) combines with ( H F ) to from ( K H F_{2} )
The compound contains the species:
A ( cdot K^{+}, F^{-} ) and ( H^{+} )
B. ( K^{+}, F^{-} ) and ( H F )
( mathbf{c} cdot K^{+} ) and ( left[H F_{2}right]^{-} )
D. ( [K H F]^{+} ) and ( F_{2} )
11
18 Combination of two Atomic Orbitals
lead to the formation of:
A. two Molecular Orbitals
B. one Molecular Orbitals
c. three Molecular Orbitals
D. four Molecular Orbitals
11
19 White crystalline solid (A) reacts with
( H_{2} ) to form a highly associated liquid
(B) and a monoatomic colorless gas (C). The liquid (B) is used for etching glass. Compound (A) undergoes hydrolysis slowly to form (C), (B) and a diatomic ( operatorname{gas}(D) ) whose IE is almost similar to that of (C). (B) forms an addition
compound with KF to form (E) which is electrolyzed in the molten state to form a most reactive gas (F) which combines
with
(C) in a 1: 1 ratio to produce ( (A) )
The molecule of compound E contains which of the following types of bonds?
A. lonic
B. lonic and Covalent both
c. lonic, covalent and Metallic
D. Ionic, Covalent and H-bonds
11
20 Explain hybridization of central atom in
( : C C l_{4} )
11
21 Select correct statements:
Bond order of:
This question has multiple correct options
( mathbf{A} cdot H e_{2} ) is zero
B. ( H e_{2}^{+} ) is 0.5
( mathbf{c} cdot H e_{2}^{2+} ) is 1.0
D. ( B e_{2} ) is zero
11
22 The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?
A ( cdot O, O_{2}^{2-} ) – Both paramagnetic
B. ( O_{2}^{-}, O_{2}^{2-} ) – Both diamagnetic
C. ( O^{+}, O_{2}^{2-} ) – Both paramagnetic
D. ( O_{2}^{+}, O_{2} ) – Both paramagnetic
11
23 Formation of lonic ( M g C l_{2} ) is
accelerated by:
A. stable octet configuration of ( M g^{+2} )
B. stable octet configuration of ( C l )
c. high lattice enthalpy
D. all of these
11
24 How are electrons involved in the
formation of a covalent compound
11
25 A compound ( X ) consists of only
molecules. Hence ( boldsymbol{X} ) will have :
A. a crystalline hard structure
B. a low melting point and low boiling point
( c . ) an ionic bond
D. a strong force of attraction between its molecules
11
26 Among the following species, the diamagnetic molecule is:
( A cdot O_{2} )
в. ( N O )
c. ( B_{2} )
D. ( C O )
11
27 Define bond length in a molecule. 11
28 Inter-molecular hydrogen bond is not
present in:
A. Ammonia
B. water
c. Hydrofluoric acid
D. Salicylaldehyde
11
29 Which of the following pairs consist of non-ionic compounds?
A. ( K C l ) and ( H C l )
B. ( H C l ) and ( C C l_{4} )
c. ( N a C l ) and ( C a O )
D. ( N a C l ) and ( H_{2} O )
11
30 16g of sulphur completely reacts with
38 g of ( F_{2} ) to form ( S F_{x} . ) The value of ( x ) is:
(Atomic mass of ( boldsymbol{F}=mathbf{1 9} ) )
A .
B. 2
( c cdot 4 )
D. 6
11
31 Which of the following is planar?
A. ( X e O_{4} )
в. ( X e O_{3} F )
c. ( X e O_{2} F_{2} )
D. ( X e F_{4} )
11
32 What is covalency? 11
33 Which of the following family form negative ions in an ionic bond?
A. Alkali metalss
B. Alkaline earth metals
c. Noble gases
D. Halogens
E. Transition metals
11
34 Compare ( x ) and ( y ) bond length in above molecules? ( boldsymbol{y}=mathbf{2 . 6 4 4} dot{boldsymbol{A}} quad boldsymbol{x}=mathbf{2 . 2 1} dot{boldsymbol{A}} )
( A cdot x>y )
B. y > x
( c cdot x=y )
D. None of these
11
35 The bent-shape of the molecule may
develop from which of the following hybridization(s)? This question has multiple correct options
( A cdot s p^{3} d )
B ( cdot s p^{3} )
( c cdot s p )
( D cdot s p^{2} )
11
36 The electronegativity of ( C s ) is 0.7 and that of ( F ) is 4.0 The formed between the
two is ?
A. Covalent
B. Electrovalent
c. coordinate
D. Metallic
11
37 Which of the following molecule will be most polar?
A .1,3,5 trichloro benzene
B. Trans 1,2- dichloro ethene
c. Cls- -1-fluoro propene
D. Trans 1 fluoro propene
11
38 Which of the following molecules has two sigma ( (sigma) ) and two pi ( (pi) ) bonds?
A. ( C_{2} H_{4} )
в. ( N_{2} F_{2} )
c. ( C_{2} H_{2} C l_{2} )
D. ( H C N )
11
39 Phosphorous can form two types of halides whereas nitrogen can form only one type of halide. Give reason(s). 11
40 An element L consists of molecules:
What type of bonding is present in the particles that make up L?
11
41 Write down the Born-Land equation and define the terms in it. Use the equation to show why some crystalsm which according to the radius ratio concept should adopt a coordination number of
( 8, ) in fact have a coordination number of
6
11
42 If an atom loses an electron, it forms a
A. cation
B. anion
c. it remains neutral
D. none of the above
11
43 Which from the given options is not correctly matched?
A . ( X e O_{3} ) -Trigonal bipyramidal
B . ( C l F_{3}- ) bent T-shape
c. ( X e O F_{4} ) -Square pyramidal
D. ( X e F_{2} ) -Linear shape
11
44 Bond energy of covalent ( boldsymbol{O}-boldsymbol{H} ) bond in
water is:
A. greater than bond energy of hydrogen bond
B. equal to bond energy of hydrogen bond
c. less than bond energy of hydrogen bond
D. half of the bond energy of hydrogen bond
11
45 The correct order of increasing bond length of ( mathrm{C}-mathrm{H}, mathrm{C}-mathrm{O}, mathrm{C}-mathrm{C} ) and ( mathrm{C}=mathrm{C} ) is :
A. C-H<C-O<C-C<C=C
B. C-H<C=C<C-O<C-C
c. ( c-c<c=c<c-0<c-H )
D. C-O<C-H<C-C<C=C
11
46 The strength of bonds by ( 2 s-2 s, 2 p- )
( 2 p, 2 s-2 p, 1 s-1 s ) overlap has the
order:
A. ( 1 s-1 s>2 s-2 s>2 s-2 p>2 p-2 p )
В. ( 2 p-2 p>2 s-2 p>2 s-2 s>1 s-1 s )
c. ( 2 s-2 s>1 s-1 s>2 s-2 p>2 p-2 p )
D. ( 2 s-2 p>2 s-2 s>2 p-2 p>1 s-1 s )
11
47 Hydrogen bond are present in:
This question has multiple correct options
( A cdot ) ice
B. water
C . solid carbon dioxide
D. ( H F )
11
48 Consider the following three halides:
(i) ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C l} )
(ii) ( boldsymbol{C H}_{2}=boldsymbol{C H}-boldsymbol{C l} )
(iii) ( C_{6} H_{5}-C l )
Arrange C-Cl bond length of these compounds in decreasing order.
A. i > ii > ii i
c. iii > ii > i
D. ii > iii >
11
49 Predict hybridization and shape of ( boldsymbol{S} boldsymbol{F}_{4} )
molecule.
A ( cdot s p^{3} d ) and see saw
B . sp ( ^{3} ) and tetrahedral
c. sp and T-shape
D. ( s p^{3} d^{2} ) and octahedral
11
50 Which of the following is a measurement of water pollution?
A. ( P C S )
в. ( P C B )
( c . B O D )
D. ( C O D )
11
51 Q1. What is an electrovalent (or ionic) bond? Explain its formation with two examples. 11
52 Which one among the following is not
correct as per indicated property?
( mathbf{A} cdot B r_{2}<C l_{2}<F_{2}(text { Oxidising power }) )
B. ( B r_{2}<F_{2}<C l_{2} ) (Electron gain enthalpy)
( mathbf{c} cdot B r_{2}<C l_{2}<F_{2}(text { Electronegativity }) )
( mathbf{D} cdot B r_{2}<C l_{2}<F_{2}(text { Bond energy }) )
11
53 In which of the following molecule, all the atoms lie in same plane? This question has multiple correct options
A. ( X e F_{4} )
в. ( B F_{3} )
c. ( P F_{5} )
D. ( N H_{3} )
11
54 Which of the following statement is
incorrect for ( C O ) molecule?
A. Intramolecular Lewis acid – base interaction is present
B. Charge separation is present
C. ( sigma ) – bond, ( pi ) – bond and back – bond all are present together
D. Direction of dipole moment is from ( C ) to ( O )
11
55 Using VBT theory describe shape of
( boldsymbol{X} boldsymbol{e} boldsymbol{O}_{4} )
11
56 Q. 26 Which of the following species have the same shape?
(a) CO2
(b) CCI
(c) O3
(d) NO2
T
11
57 Compared to other acids like ( boldsymbol{H} boldsymbol{C l} )
( boldsymbol{H} boldsymbol{N} boldsymbol{O}_{3}, boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4} ) is highly syrupy and
viscous in nature. Identify the correct
reason
A ( cdot H_{2} S O_{4} ) is highly concentrated
B. ( H_{2} S O_{4} ) is a stronger acid than ( H C l, H N O_{3} )
( mathrm{c} cdot mathrm{H}_{2} mathrm{SO}_{4} ) is associated by more number of hydrogen bonds
D. Both ( A ) and ( B ).
11
58 The effect of repulsion between the two lone pairs of electrons present on oxygen in water molecule is a:
A. no change in ( H-O-H ) bond angle
B. decrease in ( H-O-H ) bond angle
c. increase in ( H–O-H ) bond angle
D. all atoms will be in one plane
11
59 Explain the formation of a double bond
in oxygen molecule
11
60 Pentane has the molecular formula
( C_{5} H_{12} . ) It has:
A. 10 covalent bonds
B. 12 covalent bonds
c. 16 covalent bonds
D. 17 covalent bonds
11
61 Based on VSEPR theory predict the
geometry and shape of :
a) ( C l F_{3} )
b) ( boldsymbol{N} boldsymbol{H}_{4}^{+} )
Draw the figure also.
11
62 Out of list 1 , select the cation which has
less polarizing power than ( C a^{2+} ) and from list II, select the anion having more polarisability:
List ( mathrm{I}: M g^{2+}, S c^{3+}, K^{+} )
List II: ( boldsymbol{O}^{2-}, boldsymbol{C l}^{-}, boldsymbol{P}^{3-} )
( mathbf{A} cdot M g^{2+}, O^{2+} )
B. ( K^{+}, P^{3-} )
( mathbf{c} cdot S c^{3+}, P^{3-} )
D. ( M g^{2+}, C l^{-} )
11
63 Which of the following organic compounds has same hybridization as
its combustion product, ( C O_{2} ? )
A. Ethane
B. Ethyne
c. Ethene
D. Ethanol
11
64 Which has the smallest size?
A . ( N a^{+} )
в. ( M g^{2+} )
c. ( A l^{3} )
D. ( P^{5} )
11
65 Q31. What do you understand by bond pairs and lone pairs of electrons? Illustrate by giving one
example of each type.
Ans Tho alectron noin inul
11
66 The correct order of boiling point is:
( mathbf{A} cdot H F>H I>H B r>H C l )
B ( . H F>H B r>H I>H C l )
( mathbf{c} . H C l>H B r>H I>H F )
D. ( H C l>H I>H B r>H F )
11
67 The formal charge on the 0 atoms in the ion ( [: ddot{O}=N=ddot{O}:]^{+} ) is:
A . -2
B. – 1
c. 0
D. +1
11
68 In the electronic structure of ( mathrm{H}_{2} mathrm{SO}_{4} ), the
total number of shared electrons is:
A . 20
B . 16
c. 12
D. 8
11
69 Of the four structures displayed, which
does out fit the octet-rule description of the electron-dot model developed by G.N. Lewis?
[
0=mathbf{H}
]
orbital
80
A . I
в. ॥
c.
D. (All four fit the Lewis model.)
11
70 Which of the following system has maximum number of unpaired electrons?
A ( cdot d^{4} ) (Octahedral,Low spin)
B . ( d^{6} ) (tetrahedral)
c. ( d^{6} ) (octahedral, low spin)
D. ( d^{9} ) (Octahedral)
11
71 Define hydrogen bond. Is it weaker or stronger than the Van der Waals forces? 11
72 The formal charge of the ( O ) atoms in the
ion is:
[
[because 0=N=0:]^{+}
]
A . -2
B. –
( c )
D. +1
11
73 The ice floats on water because:
A. solids have lesser density than liquids
B. it has open-cage like structure in which lesser molecules are packed per mL than water
C . ice is lighter than water
D. when ice is formed water molecules come closer and start floating.
11
74 State whether the statement is true or
false:

Lewis dot symbols indicate the number of electrons of the inner shell.

11
75 Which of the following orders is not
correct with respect to the property indicated against each?
( mathbf{A} cdot F>C l>B r>I rightarrow ) electron gain enthalpy
B ( cdot F^{-}>C l^{-}>B r>I^{-} rightarrow ) enthalpy of hydration
( mathbf{C} cdot F_{2}>C l_{2}>B r_{2}>I_{2} rightarrow ) bond dissociation energy
( mathbf{D} cdot F_{2}<C I_{2}<B r_{2}<I_{2} rightarrow X-X ) bond lenght
11
76 The hybridization of sulphur in peroxodisulphuric acid is:
( A cdot s p^{2} )
В ( cdot s p^{3} )
c. ( s p )
D. ( s p^{3} d )
11
77 Q.42 What is an ionic bond? With two suitable examples the difference
between an ionic and a covalent bond?
An
11
78 Among the following the most basic compound is :
A. p-nitroaniline
B. acetanilide
c. aniline
D. benzylamine
11
79 Atoms of eight elements ( A, B, C, D, E, F ) G and H have the same number of
electronic shells but different number
of electrons in their outermost shell. It
was found that elements ( A ) and ( G ) combine to form an ionic compound which can also be extracted from sea
water. This compound is added in a small amount to almost all vegetable dishes during cooking. Oxides of elements A and B are basic in nature
while those of ( mathrm{E} ) and ( mathrm{F} ) are acidic. The
oxide of ( mathrm{D} ) is almost neutral. Based on
the above information answer the
following question.
What would be the nature of compound formed by a combination of elements B
and F?
11
80 Which of the following is not a property of covalent compounds?
A. Low boiling points
B. Solids are brittle and variously colored
c. Poor conductors of heat and electricity
D. Superior malleability
11
81 The paramagnetic moment ( boldsymbol{O}_{2}^{-} ) is:
A. 1.732
B. 3
c. 1.5
D. 2.5
11
82 Hlgher is the bond order, greater is:
A. bond dissociation energy
B. covalent charcter
c. bond length
D. paramagnetism
11
83 The bond present in ( C H_{4} ) is :
A . covalent
B. ionic
c. hydrogen
D. Van der Waals
11
84 Q15. State the types of hybrid orbitals associated with (i) P in PCl, and (ii) S in SF 11
85 How many nodal plane is/are present in
( sigma_{p-p} ) bonding molecular orbital?
11
86 The compound with more covalent character is :
A. ( operatorname{SnCl}_{2} )
в. ( operatorname{Sn} C l_{4} )
( mathbf{c} cdot P b C l_{2} )
( mathbf{D} cdot P b C l_{4} )
11
87 Identify the hybridisation of underline ( operatorname{atom} operatorname{in} boldsymbol{H}_{3} boldsymbol{O}^{+} )
( mathbf{A} cdot s p )
B . ( s p^{2} )
( c cdot s p^{3} )
D. ( d^{2} s p^{3} )
11
88 Potassium hexachloroplatinate
( boldsymbol{K}_{2}left[boldsymbol{P}_{2} boldsymbol{i} boldsymbol{C l}_{3}right] ) adopts anti-fluorite crystal
structure. Which of the following ions adopts ( f c c ) arrangement?
A ( cdot C l^{-} ) ions
B. ( K^{+} ) ions
( mathbf{c} cdot P t^{4+} ) ions
D. ( left[P t C l_{6}right]^{2-} ) ions
11
89 A sigma bond may be formed by the
overlap of 2 atomic orbitals of atoms ( boldsymbol{A} )
and ( B ). If the bond is formed along the
( x- ) axis, which of the following overlaps
is acceptable?
( mathbf{A} cdot s ) orbital of ( A ) and ( p_{z} ) orbital of ( B )
B. ( p_{x} ) orbital of ( A ) and ( p_{y} ) orbital of ( B )
C . ( p_{z} ) orbital of ( A ) and ( p_{x} ) orbital of ( B )
D. ( p_{x} ) orbital of ( A ) and ( s ) orbital of ( B )
11
90 Sodium forms ( N a^{+} ) ion but it doesnot
form ( N a^{2+} ) because of
A. very low value of first and second 1.
B. very high value of first and second 1.
c. high value of first l.E and low value of second l.E
D. low value of first l.E and high value of second l.
11
91 Which of the following has a non zero dipole moment?
A. ( P C l_{5} )
в. ( C l F_{3} )
c. ( X e F_{4} )
D. ( C_{2} H_{5} C equiv C C_{2} H_{5} )
11
92 The heat of formation of ( C O_{2} ) is
( -96 k c a l . ) The amount of carbon which
on burning will evolve 1000 kcal is:
A . 12.63 g
в. 17.95 g
( c cdot 126.38 )
D. 179.5 ( g )
11
93 The bond orders of ( O_{2}^{2-}, O_{2}^{-}, O_{2} ) are
respectively ( x, y ) and ( z )
Then what is the value of ( 2(x+y+z) ? )
11
94 7. The bond energy depends upon
(a) size of the atom
(c) bond length
(b) electronegativity
(d) all of the above
o
action
11
95 Predict the structure of the following and indicate whether the bond angles are likely to be dissorted from the
theoretical values:
( boldsymbol{I} boldsymbol{F}_{5} )
11
96 Which of the following are paramagnetic? This question has multiple correct options
( A cdot B_{2} )
в. ( O_{2} )
( c cdot N_{2} )
D. ( H e_{2} )
11
97 Which of the following statements is
not correct from the view point of
molecular orbital theory?
( mathbf{A} cdot B e_{2} ) is not a stable molecule.
B. ( H e_{2} ) is not stable but ( H e_{2}^{+} ) is expected to exist.
C. Bond strength of ( N_{2} ) is maximum amongst the homonuclear diatomic molecules belonging to the second period.
D. The order of energies of molecular orbitals in ( N_{2} ) molecule is ( sigma 2 s<sigma * 2 s<sigma 2 p_{z}<left(pi 2 p_{x}=pi 2 p_{y}right)< )
( left(pi * 2 p_{x}=pi 2 p_{y}right)<sigma * 2 p_{z} )
11
98 Assertion
The ( N-N ) bond distance in ( N ) is
shorter than the ( N-N ) bond distance
in ( boldsymbol{N}_{2} boldsymbol{H}_{4} )
Reason
The atomic radius of ( boldsymbol{H} ) is smaller than
the atomic radius of ( N )
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
99 How many of the following species have the trigonal planar shape,
( N I_{3}, I_{3}^{-}, S O_{3}^{2-}, N O_{3}^{-} ? )
11
100 Which statements are correct for CO
and ( N_{2} ) according to molecular orbital theory?
(I) Bond order of ( mathrm{CO} ) and ( N_{2} ) are 3 and 3
(II) Bond order of ( mathrm{CO} ) and ( N_{2} ) are same
(III) During the formation of ( N_{2}^{+} ) from
( N_{2} ) bond length increases
(IV) During the formation of ( C O^{+} ) from
CO, the bond length decreases.
( mathbf{A} cdot |, 1 vee, )
в. ।, и, II, Iv
( c cdot ) ।, ॥
D. ।, и, II
11
101 Q.5 In PO2 ion the formal charge on the oxygen atom of P-0 bond is
(a) + 1
(b)-1
(0) – 0.75
(d) +0.75
3
11
102 Two molecules indicated below are
capable to intramolecular H-bonding. Which is likely to form more stable
hydrogen bonds?
( A )
B. II
C. Both are equally capable
D. Cannot be predicted
11
103 ( C(text { diamond }) rightarrow C(text { graphite }), Delta S_{300}= )
( mathbf{1 0} ) cal ( boldsymbol{m o l}^{-1} )
( boldsymbol{C}(text { diamond })+boldsymbol{O}_{2} rightarrow boldsymbol{C} boldsymbol{O}_{2} ; boldsymbol{Delta} boldsymbol{H}=-mathbf{9 1} )
kcal ( m o l^{-1} ) at ( 300 K )
( boldsymbol{C}(text { graphite })+boldsymbol{O}_{2} rightarrow boldsymbol{C} boldsymbol{O}_{2} ; boldsymbol{Delta} boldsymbol{H}=boldsymbol{x} ) at
( mathbf{3 0 0 K} )
( x ) is:
A. -81 kcal
B. 101 kcal
c. -94 kcal
D. 88 kcal
11
104 The force of attraction that holds the
hydrogen atom of one molecule to the strongly electronegative atom of adjacent molecule is called:
A. electrostatic force of attracton
B. vanderwaal’s forces
c. hydrogen bonding
D. None of these
11
105 Calculate the formal charge on ( C l ) atom
in ( boldsymbol{H} boldsymbol{C l} boldsymbol{O}_{4} )
11
106 Number of Sugden’s singlet bonds in
( boldsymbol{P C l}_{5} ) is :
11
107 me above molecule.
9 Which molecule/ion out of the following does not contain unpaired
electrons?
(a) N7
(b) ,
(d) B2
(c) o
11
108 8. 46 Group the following as linear and non-linear molecules.
H,O, HOCI, BeCl2, C1,0
11
109 The hybridization of carbon atoms in
( C-C ) single bond of ( H C equiv C- )
( boldsymbol{C H}=boldsymbol{C H}_{2} ) is:
A ( cdot s p^{3}-s p^{3} )
В ( cdot s p^{2}-s p^{3} )
( mathbf{c} cdot s p-s p 2 )
D. ( s p^{3}-s p )
11
110 Dipole moment of chlorobenzene is
lower than that of cyclohexyl chloride.
Give reason:
11
111 Assertion
The ( p- ) isomer of dichlorobenzene has
higher melting point than o – and ( m- ) isomer
Reason
( p- ) isomer is symmetrical and thus shows more closely packed structure
A. Assertion is true, Reason is true and Reason is correct explanation for Assertion
B. Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion
c. Assertion is true, Reason is false
D. Assertion is false, Reason is true
11
112 Which of the following is the most
stable state when two atoms come
closer to each other to form a molecule?
A. When the bond is formed, the energy is minimum
B. When the atoms touch each other, the energy is zero
C. When the atoms are isolated, the energy is minimum
D. None of these
11
113 Explain hybridization of central atom in
( : boldsymbol{C H}_{mathbf{4}} )
11
114 The number of valence electrons and
the valency with respect to hydrogen are equal for:
A. Sulphur
B. Silicon
c. Phosphorus
D. Chlorine
11
115 When ( 20 m l ) of ethanol is mixed with
10 ( m l ) of water, the total volume of the
solution will be:
A. ( 30 m l )
в. ( >30 m l )
( c cdot<30 m l )
D. not definite
11
116 A chemical bond between two atoms is:
A. The tunnel in an atom through which the other one can pass
B. The energy of the individual atoms
c. The link between them
D. A third, connecting atom
11
117 Fill in the blanks:
( N a C l ) an electrovalent compounds is formed as a result of tranfer of
[one,two, three] valence electrons from metallic sodium to non-metallic
chlorine atom. ( C a O ) is similarly formed
as a result of transfer of [one,
two, three] valence electrons from
metallic calcium to non-metallic
oxygen and magnesium chloride by transfer of ( _{—-} ) [one, two, three] valence electrons from ( _{—} ) [one, two] magnesium atom/s to [one, two]
chlorine atom/s.
11
118 1. A co-ordinate bond is formed by:
(a) sharing of electrons contributed by both the atoms
(b) complete transfer of electrons
(c) sharing of electrons contributed by one atom only
(d) none of these
11
119 The correct statement with regard to
( boldsymbol{H}_{2}^{+} ) and ( boldsymbol{H}_{2}^{-} ) is:
( mathbf{A} cdot ) both ( H_{2}^{+} ) and ( H_{2}^{-} ) are equally stable
B. both ( H_{2}^{+} ) and ( H_{2}^{-} ) do not exist
( mathbf{C} cdot H_{2}^{-} ) is more stable than ( H_{2}^{+} )
D. ( H_{2}^{+} ) is more stable than ( H_{2}^{-} )
11
120 In ( I C l_{4}^{ominus} ) the shape is square planar. The number of bond pair-lone pair repulsion
at ( 90^{circ} ) are:
A. 6
B. 8
c. 12
D. 4
11
121 The hybridization associated with the central atom of a molecule in which all
the bond angles are ( 120^{circ} ) is
( mathbf{A} cdot s p )
в. ( S p^{2} )
( c cdot s p^{3} )
D. ( s p^{3} d )
E ( cdot s p^{3} d^{2} )
11
122 Two elements ( P(text { at.wt. } 39) ) and ( Q ) (at.wt
80) contain 20 and 45 neutrons
respectively in their nucleus:
What type of bonds are ( boldsymbol{P}-boldsymbol{Q} ) and ( boldsymbol{Q}- )
( Q ? )
A. ( P-Q ) bond is Covalent and ( Q-Q ) bond is covalent.
B. ( P-Q ) bond is ionic and ( Q-Q ) bond is covalent
c. ( P-Q ) bond is Covalent and ( Q-Q ) bond is metallic.
D. ( P-Q ) bond is ionic and ( Q-Q ) bond does not form.
11
123 Which of the following set of species do
not have planar structure?
A ( cdot I_{3}^{-}, C H_{3}, C l O_{3}^{-}, S i F_{6}^{2}- )
B . ( I_{3}^{+}, I C l_{4}^{-}, A l_{2} C l_{6} . T e C l_{4} )
c. ( S C l_{2}^{-}, N_{2} O_{5}, S F_{4}, X e O F_{4} )
D. ( I_{2} C l_{6}, X e F_{2}, B r F_{4}^{-}, X e F_{5}^{-} )
11
124 Write down the Lewis formula or
electron dot formula of the following
compounds.
( boldsymbol{S} boldsymbol{i} boldsymbol{C l}_{4} )
11
125 Define hydrogen bond. Explain different types of hydrogen bond giving examples. 11
126 ( I_{3}^{+} ) and ( I_{3}^{-} ) have same :
A. geometry
B. no .of lone pair(s)
c. bond angle
D. none of these
11
127 Among ( K O_{2}, A l O_{2}^{-}, B a O_{2} a n d N O_{2}^{+} )
unpaired electron is present in:
A. ( N O_{2}^{+} ) and ( B a O_{2} )
B. ( K O_{2} ) and ( A l O_{2}^{-} )
c. ( K O_{2} ) only
D. ( B a O_{2} ) only
11
128 Which molecular geometry is least likely to result from a trigonal bipyramidal electron geometry?
A. Trignoal planer
B. See-saw
c. Linear
D. T-shaped
11
129 Q5. Define Octet rule. Write its significance and limitations. 11
130 Based upon M.O. theory state reason for the paramagnetic characater of ( boldsymbol{C} boldsymbol{N} )
the diamagnetic character of ( C N ), the
stability of ( C N ) and calculate their respective bond orders.
A ( cdot_{2} frac{1}{2}, 2 )
в. ( _{2 frac{1}{2}, 3} )
c. ( _{1 frac{1}{2}, 3} )
D. ( _{1} frac{1}{2}, 2 )
11
131 Which of the following number of lone
pair at central atom zero?
( X e O_{3}, X e O_{2} F_{2}, X e O_{4}, X e O_{3} F_{2}, B a_{2} X )
A . 2
B. 3
( c cdot 4 )
D. zero
11
132 ( N O ) is free radical. What is the number
of unpaired electrons?
11
133 Which of the following exhibit minimum number of oxidation states:
A. Mn
B. Np
c. Th
D. cr
11
134 Which of the following compounds contain(s) no covalent bonds?
( boldsymbol{K} boldsymbol{C l}, boldsymbol{P H}_{3}, boldsymbol{O}_{2}, boldsymbol{B}_{2} boldsymbol{H}_{6}, boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4} )
A. ( K C l )
в. ( K C l, B_{2} H_{6} )
c. ( K C l, B_{2} H_{6}, P H_{3} )
D. ( K C l, H_{2} S O_{4} )
11
135 Which of the following is not the
consequence of ( boldsymbol{H} ) -bonding?
A. Glycerol is more soluble in water than ethanol
B. Boiling point of ( C_{2} H_{5} O H ) is higher than ( C H_{3}-O- )
( C H_{3} )
C. p-nitrophenol has higher boiling point than onitrophenol
D. ( H C l ) is water soluble due to ( H ) -bonding.
11
136 The bond order depends on the number of electrons in the bonding and non bonding orbitals. Which of the following statements is /are correct about bond
order?
A. Bond order cannot have a negative value.
B. It always has an integral value
c. It is a nonzero quantity.
D. It can assume any value-positive or negative, integral or fractional, including zero.
11
137 Which is the best description of a
covalent bond?
A. Electrons are simultaneously attracted by more than one nucleus.
B. Filled orbitals of two or more atoms overlap one another.
C. Unoccupied orbitals of two or more atoms overlap one another.
D. Oppositely charged ions attract one another.
11
138 rons.
Q. 28 Diamagnetic species are those which contain no unpaired
Which among the following are diamagnetic?
(a) N,
(b) N
(c) O
(d) O
Ans
11
139 Assertion
Super oxide ion is paramagnetic whereas peroxide ion is diamagnetic.
Reason
Super oxide ion has one unpaired electron whereas per oxide ion has no unpaired electron.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
140 The shape of ( S C l_{4} ) is best described as
( a: )
A. square
B. tetrahedron
c. square pyramid
D. see-saw
11
141 Q1.
(a) Explain the formation of ionic bond with two examples.
(b) Discuss the conditions which favour the formation of ionic bond.
11
142 Draw the Lewis dot structure of the
following.
( boldsymbol{C O}_{3}^{2-}, boldsymbol{H C l O}_{4}, boldsymbol{H} boldsymbol{N O}_{3} )
11
143 Which of the following having a square planar structure is:
( mathbf{A} cdot N H_{4}^{+} )
в. ( B F_{4} )
c. ( x e F_{4} )
D. ( C C l_{4} )
11
144 What is the formal charge on carbon
atom in the following two structures?
A .0,-2
В. 0,0
( c cdot+2,-2 )
( mathbf{D} cdot+1,- )
11
145 An element ( X ) combines with oxygen to
form an oxide ( X_{2} O . ) To which group of
the periodic table does the element ( boldsymbol{X} )
belong?
A. group 1
B. group 3
c. group 5
D. group 7
11
146 8.8
8.8
8.8
11
147 lonisation energies(IE) and electron affinities (EA) of F and Cl are given below: Compound formed between F and Cl is predominantly:
Element ( quad ) IE ( quad ) EA
( F )
( 17.4 mathrm{eV} quad 3.45 mathrm{eV} )
( mathrm{c} )
( 13.0 mathrm{eV} quad 3.61 mathrm{eV} )
A ( cdot F^{+} C l^{-} )
B. ( C l^{+} F^{-} )
c. F-cl
D.
11
148 u
on my DC Isurueu single
Q9. Define bond order. How is it related to the stability of a molecule?
11
149 The lattice energies of ( boldsymbol{K} boldsymbol{F}, boldsymbol{K} boldsymbol{C l}, boldsymbol{K} boldsymbol{B r} )
and ( K I ) follows the order:
A. ( K F>K C l>K B r>K I )
B. ( K I>K B r>K C L>K F )
c. ( K F>K C l>K I>B r )
D. ( K I>K B r>K F>K C l )
11
150 Write any two uses and two properties
of covalent compounds.
11
151 The maximum number of hydrogen
bonds that can be formed by a water
molecule are:
11
152 Atoms combine to form:
A. large atoms
B. molecules
c. mixtures
D. none of the above
11
153 Which of the following has ( s p^{2} )
hydridization?
( A cdot S O_{2} )
в. ( H_{2} ) о
c. ( N H_{3} )
( mathrm{D} cdot mathrm{SO}_{3}^{2-} )
11
154 The largest possible bond angle is observed in:
A. ( B F_{3} )
в. ( B e F_{2} )
c. ( N F_{3} )
D. ( C F_{4} )
11
155 During the formation of ( N a C l, ) which of
the enthalpies are negative?
A. Lattice enthalpy
B. Electron affinity
c. Both ( A ) and ( B )
D. None of these
11
156 Which of the following have dipole
moment?

This question has multiple correct options
A. nitrobenzene
B. p-chloronitrobenzene
c. m-dichlorobenzene
D. o-dichlorobenzene

11
157 Among the following bonds formed by the chlorine atom, the strongest bond is formed with which of the following elements?
A. lodine
B. Hydrogen
c. carbon
D. Chlorine
11
158 Which one of the following does not
follow octet rule?
A ( . P F_{3} )
в. ( B F_{3} )
( c cdot C O_{2} )
D. ( C C l_{4} )
11
159 Which of the following molecule is
paramagnetic?
A. Chlorine
B. Nitrogen
c. oxygen
D. Hydrogen
11
160 The hybridization of carbon atoms in ( C ) –
C single bond of ( boldsymbol{H} boldsymbol{C} equiv boldsymbol{C}-boldsymbol{C H}=boldsymbol{C H}_{2} )
is :
B. ( s p^{2}-s p^{3} )
( mathbf{c} cdot s p-s p^{2} )
D. ( s p^{3}-s p )
11
161 Increasing strength of H-bonding ( (boldsymbol{X}- )
( –boldsymbol{H}-boldsymbol{X}) ) in ( boldsymbol{S}, boldsymbol{O}, boldsymbol{F}, boldsymbol{C l}, boldsymbol{N} ) is:
A. ( C l<S<N<O<F )
в. ( N<C l<S<O<F )
c. ( S<C l<N<O<F )
D. ( S<N<C l<O<F )
11
162 Which of the following compounds show hydrogen bonding?
A. ( H C l )
в. ( C_{2} H_{6} )
c. ( R C H_{2} C H O )
D. ( R C H_{2} N H C H_{3} )
11
163 Formal charge on sulphur in ( S O_{2} ) is: 11
164 Consider the above Lewis Dot structure:
The formal charges on ( S ) and ( O ) are
respectively:
A .0,0
в. +2,0
( c cdot 0,-2 )
( mathrm{D} cdot+1,- )
11
165 The electronic structure of ( boldsymbol{S O}_{2} )
molecule is best represented as a resonance hybrid of how many resonating structures?
( A cdot 2 )
B. 3
( c cdot 4 )
( D cdot 5 )
11
166 Q. 36 Explain why PCV, is trigonal bipyramidal whereas IF, is square pyramidal.
a
TL
11
167 The ion which is not tetrahedral in
shape is:
A. ( B F_{4}^{-} )
B. ( N H_{4}^{+} )
( mathbf{c} cdot X e O_{4} )
D. ( I C l_{4} )
11
168 Identify the compound having hydrogen bonding.
A. water
B. Chlorine gas
c. oxygen gas
D. Neon
11
169 The shape of ( X e O_{2} F_{2} ) molecule is:
A. trigonal bipyramidal
B. square planar
c. tetrahedral
D. see-saw
11
170 Explain the postulates of Molecular Orbital Theory. 11
171 Which of the following is not a covalent nitride?
( A cdot B N )
в. Аl N
( mathrm{c} cdot mathrm{Ge}_{3} N_{4} )
D. ( S c N )
11
172 The type of bond formed between ( boldsymbol{H}^{+} )
and ( N H_{3} ) in ( N H_{4}^{+} )
A. covalent
B. ionic
c. dative
D. hydrogen
11
173 Q. 14 Stable form of A may be represented by the formula
(a) A
(b) Az
(c) Az
(d) A4
11
174 Number of lone pairs around
phosphorus in ( boldsymbol{P} boldsymbol{C l}_{5}, boldsymbol{P C l}_{4}^{+} ) and ( boldsymbol{P C l}_{6}^{-} )
are respectively
A. 0,1,2
B. 0,0,0
c. 1,2,3
( mathbf{D} cdot 0,2,1 )
11
175 A sigma bond forms:
A. when two orbitals directly overlap but there is only one bonding interaction.
B. when two orbitals directly overlap and there are two bonding interaction.
C. when two valence electrons combine into one orbital.
D. when two atoms overlap and the valence electrons bond
E. the creation of an S shaped orbital.
11
176 Q. 68 In which of the following molecules, 620, molecular orbital is filled
after 12px and t2p, molecular orbitals?
(a) O₂
(b) Nez
(c) N₂
(d) F2
11
177 Statement 1: Substances with hydrogen
bonding tend to have unusually low boiling points. Statement 2: Extra energy is necessary to break the hydrogen bonds.
A. Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1
B. Both the Statement 1 and Statement 2 are correct, but Statement 2 is not the correct explanation of Statement 1.
c. statement 1 is correct, but statement 2 is not correct
D. Statement 1 is not correct, but Statement 2 is correct
11
178 Number of pi bonds in ( X e O_{4} ) is: 11
179 A solid compound “A” consists of simple ions. Nature of the bond present in A will be:
A . ionic
B. covalent
c. molecular
D. hydrogen bond
11
180 Which of the following is not a linear molecule?
A. ( C O_{2} )
в. ( C_{2} H_{2} )
c. ( H C N )
D. ( H_{2} O )
11
181 What are the conditions for a species to
( operatorname{act} operatorname{as} a operatorname{donor} ) and an acceptor during
dative bond formation?
A. donor: Must possess higher ionization potential, big size and less charge on cations.
B. acceptor: Possess more electron affinity, less size and less negative charge on anions.
( mathbf{C} . ) Both ( A ) and ( mathbf{B} )
D. donor: Must possess less ionization potential, big size and less charge on cations. acceptor: Possess more electron affinity, less size and less negative charge on anions.
11
182 How many nodal plane is/are present in
( sigma_{s-s}^{*} ) anti-bonding molecular orbital?
11
183 Select the correct order of polarity of the
bond for the following molecules:
( mathbf{A} cdot N H_{3}<S b H_{3}<A s H_{3}<P H_{3} )
B. ( N H_{3}<P H_{3}<S b H_{3}<A s H_{3} )
( mathbf{c} cdot N H_{3}<P H_{3}<A s H_{3}S b H_{3}>A s H_{3}>P H_{3} )
11
184 The octet rule is not followed by:
A. ( F_{2} )
в. NaF
c. ( C a F_{2} )
D. ( B F_{3} )
11
185 Draw MO energy level diagrams for
( C_{2}, O_{2} ) and ( C O . ) Show which orbitals are
occupied, and work out the bond orders and magnetic properties of these molecules.
11
186 Which of the following has the maximum value of dipole moment?
( A )
в.
c.
D.
11
187 Which molecule contains both polar
and non-polar covalent bond?
( mathbf{A} cdot N H_{4}^{+} )
в. НС l
( mathrm{c} cdot mathrm{CH}_{4} )
D. ( H_{2} O_{2} )
11
188 During the change of ( O_{2} ) to ( O_{2}^{-} ) ion, the electron adds on which one of the
following orbitals?
( A cdot pi ) orbital
B ( cdot sigma^{*} ) orbital
c. ( sigma ) orbital
D・ ( pi^{*} ) orbital
11
189 The bond formed between the two
atoms by mutual sharing of electrons so as to complete their octets or duplets gives:
A. Covalent Compounds
B. Metallic Compound
c. lonic compound
D. none of these
11
190 Why are some covalent molecules
polar?
( A cdot O )
11
191 Q13. Write the resonance structures for SO, NO, and NO3 11
192 Statement I: Water is a polar molecule.
Statement II: Water has polar covalent
bonds.
A. Statement 1 is correct
B. Statement 2 is correct
c. statement 1 is correct but Statement 2 is not correct
D. Statement 1 is not correct but Statement 2 is correct
E. Both the Statement 1 and Statement 2 are correct
11
193 The ground state magnetic property of
( B_{2} ) and ( C_{2} ) molecules will be:
A . ( B_{2} ) paramagnetic and ( C_{2} ) diamagnetic
B. ( B_{2} ) diamagnetic and ( C_{2} ) paramagnetic
c. both are diamagnetic
D. both are paramagnetic
11
194 Answer the following questions with
respect to the compound ( N Oleft[B F_{4}right] )
(P) Bond order of the part underline.
(Q) Total number of ( sigma ) bonds in the
compound.
(R) Total number of ( pi ) bonds in the
compound.
(S) Number of hybrid orbitals involved in the hybridisation of boron.
11
195 In which of the following mixtures, the London dispersion force acts as a major intermolecular force of attraction?
A. Sodium chloride and water
B. Cyclohexane and carbon tetrachloride
c. water and ethyl alcohol
D. Benzene and acetone
11
196 Geometrical configuration of ( B F_{3} ) and
( N F_{3} ) molecules is:
A. The same because of same covalency of the central atom
B. Different because BF3 is non-polar
c. Different because BF3 is polar
D. None of the above is correct
11
197 Strongest bond is formed by the headon overlapping of :
A. ( 2 s ) -and ( 2 p ) -orbitals
B. ( 2 p- ) and ( 2 p ) -orbitals
c. ( 2 s- ) and ( 2 s ) -orbitals
D. All of these
11
198 A covalent bond is formed when:
A. transfer of electrons take place
B. sharing of electrons take place
C. both sharing and transfer of electrons takes place
D. neither sharing nor transfer of electrons takes place
11
199 Which of the following has a weak
force?
This question has multiple correct options
A. covalent bonds
B. ionic bonds
C . Dipole-dipole interaction
D. London dispersion force
11
200 Compare ( S-O ) bond angle for the
following molecules.
A ( . x>y )
B. ( y>x )
c. ( x=y )
D. None of these
11
201 Nodal planes of ( pi ) -bonds ( (mathrm{s}) ) in ( boldsymbol{C} boldsymbol{H}_{2}= )
( C=C=C H_{2} ) are located in:
A. all are in molecular plane
B. perpendicular plane which contains ( C-C sigma ) -bond
c. one in molecular plane and two in a plane perpendicular to molecular plane which contains ( C ) ( C sigma ) -bonds
D. two in molecular plane and one in a plane perpendicular to molecular plane which bisects ( C-C ) ( sigma ) -bonds at right angle
11
202 Q1. Explain the formation of a chemical bond. 11
203 The bond between two identical non
metal atoms has a pair of electrons. The
correct statement about this pair is:
A. Unequally shared between the two.
B. Transferred fully from one atom to another
c. Has identical spins
D. Equally shared between the atoms
11
204 Consider the Newmann projection
formula of most stable conformation of
3-hydroxybutanal. It is stable due to:
This question has multiple correct options
A. minimum torsional strain
B. intramolecular H bonding
C. its being in the anti conformation
D. all of these
11
205 In which of the following pairs, indicated bond is of greater strength?
and
( A )
B. I
c. Both are equal
D. None of the above
11
206 The molecule having three fold axis of symmetry is:
A ( . N H_{3} )
B. ( C_{2} H_{4} )
( c cdot C O_{2} )
D. ( S O_{2} )
11
207 Sugar is soluble in water due to:
A. High solvation energy.
B. Ionic character of sugar.
C. High conductivity character of sugar.
D. Hydrogen bond formation with water.
11
208 ( M g O ) has a high melting point because due to the highly charged ions, ionic force is strong and lattice energy is………
A . Highh
B. Low
c. Both are
D. None of these
11
209 Assertion
Ionic reactions are not instantaneous.
Reason

Oppositely charged ions exert strong
forces.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is
not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct

11
210 Which statement(s) is/are correct?
This question has multiple correct options
A. Polarizing power refers to cation
B. Polarizability refers to anion
C. Small cation is more efficient to polarise anion
D. Molecules in which cation having pseudo inert gas configuration are more covalent
11
211 Which of the following compound is expected to have the highest boiling point?
( boldsymbol{P H}_{3}, boldsymbol{N} boldsymbol{H}_{3},left(boldsymbol{C H}_{3}right)_{3} boldsymbol{N} )
A ( cdot N H_{3} )
B. ( left(C H_{3}right)_{3} N )
с. ( P H_{3} )
D. None of these
11
212 ( A sigma ) bonded molecule ( M X_{3} ) is ( T- )
shaped. The number of non-bonding pairs of electrons (on central atom) is
( A cdot 0 )
B. 2
c. 1
D. can be predicated only if atomic number of ( M ) is known
11
213 Which one of the following statements
about ( C_{2} ) molecule is wrong?
A. The bond order of ( C_{2} ) is 2 .
B. In vapour phase, ( C_{2} ) molecule is diamagnetic.
C. Double bond in ( C_{2} ) molecule consists of both ( pi ) – bonds
because of the presence of 4 electrons in two ( pi^{-} ) molecular orbitals.
D. Double bond in ( C_{2} ) molecule consists of one ( sigma ) bond
and one ( pi ) bond.
11
214 On treatment of the following compound with a strong acid, the most susceptible
site for bond cleavage is:
A. ( C 1-O 2 )
в. ( O 2-C 3 )
c. ( C 4-O 5 )
D. ( O 5-C 6 )
11
215 1,3,5,7- Octatetraene contains ( underline{X} boldsymbol{sigma}- )
bonds and ( underline{Y} pi- ) bonds. ( X ) and ( Y ) are:
A .23,4
B. 17,4
( mathbf{c} cdot 18,5 )
D. 33, 2
11
216 Covalent compounds are usually liquids or gases due to the weak force of attraction between their molecules.
A. True
B. False
11
217 Nitrogen molecule is a non polar
covalent compound.
A. True
B. False
11
218 ( boldsymbol{C}_{mathbf{1}}-boldsymbol{H}, boldsymbol{C}_{2}-boldsymbol{H}, boldsymbol{C}_{3}-boldsymbol{H} ) and ( boldsymbol{C}_{4}-boldsymbol{H} )
homolytic bond dissociation energy is in order:
A ( cdot C_{2}-H>C_{3}-H>C_{4}-H>C_{1}-H )
B. ( C_{1}-H>C_{4}-H>C_{2}-H>C_{3}-H )
( mathbf{c} cdot C_{2}-H>C_{3}-H>C_{1}-H>C_{4}-H )
D. ( C_{1}-H>C_{4}-H>C_{3}-H>C_{2}-H )
11
219 The volatility of ( H F ) is low as compare to other Hydra acid of Halogen because
of:
A. its low polarizability
B. the weak dispersion interaction between the molecules
c. its small molecular mass
D. its strong hydrogen bonding
11
220 Sugden introduced singlet linkage in which one electron is donated instead of
one pair of electrons.
A. True
B. False
11
221 What type of attraction occurs between the partial positively charged hydrogen atom in one water molecule and the
partial negatively charged oxygen atom in another water molecule?
A. Covalent bond
B. Dipole moment
c. lonic bond
D. van der Waals interaction
E. Hydrogen bond
11
222 Which of the following compound
processes zero dipole moment?
This question has multiple correct options
A. ( H_{2} O )
в. ( C H_{3} F )
c. ( C C l_{4} )
D. ( B F_{3} )
11
223 Find the species which is not perfectly planar.
A ( cdot dot{C} H_{3} )
B . ( dot{C} H F_{2} )
( mathbf{c} cdot: C H_{2} )
D. ( dot{N} O_{2} )
11
224 Arrange the following in increasing lattice energy.
( B e C O_{3}, M g C O_{3}, C a C O_{3}, S r C O_{3}, B c )
11
225 Strongest hydrogen bond is present in:
( mathbf{A} cdot C H_{3} O H )
в. ( C H_{4} )
( mathbf{c} cdotleft(C H_{3}right)_{2} C H O H )
D. ( left(C H_{3}right)_{3} C O H )
11
226 What is incorrect about the given
structure?

This question has multiple correct options
( A ). It has six D.U
B. It has ten ( s p^{2} ) hybrid C-atom
C. It has ten ( s p^{2}-s p^{2} ) C-C ( sigma ) bond
D. All are correct.

11
227 Which show ( boldsymbol{H} ) -bonding? This question has multiple correct options
A . o-Nitrophenol
B. water
c. ( H C l )
D. Ethyl acetoacetate
11
228 Compare the bond length ( x ) and ( y ) of the
above given compound.
( 4 cdot x=y )
( 3 cdot x>y )
( c cdot x>
11
229 Radius of 1st orbit of ( boldsymbol{H} ) & some orbit of
( B e^{3+} ) is same. Energy of their orbit of
( B e^{3+} ) is :
( mathbf{A} cdot-54.4 e V )
B. ( -13.6 e V )
c. ( -108.8 e V )
D. ( -27.2 e V )
11
230 What is the maximum number of
orbitals that can be identified with the
following quantum numbers?
( n=3, l=1, m_{l}=0 )
( A )
B. 2
( c cdot 3 )
D. 4
11
231 Which species is polar?
A. Trans-hex-3-ene
B. Trans-but-2-ene
c. ( P C l_{5} )
D. ( X e F_{6} )
11
232 ( H_{2} O ) is liquid but ( H_{2} S ) is gas. This is because of:
A. larger size of ( S )
B. acidic nature of ( H_{2} S )
c. hydrogen bonding
D. small size of ( O )
11
233 Which of the following changes in the respective bond order values are caused by removal of an electron from
( N_{2} ) and ( F_{2} ) molecules?
A. Decrease by 0.5 In both
B. Increase by 0.5 In both
c. Increase by 0.5 in the former and decrease by 0.5 in the latter
D. Decrease by 0.5 In the former and Increase by. 0.5 in the latter
E. No change in both
11
234 Statement I: A molecule of ethyne is
linear.
Because
Statement II: The carbon atoms in
ethyne are sp hybridized.
A. True, True CE
B. True, True
c. True, False
D. False, True
E. False, False
11
235 Draw the geometry of ( O S F_{4} ) using
VSEPR theory.
11
236 The covalency of central atom is
maximum in:
( mathbf{A} cdot H C N )
B. ( N H_{4}^{+} )
c. ( P C l_{5} )
D. ( H_{2} O )
11
237 Describe the change in hybridisation of the ( A l ) atom in the following reaction:
( boldsymbol{A l C l}_{3}+boldsymbol{C l}^{-} rightarrow boldsymbol{A l} boldsymbol{C l}_{4}^{-} )
11
238 All of the following are true about ion
EXCEPT:
A. lons can be formed by adding electrons to a neutral atom
B. lons can be formed by removing electrons from a neutral atom
c. lons can be formed by removing neutrons from a neutral atom.
D. lons can be positive and negative in charge
11
239 Which of the following compounds has
zero dipole moment?
( A )
B.
( c )
D
11
240 Which of the following species has four lone pairs of electrons in its outer shell
?
A . ( I )
в. ( O )
( c cdot C l )
D. ( H e )
11
241 For the reaction ( mathbf{N H}_{4}^{+}+mathbf{S}^{-2} rightleftharpoons )
( mathbf{N H}_{3}+mathbf{H S}^{-}, mathbf{N H}_{3} ) and ( mathbf{S}^{-2} ) are a group
of :-
A. Acids
B. Bases
c. Acid-base pair
D. None of these
11
242 What is the bond-order of ( C N ) ?
[Note : Write the answer after
multiplying it with ( 4] )
11
243 Number of molecules having non-zero
dipole moment
( boldsymbol{B} e C l_{2}, boldsymbol{X} e boldsymbol{F}_{2}, boldsymbol{N} boldsymbol{H}_{3}, boldsymbol{P} C l_{3} boldsymbol{F}_{2}, boldsymbol{P} boldsymbol{C l}_{2} boldsymbol{F}_{3}, boldsymbol{B} )
11
244 The inter nuclear distance in ( H_{2} ) and
( C l_{2} ) molecules are 74 and 198 pm.
respectively. What will be the bond
length of ( H C l ? )
11
245 Q19. Arrange the bonds in order of increasing ionic character in the molecules: LiF, K,O, NZ, SC
and CIF,
11
246 What would be the electron dot
structure of a molecule of sulphur
which is made up of eight atoms of sulphur?
11
247 From the list below, select the shape
that describes the ( H_{2} O )
A. Linear
B. Bent (v-shaped)
C. Trigonal planar
D. Pyramidal
E. Regular tetrahedral
11
248 State True or False.
Liquid ( N H_{3} ) does not contain Hydrogen bond.
A. True
B. False
11
249 Which are the species in which central
atom undergoes ( s p^{3} ) hybridization?
This question has multiple correct options
( mathbf{A} cdot S F_{4} )
в. ( S C l_{2} )
( mathbf{c} cdot S O_{4}^{2-} )
D. ( H_{2} O )
11
250 и орроrtu рuu –
Q12. Why B, is paramagnetic in nature while C2 is not?
11
251 The compound in which ( underline{C} ) uses its ( s boldsymbol{p}^{3} ) hybrid orbitals in bonding is:
A. ( H subseteq O O H )
B. ( left(H_{2} Nright)_{2} underline{C O} )
c. ( left(C H_{3}right)_{3} subseteq O H )
D. ( C H_{3} underline{C H O} )
11
252 To which of the following atoms hydrogen be bonded to in order for hydrogen bonding to be exhibited?
A. Bromine
B. lodine
C. Fluorine
D. Chlorine
11
253 The structure of ( I B r_{2}^{-} ) involves hybridisation of the type:
( A cdot s p^{3} )
B . ( s p^{3} d )
c. ( s p^{3} d^{2} )
D. none of these
11
254 Which of the following does not belong to the same homologous series?
A ( . C H_{4} )
B. ( C_{2} H_{6} )
( mathbf{c} cdot C_{3} H_{8} )
D. ( C_{4} H_{8} )
11
255 The carbon atoms in ( C_{2}(C N)_{4} ) are:
( mathbf{A} cdot s p ) hybridized
B ( cdot s p^{2} ) hybridized
C ( . s p ) and ( s p^{2} ) hybridized
D. ( s p, s p^{2} ) and ( s p^{3} ) hybridized
11
256 Which condition favours the bond format
ion?
A. Maximum attraction and maximum potential energy
B. Minimum attraction and minimum potential energy
C. Minimum potential energy and maximum attraction
D. None of the above
11
257 The number ( s p^{2}-s p^{2} ) sigma bonds in
the compound given below is:
( A )
B. 3
( c cdot 4 )
( D )
11
258 Magnesium reacts with an element ( (boldsymbol{X}) )
to form an ionic compound. If the ground state electronic configuration of
( (X) ) is ( 1 s^{2} 2 s^{2} 2 p^{3}, ) the simplest formula for this compound is:
A. ( M g_{2} X )
в. ( M g_{2} X_{3} )
с. ( M g_{3} X_{2} )
D. ( M g X_{2} )
11
259 Assertion
Statement ( -1: C_{3} O_{2} ) has linear
structure.
Reason
Statement -2: Each ( C ) atom in ( C_{3} O_{2} ) is
sp – hybridised.
A. Statement – 1 is true, Statement – 2 is true and Statement – 2 is correct explanation for Statement –
1
B. Statement – 1 is true, Statement – 2 is true and Statement – 2 is NOT the correct explanation for Statement – 1
c. statement -1 is true, statement -2 is false
D. statement -1 is false, Statement – 2 is true
11
260 The shape of water molecule which
should be tetrahedral has a bent or
distorted tetrahedral shape with a bond
angle ( 104.5^{circ} . ) What could be the reason
for this?
A. ( l p ) – ( l p ) repulsion is more than ( l p ) – ( b p ) repulsion
c. ( l p ) -lp repulsion is equal to ( l )p-( – )bp repulsion
D. Presence of lone pair does not affect the bond angle
11
261 What type of bond is formed if an atom captures an electron lost by another atom?
A. Hydrogen bonding
B. Covalent
c. lonic
D. Metallic
E. Polar covalent
11
262 Which one of the following pairs of molecules will have a permanent dipole moments for both members?
A ( cdot N O_{2} ) and ( O_{3} )
B. ( operatorname{SiF}_{4} ) and ( C O_{2} )
c. ( operatorname{SiF}_{4} ) and ( N O_{2} )
D. ( N O_{2} ) and ( C O_{2} )
11
263 Indicate the wrong statement according to valence bond therory:
A. a sigma bond is stronger then ( pi ) bond
B. p-orbitals always have only sidewise overlapping
c. s-orbitals never form ( pi ) – bonds
D. there can be only one sigmabond between two atoms
11
264 The electronic configuration of two elements ( X ) and ( Y ) are given below:
( boldsymbol{X}=mathbf{2}, mathbf{8}, mathbf{2} )
( boldsymbol{Y}=mathbf{2}, mathbf{8}, mathbf{7} )
The formula of a compound that can be formed between these two elements is:
A . ( X Y )
в. ( X Y_{2} )
c. ( X_{2} Y )
D. ( X Y_{3} )
11
265 Why water drops (dew) form on flowers and grass during morning hours of
winter season?
11
266 What is molecular orbital theory? with the help of energy level in homo nuclear diatomic orbitals arranfe the following series increasing order ( O_{2}^{2-}, O_{2}^{-}, O_{2}, O_{2}^{+} ) 11
267 How Lewis dot structure helps in understanding bond formation between
atoms?
11
268 Q Type your question
fundamental idea of VSEPR theory?
( A )
( B )
( c )
( D )
11
269 Identify compounds in which the central atom has incomplete octet.
( B F_{3}, A l C l_{3}, G a C l_{2}, M g C l_{2}, B e C l_{2} )
11
270 The structure of the enolic form of
( C H_{3}-C O-C H_{2}-C O-C H_{3} ) with
intra-molecular H-bonding is as given
above
f the given statement is correct
then enter 1 , else enter 0
( A )
11
271 Represent with the help of neat diagrams hydrogen bonding if present
in the molecules of ( boldsymbol{H} boldsymbol{F}-boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{H} boldsymbol{F} )
( -N H_{3}, ) aniline ( – ) aniline, ( H_{2} O )
( -boldsymbol{C}_{2} boldsymbol{H}_{5} boldsymbol{O} boldsymbol{H}, boldsymbol{H}_{2} boldsymbol{O}-boldsymbol{C} boldsymbol{H}_{3} boldsymbol{O} boldsymbol{C} boldsymbol{H}_{3}, boldsymbol{H}_{2} boldsymbol{O} )
( -boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4}, boldsymbol{H}_{2} boldsymbol{O}-boldsymbol{N} boldsymbol{a} boldsymbol{C l} )
11
272 The shape of chlorate ion is:
A . angular
B. pyramidal
c. tetrahedral
D. trigonal planar
11
273 Considering the state of hybridization of carbon atoms, the molecule among the following which is linear is :
A ( cdot C H_{3}-C H equiv C H-C H_{3} )
в. ( C H_{3}-C H=C H-C H_{3} )
c. ( C H_{2}=C H-C H_{2}-C equiv C H )
D. ( C H_{3}-C H_{2}-C H_{2}-C H_{3} )
11
274 How do the atoms combine in ( C a C l_{2} )
or Calcium Chloride?
A. By Forming metallic bond
B. By Forming co-ordinate covalent bond
c. By Forming ionic bond
D. By Forming covalent bond
11
275 The incorrectly matched pair, among the following is Molecule Shape
A . ( B r F_{5} ) Trigonal bipyramidal
B. ( S F_{4} ) See saw
c. ( C l F_{3} ) T-shape
D. ( N H_{4}^{+} ) Tetrahedral
E . ( N H_{3} ) Trigonal pyramidal
11
276 Which of the following represents isostructural pairs?
( mathbf{A} cdotleft[N F_{3}, N O_{3}^{-}right] ) and ( left[B F_{3}, H_{3} O^{+}right] )
B cdot ( left[N F_{3}, H N_{3}right] ) and ( left[N O_{3}^{-}, B F_{3}right] )
( mathbf{c} cdotleft[N F_{3}, H_{3} O^{+}right] ) and ( left[N O_{3}^{-}, B F_{3}right] )
D・ ( left[N F_{3}, H_{3} O^{+}right] ) and ( left[H N_{3}, B F_{3}right] )
11
277 Which of the following set of species have same hybridisation state but different shapes?
A ( cdot N O_{2}^{+}, N O_{2}, N O_{2} )
в. ( C l O_{4}, S F_{4}, X e F_{4} )
c. ( N H_{4}^{+}, H_{3} O^{+}, O F_{2} )
D. ( S O_{4}^{2-}, P O_{4}^{3-}, C l O_{4} )
11
278 Total number of valency (or bonding)
electrons required to form a molecule, where ( n= ) no. of atoms in a molecule:
A ( .2 n-2 )
B . ( n-2 )
( mathbf{c} cdot n+2 )
D. ( 2 n )
11
279 Calcium oxide is formed as a result of
transfer of ( _{-1-} ) valence electrons
A. one
B. two
c. three
D. four
11
280 In the vapour state, alkali metals may
exist as atoms or diatomic molecules. If
sodium forms a diatomic molecule,
what will be its bond order?
11
281 Which of the following has least bond
energy?
A. ( F_{2} )
в. ( H_{2} )
( c cdot N_{2} )
D. ( O_{2} )
11
282 Which shows the highest lattice energy?
A. ( R b F )
в. ( C s F )
( c . N a F )
D. ( K F )
11
283 If the bond dissociation energies of
( X Y, X_{2} ) and ( Y_{2} ) (all diatomic
molecules) are in the ratio of 1: 1: 0.5
and ( Delta H_{f} ) for the formation of ( X Y ) is
( -200 k J m o l^{-1}, ) the bond dissociation
energy of ( boldsymbol{X}_{2} ) will be:
A . ( 100 k J m o l^{-1} )
в. ( 300 k J m o l^{-1} )
c. ( 200 k J m o l^{-1} )
D. ( 800 k J m o l^{-1} )
11
284 What are the shapes of the molecules of
water and boron trifluoride?
begin{tabular}{lll}
& ( boldsymbol{H}_{2} boldsymbol{O} ) & ( boldsymbol{B} boldsymbol{F}_{3} ) \
cline { 1 – 3 }( _{mathrm{A}} ) & linear & pyramidal \
B & linear & trigonal \
C & non-linear & pyramidal \
D & non-linear & trigonal
end{tabular}
( A )
B. B
( c cdot c )
D.
11
285 Molecules possess more energy than the total energy of their combining atoms.
A. True
B. False
11
286 If true enter 1 , else enter ( 0 . ) The strongest
hydrogen bond is formed between fluorine and hydrogen.
11
287 s-character in hybrid orbitals of ( boldsymbol{C} boldsymbol{H}_{4} )
and ( B e C l_{2} ) are respectively:
A. 0.75,0.5
B. 0.25, 0.5
c. 0.75,0.334
D. 0.25, 0.33
11
288 What is the bond order of ( N O )
molecule?
( mathbf{A} cdot mathbf{1} )
B . 2
c. 2.5
D. 3
11
289 The maximum number of ( 90^{circ} ) angles between the bond pair-bond pair of
electrons is observed in:
A ( cdot d s p^{2} )
B. ( s p^{3} d ) hybridization
c. ( d s p^{3} ) hybridization
D. ( s p^{3} d^{2} ) hybridization
11
290 Assertion
Bond order for ( C O^{+} ) is more than bond
order in ( C O ) whereas bond order in ( N_{2}^{+} )
is less than ( N_{2} ) whereas both are
isoelectronics.
Reason
Both have same bond order.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
291 Which of the following combinations of combining atoms of elements gives rise to the strongest ionic bond?
A. Sodium and iodine
B. Sodium and chlorine
c. Sodium and bromine
D. Sodium and fluorine
11
292 Which is the correct expression in the
formation of ( mathrm{NaCl} ) ?
( mathbf{A} cdot Delta H_{f}=Delta H_{s u b}+E_{i}+0.5 E_{b o n d} ) dissociation ( +E_{e a}+ )
( U_{text {lattice enthalpy}} )
( mathbf{B} cdot Delta H_{f}=Delta H_{s u b}-E_{i}+0.5 E_{b o n d} d i s s o c i a t i o n+E_{E A}+ )
( U_{text {lattice enthalpy}} )
( mathbf{C} cdot Delta H_{f}=Delta H_{s u b}+E_{i}-0.5 E_{b o n d} d i s s o c i a t i o n+E_{E A}+ )
( U_{text {lattice enthalpy}} )
( mathbf{D} cdot Delta H_{f}=Delta H_{s u b}+E_{i}+0.5 E_{b o n d} d i s s o c i a t i o n+E_{E A}- )
( U_{text {lattice enthalpy}} )
11
293 The ion with pyramidal shape is:
( A cdot S_{2} O_{3}^{2} )
B. ( S O_{3}^{-2} )
( mathrm{c} cdot mathrm{SO}_{4}^{2-} )
D. ( S_{2} O_{8}^{2-} )
11
294 Which is correct statement about the
diborane structure?
A. All ( H B H ) bond angles are equal
B. All ( H-B ) bond lengths are equal
c. It has two three-centre- 2 -electron bonds
D. All hydrogen and boron atoms are in one plane
11
295 Q3. Out of o and a bonds, which one is stronger and why? 11
296 The higher values of specific heat of water in comparison to other liquids is
due to:
A. high dielectric constant
B. polarity
c. ( H ) -bonding
D. none of the above
11
297 Which one of the following arrangements of molecules is correct on the basis of their dipole moments?
A. ( B F_{3}>N F_{3}>N H_{3} )
B. ( N F_{3}>B F_{3}>N H_{3} )
c. ( N H_{3}>B F_{3}>N F_{3} )
D. ( N H_{3}>N F_{3}>B F_{3} )
11
298 The common features of the species
( N_{2}^{2-}, O_{2} ) and ( N O^{-} ) are:
A. bond order is three and are isoelectronic
B. bond order is two and are isoelectronic
C. bond order is three but are not isoelectronic
D. bond order is two but are not isoelectronic
11
299 ‘A’ represents central atom, ‘B’ number of bond pairs and ‘E’ number of lone
pairs. Then the one having ( boldsymbol{A} boldsymbol{B}_{mathbf{5}} boldsymbol{E} )
formula is
A ( cdot P C l_{5} )
в. ( S F_{6} )
c. ( B C l_{3} )
D. ( C l F_{5} )
11
300 Compound formed by ( s p^{3} d^{-} ) hybridization will have which of the following structure?
A. Trigonal bipyramidal
B. T-shaped
c. Linear
D. Either of these depending on the number of lone pair of electrons on central atom
11
301 State True or False.
Sn ( C l_{2} ) is non-linear molecule.
11
302 Which of the following molecule have zero dipole moment?
( (a) C_{6} H_{6}(b) X e F_{2} )
( (c) S O_{2} )
( (d) S F_{4}(e) )
( boldsymbol{S} boldsymbol{F}_{boldsymbol{6}} )
( A cdot(b) ) and ( (d) )
B. (a), (b) and (e)
c. (a) and (e)
D. (c) and (d)
11
303 Chlorine ( left(C l^{17}right) ) free radical contains how many electrons around the nucleus
( ? )
A . 16
B . 17
( c cdot 18 )
D. 19
11
304 Explain the terms
(i) bonding molecular orbitals,
(ii) antibonding molecular orbitals,
(iii) non-bonding molecular orbitals.
11
305 Methanol and ethanol are miscible with
water due to their:
A. covalent character
B. hydrogen bonding character
c. oxygen bonding character
D. non-polar nature
11
306 Statement (1) : There is ionic bonding in
Sodium chloride compound. Statement (2) : Same elctronegativity is
shown by sodium and chlorine atoms.
A. false, false
B. true, false
c. true, true
D. false, true
E. Statement (1) and statement
(2) are true and statement (2) is the correct explanation of Statement
(1)
11
307 What kind of compound is Magnesium
chloride or ( M g C l_{2} )
This question has multiple correct options
A. lonic compound
B. Electrovalent compound
c. covalent compound
D. Co-ordinate covalent compound
11
308 The higher values of specific heat of water than other liquids has been accounted in terms of :
A. High dielectric constant
B. Polarity
c. H-bonding
D. None of these
11
309 The strongest bonding out of the following is :
A. vander Waal
B. ionic
c. covalent
D. metallic
11
310 What is the bond order of ( N O^{+} ? ) 11
311 Draw electron dot representation for the formation of ( boldsymbol{H} boldsymbol{C l} ) 11
312 The bond order depends on the number of electrons in the bonding and antibonding orbitals. Which of the following statements is/are correct about bond order?
A. Bond order cannot have a negative value.
B. It always has an integral value
c. It is a nonzero quantity.
D. It can assume any value-positive, integral or fractional, including zero.
11
313 The hybrid orbital of the central atom in
( A l F_{4}^{-} ) is:
( mathbf{A} cdot s p )
B . ( s p^{2} )
( mathbf{c} cdot s p^{3} )
D. ( d s p^{2} )
11
314 An electrovalent compound does not exhibit space isomerism due to:
A. presence of ions
B. high melting point
c. strong electrostatic forces between the constituent inss
D. non-directional nature of electrovalent bond
11
315 Assertion
A cation of less size is more favorable
for ionic bond formation.
Reason
If the size of the atoms is small, the
nuclear pull on the electrons is more.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
316 7
Q Type your question
form a hydrogen molecule?
( mathbf{A} )
( B )
( mathbf{C} )
( D )
11
317 The maximum possible number of hydrogen bonds formed by one water molecule is:
A. one
B. two
c. three
D. four
11
318 H-bond is not present in:
A. water
B. glycerol
c. hydrogen fluoride
D. hydrogen sulphide
11
319 The increasing order of the strength of hydrogen bond in the following mentioned linkages is:
(i) ( boldsymbol{O} boldsymbol{H}-boldsymbol{S} )
(II) ( boldsymbol{S} boldsymbol{H}-boldsymbol{O} )
(iii) ( boldsymbol{F} boldsymbol{H}-boldsymbol{F} )
(iv) ( boldsymbol{F H}-boldsymbol{O} )
( A cdot(text { i) }<(text { ii })<(text { iv })<(text { iii }) )
B. (ii) < (i) < (iv) < (iii)
c. (i) ( < ) (ii) ( < ) (iii) ( < ) (iv)
D. (ii) < (i) < (iii) < (iv)
11
320 The bond of ( H g-C l ) is more ionic in
( H g C l_{2} ) than that in ( H g_{2} C l_{2} )
A. True
B. False
11
321 Q. 19 Which of the following sets contain only isoelectronic ions?
(a) Zn, Ca2+, Ga3+, AP+
(b) K, Ca, sc, cr
(c)p-, 52, cr, K+
(d) Ti+ , Ar, Cr+, V5+
11
322 ( A g C l ) is in nature.
A. covalent
B. ionic
c. polar
D. non-polar
11
323 ( ln C u S O_{4} cdot 5 H_{2} O ) all ( C u-O ) bond length
are not equal. Find the total number of
shorter Cu-O bonds.
11
324 Which of the following will have the molecular shape of a triangle bipyramid?
A ( . P F_{3} C l_{2} )
в. ( I F_{5} )
( mathbf{c} cdot B r F_{5} )
D. ( S b F_{2}^{2} )
11
325 Which of the following models best describes the bonding within a layer of the graphite structure?
A. metallic bonding
B. ionic bonding
c. non-metallic covalent bonding
D. van der Waals forces
11
326 The Lewis dot diagram representing ammonia molecule is: 11
327 The type of hybridization in ( B ) of ( B_{2} H_{6} )
is:
( A cdot s p^{2} )
B . ( s p^{3} )
( c cdot s p )
D. ( d s p^{2} )
11
328 The molecule having permanent dipole
moment is:
A. ( S F_{4} )
в. ( X e F_{4} )
( mathrm{c} cdot operatorname{siF}_{4} )
D. ( B F_{3} )
11
329 Which of the following overlapping results non-bonding molecular orbitals, if z-axis is considered as internuclear
axis?
A ( cdot p_{z}+p_{z} )
B . ( p_{y}+p_{y} )
c. ( p_{x}+s )
D. ( p_{y}+s )
11
330 Which of the following compound of Xenon has pyramidal geometry?
A. ( X e O F_{4} )
в. ( X e F_{2} )
c. ( x e O_{3} )
D. ( X e F_{4} )
11
331 Among the following, the pair in which the two species are not isostructural is :
( A cdot I O_{3}^{-} ) and ( X e O_{3} )
B ( cdot P F_{6}^{-} ) and ( S F_{6} )
( mathbf{c} cdot B H_{4}^{-} ) and ( N H_{4}^{+} )
D. ( C O_{3}^{2-} ) and ( N O_{2}^{-} )
11
332 The compound with no dipole moment
is:
A. methyl chloride
B. carbon tetrachloride
c. methylene chloride
D. chloroform
11
333 The energy required to brake one mole
of ( C l-C l ) bonds in ( C l_{2} ) is
( 242 k j m o l^{-1} . ) The longest wavelength
of light capable of breaking single ( C l )
( C l ) bond is:
( left(c=3 times 10^{8} m s^{-} 1 text { and } N_{A}=6.02 timesright. )
( left.10^{23} m o l^{-1}right) )
A . ( 494 n m )
В. 594 пт
( c .640 n m )
D. 700 nm
11
334 Which of the underlined atoms in the
molecules shown below have ( s p )
hybridization?
(u) ( C H_{2} C H C H_{3} )
(v) ( C H_{2} ) CCHCl
( (w) C H_{3} C H_{2}^{+} )
( (x) H-C=C-H )
( (y) C H_{3} C N )
(z) ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C} underline{boldsymbol{N}} boldsymbol{N} boldsymbol{H}_{boldsymbol{z}} )
A. ( x ) and ( z )
B. ( x, y ) and ( z )
c. u, w and ( x )
D. ( v, x ) and ( y )
11
335 Which of the following is not a covalent compound?
A. ( C O_{2} )
B. ( C l_{2} )
( mathbf{c} cdot N a_{2} O )
D. ( C H_{4} )
11
336 Number of double bond in ( H_{2} N O H ) is: 11
337 The above electron-dot formulas for
carbon dioxide both satisfy the octet
rule for all of the atoms. Which of these
structures is the better structure and
why is this the case?
[
begin{array}{cc}
: mathrm{O}=mathrm{C}=mathrm{o} & : mathrm{O} equiv mathrm{C}-ddot{mathrm{O}}: \
mathbf{A} & mathbf{B}
end{array}
]
A. “A” is the better structure because there is no formal charge on any of the atoms.
B. “B” is the better structure because the bond energies of a single bond and a triple bond are higher than the bond energies of two double bonds.
C. “A” is the better structure because all the bonds and non-bonding electron pairs are arranged in a symmetrical pattern.
D. “B” is the better structure because there are opposite formal charges on the two oxygen atoms which attract each other and give the molecule a lower energy.
11
338 In which of the following bond angle is maximum?
A ( . N H_{3} )
B. ( N H_{4}^{+} )
c. ( P C l_{3} )
D. ( S C l_{2} )
11
339 Hybridisation state of ( X e ) in ( X e F_{2} )
( X e F_{4}, ) and ( X e F_{6} ) respectively are:
( mathbf{A} cdot s p^{2}, s p^{3} d, s p^{3} d^{2} )
B . ( s p^{3} d, s p^{3} d^{2}, s p^{3} d^{3} )
c. ( s p^{3} d^{2}, s p^{3} d, s p^{3} d^{3} )
D ( cdot s p^{2}, s p^{3}, s p^{3} d )
11
340 Assertion
All ( boldsymbol{F}-boldsymbol{S}-boldsymbol{F} ) angles in ( boldsymbol{S} boldsymbol{F}_{4} ) is greater
than ( 90^{circ} ) but lesser than ( 180^{circ} )
Reason
The lone pair-bond pair repulsion is stronger than bond pair-bond pair repulsion.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
341 Hybridisation involves:
A. Orbitals of same atom with slightly different energies
B. Orbitals of different atoms but with equal energies
C. Orbitals of different atoms with different energies
D. Orbitals of the same atom with exactly equal energies
11
342 Q21. Apart from tetrahedral geometry, another possible geometry for
1 geometry, another possible geometry for CH, is square planar with the
4
pour H atoms at the corners of the square and the Catom at its centre. Explain why CH4 is not
square planar?
11
11
343 Among the following molecules, which of the following has non-polar covalent bonds?
A ( . H_{2} )
в. ( O_{2} )
( c cdot C l_{2} )
D. All of the above
11
344 Which molecule is T-shaped?
A. ( B e F_{2} )
в. ( B C l_{3} )
c. ( N H_{3} )
D. ( C l F_{3} )
11
345 In its covalent compounds, the
hydrogen atom has the electronic configuration analogous to that of
A. neon
B. helium
c. argon
D. lithium
11
346 The possible structure(s) of
monothiocarbonate ion is:
( A )
B.
( c )
D.
11
347 State True or False.
( X e F_{4} ) molecule is square planar in shape.
A. True
B. False
11
348 Q. 33 Explain the shape of BrF5.
LO
11
349 The bond order of individual carbon-
carbon bonds in benzene is:
A. one
B. two
c. between one and two
D. one and two alternately
11
350 Polarizability of halide ions increases in
the order:
A ( cdot F^{-}<I^{-}<B r^{-}<C l )
B. ( C l^{-}<B r^{-}<I^{-}<F^{-} )
c. ( I^{-}<B r^{-}<C l^{-}<F^{-} )
D. ( F^{-}<C l^{-}<B r^{-}<I^{-} )
11
351 During the formation of ( M g C l_{2} ) by Born Haber cycle, which of the following
occurs?
A . lonisation of ( M g ) to ( M g^{+2} )
B. Bond dissociation of ( C l_{2} )
c. Sublimation of ( M g )
D. Electron gained by ( C l )
E. All of these
11
352 Heat evolved in the reaction ( boldsymbol{H}_{2}+ )
( C l_{2} rightarrow 2 H C l ) is ( 182 k J )
(Bond energies ( boldsymbol{H}-boldsymbol{H}= )
( 430 k J / m o l e, C l-C l-242 k J / m o l e) )
The ( H-C l ) bond energy is:
A. ( 763 k J / ) mole
в. ( 427 k J / ) mole
c. ( 336 k J / ) mole
D. ( 154 k J / ) mole
11
353 Bond length depends upon
This question has multiple correct options
A. bond order
B. ( pi ) -bonding
C. state of hybridization
D. none of these
11
354 Give the hybridization of carbon in
currect showing
A ( cdot C O_{3}^{2-} S P^{3} d )
B. Diamond ( S P^{3} )
C . Graphite ( S P^{3} )
D. Fullerene ( S P^{3} )
11
355 Assertion
Bond order of ( boldsymbol{O}_{2} ) and ( boldsymbol{B} boldsymbol{N} ) is same.
Reason
( O_{2} ) and ( B N ) are isoelectronic.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
356 Find the oxidation number of Sodium in
NaCl.
( A cdot+1 )
B. – –
( c cdot+2 )
( D cdot-2 )
11
357 Which of the following species is diamagnetic in nature?
A ( cdot H_{2}^{-} )
в. ( H_{2}^{+} )
( mathrm{c} cdot mathrm{H}_{2} )
D. ( H e_{2}^{+} )
11
358 In solid ice, oxygen atom is surrounded
A. Tetrahedrally by 4 hydrogen atoms
B. Octahedrally by 2 oxygen and 4 hydrogen atoms
C . Tetrahedrally by 2 hydrogen and 2 oxygen atoms
D. Octahedrally by 6 hydrogen atoms
11
359 How many ( sigma ) – and ( pi ) -bonds are present in each of the following molecules?
(a) ( boldsymbol{H} boldsymbol{C} equiv boldsymbol{C}-boldsymbol{C H}=boldsymbol{C H}-boldsymbol{C H}_{3} )
(b) ( boldsymbol{C H}_{2}=boldsymbol{C}=boldsymbol{C H}-boldsymbol{C H}_{3} )
11
360 Assertion
( s p^{3} ) hybrid carbon atom is more electronegative than sp hybrid carbon
atom.
Reason
( s p^{3} ) hybrid orbitals are more closer to
the nucleus
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
361 The molecules like ( B r F_{5} ) and ( X e O F_{4} )
are square pyramidal in shape. What is the type of hybridisation shown in these molecules?
A. ( d s p^{3} )
B. ( d s p^{2} )
( mathbf{c} cdot s p^{3} d )
D. ( s p^{3} d^{2} )
11
362 Which hydrogen halides has maximum
ionic character?
( mathbf{A} cdot H F )
в. ( H C l )
c. ( H I )
D. ( H B r )
11
363 The number of Ip-bp repulsion present
in ( C l F_{3} ) at nearly 90 degree angle are :
( A )
B. 2
( c cdot 3 )
D. 4
11
364 Valence electrons in the element ( A ) are 3
and that in element ( B ) are ( 6 . ) Most
probable compound formed from ( A ) and
( B ) is:
A ( . A_{2} B )
в. ( A B_{2} )
( mathbf{c} cdot A_{6} B_{3} )
D. ( A_{2} B_{3} )
11
365 Helium is subjected to electrical discharge. The following species is not present in the discharge tube:
( mathbf{A} cdot mathrm{He}^{+} )
B. ( mathrm{He}_{2}^{+} )
c. ( mathrm{He}_{2} )
D. He
11
366 Geometry of central atom in ( S N F_{3} ) is: 11
367 The skeletal structure of ( C H_{3} C O O H )
as shown above is correct but some of
the bonds are shown incorrectly. Write the correct Lewis structure for acetic
acid.
[
mathrm{H}=frac{mathrm{H}}{mathrm{C}}-mathrm{C}-mathrm{O}-mathrm{H}
]
11
368 In which of the following changes bond
order decreases?
This question has multiple correct options
A ( cdot C O ) to ( C O^{+} )
B. ( N_{2} ) to ( N_{2}^{+} )
( mathbf{c} cdot H_{2} ) to ( H_{2}^{+} )
D. ( H_{2} ) to ( H_{2}^{-} )
11
369 The valency of an atom is equal to its combining capacity.
A. True
B. False
11
370 The strongest bond is present in:
A. ( B r_{2} )
в. ( I_{2} )
( c cdot C l_{2} )
D. ( F_{2} )
11
371 The bond between chlorine and bromine
in ( boldsymbol{B} boldsymbol{r} boldsymbol{C} boldsymbol{l} )
A. ionic
B. non polar
c. polar with negative end on ( B r )
D. polar with negative end on ( C l )
11
372 The number of sigma and pi bonds in
a molecule of cyanogen are:
A .4,3
в. 3,4
( c .5,2 )
D. 3,5
11
373 Energy is released during the formation
of:
A. hydride ion
B. oxide ion
c. ferrous ion
D. ferric ion
11
374 For the formation of ( M g C l_{2}, ) which of
the followings are correct? This question has multiple correct options
A. ( M g ) loses two electrons
B. each ( C l ) atom gains 2 electrons
c. each ( C l ) atom gains one electron
D. ( M g ) and ( C l ) shares electron to gain stable octet configuration
11
375 Which of the following exhibit/s ( mathrm{H} ) bonding?
A ( . C H_{4} )
в. ( H_{2} S e )
( mathbf{c} cdot N_{2} H_{4} )
D. ( H_{2} S_{S} )
11
376 Q. 35 Why does type of overlap given in the following figure not result in bond
formation?

Z
(II)
11
377 The bonds present in ( left(N_{2} O_{5}right) ) are:
A. only ionic
B. covalent
c. dative
D. both ionic and covalent
11
378 How many valence electrons are present in the Lewis structure of ( S O_{2} ? )
A . 8
B . 10
( c cdot 6 )
D. 12
11
379 When sodium and chlorine react, energy
¡s:
A. released and ionic bond is formed.
B. released and covalent bond is formed.
C. absorbed and covalent bond is formed.
D. absorbed and ionic bond is formed.
11
380 Pi bond is formed between the two
atoms when their is a:
A. donation of electron pair from one atom to another
B. axial overlapping of atomic orbitals
C. transfer of one or more than one electron from one atom to another
D. lateral overlapping of atomic orbitals
11
381 Strength of hydrogen bond is intermediate between:
A. van der Waal’s forces and covalent bond
B. ionic bond and covalent bond
c. ionic bond and metallic bonding
D. none of the above
11
382 What is the nature of chemical bonding
between ( C s ) and ( F ? )
A. Ionic
B. Covalent
c. coordinate
D. Metallic
11
383 The shapes ( boldsymbol{P C l}_{4}^{+}, boldsymbol{P C l}_{4}^{-} ) and ( boldsymbol{A} boldsymbol{s} boldsymbol{C l}_{5} )
are respectively:
A. square planar, tetrahedral and see-saw
B. tetrahedral, see-saw and trigonal bipyramidal
c. tetrahedral, square planar and pentagonal bipyramidal
D. trigonal bipyramidal, tetrahedral and square pyramidal
11
384 Write four difference between
heterogeneous and homogeneous
mixtures.
11
385 Assuming ( (2 s-2 p) ) mixing is not
operative, the paramagnetic species among the following is :
( mathbf{A} cdot B e_{2} )
в. ( B_{2} )
c. ( C_{2} )
D. ( N_{2} )
11
386 Dipole moment ( propto ) diff.in ( e^{-} ) unity is
( boldsymbol{H} boldsymbol{F}>boldsymbol{H} boldsymbol{C l}>boldsymbol{H} boldsymbol{B r}>boldsymbol{H} boldsymbol{I} )
A. True
B. False
11
387 Chloro compound of vanadium has only
spin magnetic moment of ( 1.73 B M ) This vanadium chloride has the
formula:
[Atomic number of ( boldsymbol{V}=mathbf{2 3}] )
A ( cdot V C l_{2} )
в. ( V C l_{4} )
c. ( V C l_{3} )
D. ( V C l_{5} )
11
388 Helium is found as a monoatomic gas.
Explain this on the basis of M.O.T.
11
389 Which of the following facts regarding
bond order is not valid?
A. Bond order is given by the number of bonds between the two atoms in a molecule
B. With increase in bond order, bond enthalpy of the molecule decreases
C. Isoelectronic molecules and ions have identical bond
orders
D. With increase in bond order, bond length decreases
11
390 Which of the following compounds has
( s p^{2} ) -hybridization?
A ( cdot C O_{2} )
в. ( S O_{2} )
( c cdot N_{2} O )
D. ( C O )
11
391 Select the correct statements(s)
This question has multiple correct options
A. For the same charge and the same size, a pseudo noble gas type cation with ( 18 e^{-} ) in the outermost shell is more polarizing than the cation of noble gas type with ( 8 e^{-} ) in the outermost shel
B. The degree of covalency increases in descending a group in the transition metal ions for a particular oxidation state
C. Size increases in descending a group in the transition metal ions for a particular oxidation state
D. Covalency decreases in descending a group in the transition metal ions for a particular oxidation
11
392 Draw the electron dot stucture
of Acetylene
( A )
B.
and
c. both A and B
D. none of these
11
393 Which of the following statements are
correct?
This question has multiple correct options
( mathbf{A} cdot O_{2}^{+} ) has higher bond energy than ( O_{2} )
B. Bond length of ( O_{2} ) is ( 0.121 n m ) and bond length of ( O_{2}^{-} ) is ( 0.112 n m )
C. The hybrid orbitals of ( C ) in ( C O ) can be shown by ( (s p)^{2}(s p)^{0}left(p_{x}right)^{1}left(p_{y}right)^{1} )
D. Bond dissociation energy of ( C l_{2} ) is greater than ( F_{2} )
11
394 In which of the following species the
interatomic bond angle is ( 109^{circ} 28^{prime} ? )
A ( cdot N H_{3},left(B F_{4}right)^{-1} )
B . ( left(N H_{4}right)^{+}, B F_{3} )
c. ( N H_{3}, B F_{3} )
D. ( left(N H_{2}right)^{-1}, B F_{3} )
11
395 Is ( s p^{3} d^{2} ) hybridization the same as
( d^{2} s p^{3} ) hybridization?
11
396 The actual formula of sodium chloride
is:
A . ( N a C l )
B. ( N a^{+} C l^{-} )
c. ( left(N a^{+} C l^{-}right)_{n} )
D. ( N a_{n} C l_{n} )
11
397 Why does ( H e ) exist whereas ( H e_{2} ) does
not?
11
398 Number of bonding electrons and anti-
bonding electrons in ( 2 p ) MO of ( N_{2} )
molecule are respectively:
A .6,2
в. 4,0
c. 6,0
D. 4,2
11
399 The state of hybridization of ( C_{2}, C_{3}, C_{5} )
and ( C_{6} ) of the hydrocarbon is in the
following sequence:
A ( cdot s p, s p^{2}, s p^{3} ) and ( s p^{2} )
B . ( s p, s p^{3}, s p^{2} ) and ( s p^{3} )
( mathbf{c} cdot s p^{3}, s p^{2}, s p^{2} ) and ( s p )
D. ( s p, s p^{2}, s p^{2} ) and ( s p^{3} )
11
400 The EN of caesium ( (C s) ) is 0.7 and that
of chlorine ( ( C l ) ) is ( 3.5 . ) Predict the bond
formed between them.
11
401 Although both ( C O_{2} ) and ( H_{2} O ) are
triatomic molecules, the shape of ( boldsymbol{H}_{2} boldsymbol{O} )
molecule is bent while that of ( C O_{2} ) is
linear. Explain this on the basis of dipole moment.
11
402 The state of hybridization for the transition state of hydolysis
mechanism of ( B C l_{3} ) and ( S F_{4} ) are
respectively:
A ( cdot s p^{2}, s p^{3} d )
в. ( s p^{3}, s p 3 )
( mathbf{c} cdot s p^{3}, s p^{3} d^{2} )
( mathbf{D} cdot s p^{3}, s p^{3} d )
11
403 Which of the following pairs will form the most stable ionic bond?
A. ( N a ) and ( C l )
B. ( M g ) and ( F )
c. ( L i ) and ( F )
D. ( N a ) and ( F )
11
404 ( p- ) orbitals of an atom in presence of magnetic field are:
A. three fold degenerate
B. two fold degenerate
c. non-degenerate
D. none of these
11
405 If the bond dissociation energies of ( boldsymbol{X} boldsymbol{Y} )
( X_{2} ) and ( Y_{2} ) (all diatomic molecules) are
in the ratio of 1: 1: 0.5 and ( Delta H_{f} ) for the formation of ( boldsymbol{X} boldsymbol{Y} ) is ( -mathbf{2 0 0} ) kJ/mol. The
bond dissociation energy of ( X_{2} ) will be :
( mathbf{A} cdot 100 mathrm{kJ} / mathrm{mol} )
B. 800 kJ/mol
c. 300 kJ/mol
D. 400 kJ/mol
11
406 Which of the following hydrocarbons has the lowest dipole moment?
A. cis-2-butene
B. 2-butyne
c. I=butyne
D. ( H_{2} C=C H-C equiv C H )
11
407 Which of the following has greatest ( boldsymbol{H}- )
bonding?
A. Acetone
B. Ethanol
c. Methanol
D. All have same
11
408 Consider the given lewis dot structure:
The formal charges on ( B ) and ( F ) are
respectively.
4. ( -1 . )
3. -1,-1
( c cdot 0,- )
( D )
11
409 By looking at the Lewis structure of an ammonia ( left(mathrm{NH}_{3}right) ) molecule, shape of an ammonia molecule is described by
which one of the following?
A. Trigonal pyramidal
B. T-shaped
c. Square planar
D. Trigonal planar
E. Tetrahedral
11
410 Which of the following statements
is/are true?
This question has multiple correct options
A. It is impossible to satisfy the octet rule for all atoms in ( X e F_{2} )
B. For ozone molecule, both the oxygen-oxygen bonds are of equal length.
C. The bond in ( N O^{+} ) should be stronger than the bond in
( N O )
D. For ozone molecule, one oxygen-oxygen bond is stronger than the other oxygen-oxygen bond.
11
411 Which of the following will form ( sigma ) -bond (generally)?
A. s-s overlapping
B. Hybrid orbital overlapping
c. s-p overlapping
D. All of these
11
412 Two nitrogen atom form a nitrogen molecule by sharing
A. 2 pairs of electrons.
B. 3 pairs of electrons.
c. 4 pairs of electrons
D. 1 pairs of electrons
11
413 n which of the following pairs, indicated bond is of greater strength?
( (I) )
( A )
B.
c. Both are equal
D. cannot determine
11
414 Q16. Why N, is more stable than 0,? Explain on the basis of molecular orbital theory.
ADAT
11
415 Q.52 Match the species in Column I with the type of hybrid orbitals in Column II.
Column 1 Column II
A. SFA 1. sp² d²
B. IF 2. d sp3
C. Not 3. sp²d
D. NH 4. sp3
5. sp
11
416 ( ” P C l_{3} ) has a tetrahedral structure.”
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
417 Assertion
( A l C l_{3} ) is called aluminum trichloride.
Reason
Prefixes are used when naming
covalent compounds.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.
11
418 Q5. Predict the shapes of the following molecules using VSEPR theory!
(i) BeCl, (ii) SiC14
11
419 Which of the following is least volatile?
A ( . H C N )
в. ( H-F )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. ( C S_{2} )
11
420 The type of bond formed between two electronegative atoms would be:
A . covalent
B. ionic
c. coordinate
D. all of these
11
421 LCUTTIVOLI
Q19. Define antibonding molecular orbital.
11
422 The following table shows the electronic configuration of the elements ( boldsymbol{W}, boldsymbol{X}, boldsymbol{Y}, boldsymbol{Z} )
[
begin{array}{lllll}
text { Element } & mathrm{w} & mathrm{x} & mathrm{Y} & mathrm{z} \
begin{array}{l}
text { Electronic } \
text { configuration }
end{array} & begin{array}{l}
2, \
8,1
end{array} & begin{array}{l}
2, \
8,
end{array} & begin{array}{l}
2, \
7
end{array} & 5
end{array}
]
Answer the following questions based on the table above:
(i) What type of Bond is formed between
1. ( W ) and ( X )
2. ( Y ) and ( Z )
(ii) What is the formula of the
compound formed between:
1. ( X ) and ( Z )
2. ( W ) and ( X )
11
423 Write the electronic configuration of
Lithium ( left(boldsymbol{L} boldsymbol{i}_{2}right) ) molecule. What is its
bond order?
11
424 When ( O_{2} ) is absorbed on a metallic
surface, electron transfer occurs from
the metal to ( O_{2} ). The true statement(s)
regarding this adsorption is(are):
This question has multiple correct options
A. ( O_{2} ) is physisorbed
B. heat is released
C. occupancy of ( pi_{x_{p}^{*}} ) of ( O_{2} ) is increased
D. bond length of ( O_{2} ) is increased
11
425 Solid ( N_{2} O_{5} ) is :
A. lonic
B. Covalent
c. coordinate
D. None
11
426 Consider the following Lewis
Dot structure:
( [: ddot{boldsymbol{N}}=boldsymbol{N}=ddot{boldsymbol{N}}:]^{-} )
The formal charge on the central ( N ) atom is:
11
427 Which of the following compound exhibits Hydrogen bonding?
( boldsymbol{C H}_{3} boldsymbol{N} boldsymbol{H}_{2} ) and ( boldsymbol{C H}_{3} boldsymbol{S H} )
A. ( C H_{3} N H_{2} )
в. ( C H_{3} S H )
c. Both
D. None
11
428 In ( mathrm{CaF}_{2} ), the number of electron(s)
transferred from calcium to fluorine
atoms are
( A cdot 1 )
B. 2
( c cdot 3 )
D. 4
11
429 Assertion
All ( C-C-C ) bonds angles in
Isobutene ( left(boldsymbol{C H}_{3}-underset{mid}{boldsymbol{C}}=boldsymbol{C H}_{2}right) ) are
( boldsymbol{C H}_{3} )
different.
Reason
( C H_{3}( ) Methyl group) show steric crowding.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
430 ratio of carbon and oxygen in carbon dioxide molecule.
A . 2:
B. 3:
( c cdot 4: 2 )
D. 1:
11
431 The shape of gaseous ( S n C l_{2} ) is:
A . tetrahedral
B. linear
c. angular
D. T-shape
11
432 If the bond dissociation energies of
( X Y_{1} X_{2} ) and ( Y_{2} ) (all diatomic molecules)
are in the ratio of 1: 1: 0.5 and ( delta_{1} H ) for
the formation of ( X Y ) is ( -200 k J m o l^{-1} )
The bond dissociation energy of ( boldsymbol{X}_{2} ) will
be:
A. ( 200 k J ; / m o l )
в. ( 100 k J / m o l )
c. ( 800 k J / ) mol
D. 300kJ/mol
11
433 Polarisation of the electron cloud of
cation is less than anion because:
A. p/e ratio is more than one for anion
B. p/e ratio is less than one for cation
C. p/e ratio is more than one for cation by which electrons are relatively loosely held compared to anion
D. p/e ration is more than one for cation while less than one for anion by which electron cloud is relatively loosely held for anion
11
434 Explain hybridization of central atom in
( : I F_{7} )
11
435 Which of the following species are correctly matched with their geometries according to the VSEPR theory? This question has multiple correct options
A. ( B r F_{6}^{+} rightarrow ) octahedral
B . ( S n C l_{5}^{-} rightarrow ) trigonal bipyramidal
c. ( C l F_{2}^{-} rightarrow ) linear
D. ( I F_{4}^{+} rightarrow ) see-saw
11
436 The electronic configuration of elements ( A, B, C, D ) and ( E ) are as follows:
( begin{array}{llll}A(2,8,7) & B(2,8,1) & C(2) & D(2,end{array} )
6) ( quad E(2,8) )
The element which can donate electrons in a chemical reaction is:
( A cdot A )
B. B
( c cdot D )
D.
11
437 Which acid can combine with its own
salt?
A. ( H I )
в. ( H B r )
c. ( H C l )
D. ( H F )
11
438 ( ln s p^{3} d^{3} ) hybridisation, which orbitals are involved?
A ( cdot d_{x^{2}-y^{2}}, d_{z^{2}}, d_{x y} )
B . ( d_{x y}, d_{y z}, d_{z x} )
c. ( d_{x^{2}-y^{2}}, d_{x y}, d_{x z} )
D. ( d_{z^{2}}, d_{y z}, d_{z x} )
11
439 Assertion
Boron always forms covalent bond.
Reason
The small size of ( B^{3+} ) favours
formations of covalent bond.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
440 ( boldsymbol{H}_{2} boldsymbol{S} boldsymbol{e} ) is:
A. pyramidal
B. trigonal planar
c. linear
D. bent (v-shaped)
11
441 How many orbitals are singly occupied
in ( O_{2} ) molecule?
( A cdot 2 )
B.
( c cdot 3 )
D. 4
11
442 A covalent bond is formed when:
A. combining atoms share the electron pairs
B. combining atoms are attracted by each other
C. the ions of the combining atoms are attracted by electrostatic force of attraction
D. one atom donates a pair of electrons to another atom
11
443 Odd electron bond is present in:
A. ( N O )
в. ( N O_{2} )
c. ( C l O_{2} )
D. all of the above
11
444 Match the compounds (in List I) with the structure (in List II) 11
445 Find the number of pi bonding
molecular orbital from the following set if z the internuclear axis :
( boldsymbol{p}_{z} ) and ( boldsymbol{d}_{z^{2}}, boldsymbol{p}_{boldsymbol{x}} ) and ( boldsymbol{d}_{boldsymbol{x} z}, boldsymbol{d}_{boldsymbol{x} z} ) or ( boldsymbol{d}_{boldsymbol{y} z}, boldsymbol{d}_{boldsymbol{x} boldsymbol{z}} )
and ( boldsymbol{d}_{boldsymbol{y} boldsymbol{z}} )
11
446 Silver, gold, platinum, iron, copper and titanium are part of the:
A. minerals
B. transition element
c. salts
D. all of these
11
447 The bond between two identical non
metallic atoms has a pair of electrons:
A. unequally shared among the two atoms.
B. equally shared among two atoms
c. equal transfer of electrons from one atom to another
D. shared by only one atom.
11
448 Which of the following structure of a molecule is expected to have three bond pairs and one loan pair of electrons?
A . Octahedral
B. Trigonal planar
c. Pyramidal
D. Tetrahedral
11
449 Q.59 Match the compounds given in Column 1 W
on in Column I with the hybridisation and
shape given in Column II and mark the correct option.
Column 1 Column II
A. XeFo
1. spºd-distorted octahedral
B. Xeo 2. spd-square planar
c xeOFA 3. sp-pyramidal
D. XEFA 4. spd-square pyramidal
Codes
A B C D
A B C D
(a) 1 3 4 2
(b) 1 2 4 3
(c) 4 3 1 2
(d) 4 1 2 3
11
450 The bond order of a molecule is given by:
A. the difference between the number of electrons in
bonding and antibonding orbitals
B. total number of electrons in bonding and antibonding orbitals
C. twice the difference between the number of electrons in bonding and antibonding orbitals
D. half the difference number of electrons in bonding and antibonding orbitals
11
451 Select correct statement about valence-
bond approach
A. Each bond is formed by maximum overlap for its maximum stability
B. It represents localised electron model of bonding
c. Most of the electrons retain the same orbital locations
as in a separated atoms
D. All the above are correct statements
11
452 Which of the following Energy stabilise
the ( triangle boldsymbol{H}_{f} ) of ( boldsymbol{N a C l} ) the most?
A. Lattice Enthalpy
B. Bond dissociation Enthalpy
c. Electron Affinity Enthalpy
D. Ionisation Enthalpy
11
453 Among the following, the element which show inert-pair effect are :
This question has multiple correct options
( A cdot B i )
B. sn
( c cdot P b )
D.
11
454 If a polar covalent bond shows ( 50 % ) ionic character, then the electronegativity difference of the atoms that form the
bond is :
A. more than 1.7
B. equal to 1.7
c. less than 1.7
D. much greater than 1.7
11
455 toppr
Q Type your question.
them in a sequence.
(a) Thus, an electron pair is shared between ( C ) and ( C l . ) This is the Lewis
electron dot diagram for ( boldsymbol{C C l}_{4} )
(b) Write the symbol of chlorine and
represent its valence electrons with the help of crosses, that is,
(c) Write the symbol of carbon and represent its valence electrons with the
help of dots, that is,
(d) When carbon combines with four
chlorine atoms, the carbon atom contributes four electrons for sharing whereas each chlorine atom
contributes only one electron for
sharing. Thus, both the atoms in ( C C l_{4} )
attain an octet.
(c)
( A cdot a cot d )
B. b a c d
( c cdot d c b a )
( D cdot c b d a )
11
456 Assertion
Covalent bonds are broken when sugars
are dissolved in water.
Reason
In molecules with covalent bonds,
electrons are shared by two or more
atoms
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is incorrect but Reason is correct
D. Both Assertion and Reason are incorrect
11
457 The tiocyanate ion has a formula of
( S C N^{-} . ) When asked to draw the Lewis
Structure for thiocyanate, you came up with the following three drawings:
Which of the three drawings is/are correct?
( : ddot{mathrm{s}}=mathrm{c}=ddot{mathrm{n}}: quad ddot{mathrm{s}} equiv mathrm{c}-ddot{mathrm{N}}: )
( : ddot{mathrm{S}} )
This question has multiple correct options
A. The picture on the left is valid
B. The picture on the middle is valid
c. The picture on the right is valid
D. All three pictures are equally valid.
11
458 Assertion
( mathbf{S}_{2} boldsymbol{O}_{mathbf{7}}^{mathbf{2}-} )
( & C r_{2} O_{7}^{2-} ) both exist.
Reason
Both have same valence electrons.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is
not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
459 I: The sulfur in ( S O_{2}, ) is ( s p^{2} ) hybridized.
( |: S O_{2} ) has linear electron pair
geometry.
11
460 The bond dissociation energies of ( boldsymbol{H}- )
( boldsymbol{H}, boldsymbol{C}-boldsymbol{C} ) and ( boldsymbol{C}-boldsymbol{H} ) bonds
respectively are 104.2,83.1 and 98.8
kcal ( m o l^{-1} . ) The electronegativity of
carbon is:
A . 2.53
B . 2.51
c. 2.57
D. 2.52
11
461 Identify if the given Lewis structure is
correct
If correct enter 1 , else enter 0 .
11
462 Q32. Distinguish between a sigma bond and a pi bond. 11
463 Which of the following molecule/molecules will be have zero
dipole moment?
( boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{C} boldsymbol{O}_{2}, boldsymbol{C} boldsymbol{C l}_{4}, boldsymbol{C H} boldsymbol{C l}_{3}, boldsymbol{N} boldsymbol{H}_{3}, boldsymbol{B} boldsymbol{F}_{3}, boldsymbol{B} )
11
464 How many valence electrons are present in the Lewis structure of nitrogen?
A. 7
B. 5
( c cdot 3 )
( D )
11
465 The type of hybridisation present in
chlorine atom of ( C l O_{2}^{-} ) ion is:
( mathbf{A} cdot s p )
B . ( s p^{2} )
( c cdot s p^{3} )
D. ( d s p^{2} )
11
466 The type of bond between atoms of potassium and chloride in a crystal of potassium chloride is :
A. hydrogen bond
B. ionic bond
c. polar covalent bond
D. pure covalent bond
E. metallic bond
11
467 In compound ( X ), all the bond angles are
exactly ( 109^{circ} 28^{prime} . $ $ times $ $ ) is
A. Chloromethane
B. lodoform
c. Carbon tetrachloride
D. chloroform
11
468 A sample of hydrogen gas ( boldsymbol{H}_{2} ) is
irradiated by a light of ( lambda=432.25 A )
and all hydrogen after atomization gets excited to 3 rd orbit. Assuming no energy loss to the surroundings,
determine the bond energy of ( boldsymbol{H}_{2} ) in ( boldsymbol{k} boldsymbol{J} )
11
469 Which one of the following isomers of
( P B r C l_{3} ) have no dipole moment?
A. Only I
B. I and II
c. II and III
11
470 Which of the following species are hypervalent? ( 1 . C l O_{4}^{-}, 2 . B F_{3}, 3 . S O_{4}^{2-}, 4 . C O_{3}^{2-} )
( mathbf{A} cdot 1,2,3 )
в. 1,3
( c .3,4 )
D. 1,2
11
471 The type of overlapping in ( B r-F ) bond
in ( B r F_{3} ) molecule is:
A ( cdot s p^{3}-p )
B ( cdot s p^{2}-p )
( mathbf{c} cdot s p^{3} d-p )
( mathbf{D} cdot s p^{3} d^{2}-p )
11
472 We have all heard the phrase “opposites attract but like repels.” This is especially true for ionic compounds. Which one of the following has the largest lattice energy as a result of this attraction?
A . Licl
в. ( N a C l )
( mathrm{c} cdot K_{2} mathrm{O} )
D. ( M g C l_{2} )
11
473 Boron trifluoride ( left(B F_{3}right) ) has no dipole
moment ( (mu=0 D) . ) Explain how this
observation confirms the geometry of
( B F_{3} ) predicted by VSEPR theory.
11
474 Which of the above compounds will not
show enolisation?
( (mathbf{A}) )
(B)
( (mathrm{C}) )
( (mathbf{D}) )
his question has multiple correct options
( A cdot(A) )
в. ( (B) )
( c cdot(C) )
D. ( (D) )
11
475 Acetic acid is a dimer in benzene due
to:
A. condensation reaction
B. hydrogen bonding
c. presence of carboxylic group
D. presence of hydrogen atom at ( alpha ) -carbon
11
476 What is coordination number of oxygen
in ( boldsymbol{H}_{2} boldsymbol{O}(boldsymbol{l}) ? )
11
477 Which of the following species has a linear shape?
A. ( N O_{2} )
в. ( S O_{2} )
c. ( N O_{2}^{+} )
D. ( O_{2} )
11
478 HB H bond angle in ( B H_{4}^{-} ) is
A ( .180^{circ} )
B . ( 120^{circ} )
( c cdot 109^{circ} )
D. ( 90^{circ} )
11
479 The maximum number of covalent
bonds are present in:
A. ethane
B. methane
c. ethyne
D. ethene
11
480 Draw the electron dot structure for
oxygen molecule.
( A )
B.
( c )
D.
11
481 Some of the following properties are important in determining whether an element has metallic properties
I atomic number
II : atomic weight
III : number of valence electrons
IV : number of vacant atomic orbitals
V: total number of electronic shells in
the atom
Select correct properties from the codes given below
A. ।, I, I, III, IV
B. ।, ॥I, IV, v
c. ॥॥, IV
D. ( | ) II ( , ) IV, ( v )
11
482 How many maximum atoms of ( I F_{7} ) are
present in the same plane?
11
483 A : tetracyanomrthane
B : carbon
dioxide
C: benzene ( quad ) D : 1, 3-bute-di-
ene
Ratio of ( sigma ) and ( pi ) bonds is in order:
A. ( A=B<C<D )
в. ( A=B<D<C )
c. ( A=B=C=D )
11
484 Half the internuclear distance between
two atoms bonded by a single covalent
bond.
If true enter 1 , else enter 0
11
485 Among the following, which one option
have both ionic and covalent bonds?
( mathbf{A} cdot N H_{3} ) and ( N_{2} H_{4} )
B. ( ^{16} O ) and ( ^{17} O )
C ( . N H_{4} C l ) and ( N H_{4} N O_{3} )
D. ( C H_{3} O C H_{3} ) and ( C H_{3} C H_{2} O H )
( E cdot O_{2} ) and ( O_{3} )
11
486 Which of the following molecules are expected to exhibit intermolecular ( mathrm{H} ) bonding?
: Acetic acid II : ( o ) -nitrophenol Ill: ( m ) -nitrophenol IV: ( o ) -boric acid Select the correct option.
( mathbf{A} cdot ) ।, ॥।, ॥ ।
B. ।, ॥।, IV
c. ।, ॥ा, ।V
D. II, III, IV
11
487 Ammonia contains ( 82.65 % N_{2} ) and
( 17.65 % H_{2} . ) If the law of constant
proportions is true, then the mass of zinc required to give 10 g ammonia will be:
A. 8.265 g
в. ( 0.826 mathrm{g} )
c. ( 82.65 mathrm{g} )
D. 826.5 ( g )
11
488 Write the hybridization and draw the
shape of following ( boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{S} boldsymbol{F}_{6}, boldsymbol{P} boldsymbol{C l}_{5} )
11
489 Out of ( boldsymbol{S n C l}_{2}, boldsymbol{N C O}^{-}, boldsymbol{C S}_{2}, boldsymbol{N O}_{2}^{+} ) and
( S O_{2} ) select the one with linear
structure.
A. ( N C O^{-}, C S_{2}, N O_{2}^{+} )
B. ( N C O^{-}, S n C l_{2}, N O_{2}^{+} )
( mathrm{c} cdot S O_{2}^{-}, C S_{2}, N O_{2}^{+} )
D. None of these
11
490 In going from ( O_{2} ) to ( O_{2}^{+}, ) the bond
dissociation energy increases and bond length decreases. Do we expect the same behavior for the change ( N_{2} ) and
( N_{2}^{+} ? )
11
491 Which of the following combination does not form molecular orbitals?
( mathbf{A} cdot S+S )
в. ( P_{x}+P_{y} )
( mathrm{c} cdot P_{x}+P_{x} )
D. ( P_{z}+P_{z} )
11
492 Which of the following molecules/species have identical bond order and same magnetic properties?
(I) ( boldsymbol{O}_{2}(|) boldsymbol{N} boldsymbol{O}(| text { I }) boldsymbol{N}_{2}^{+} )
( A cdot(1),(11) ) only
B. (I) and (III) only
c. (I), (II) and (III)
D. (II) and (III) only
11
493 Shape of ( S e O_{2} ) molecule is
A. Triangular
B. Angular
c. Linear
D. pyramidal
11
494 Which of the following species is linear?
( mathbf{A} cdot X e F_{4} )
B . ( I_{3}^{-} )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. ( C l O_{2}^{-} )
11
495 In the following which of the two are paramagnetic
( (a) N_{2} )
( (b) C O )
( (c) B_{2} )
( (d) N O_{2} )
Correct answer is:
A. a and c
B. b and c
( c cdot c ) and ( d )
D. b and d
11
496 Covalent bonds are non-directional
bonds.
A. True
B. False
11
497 Use the MO theory to predict the bond order and the number of unpaired
electrons in ( O_{2}^{2-}, O_{2}^{-}, O_{2}, O_{2}^{+}, N O )
and ( C O )
11
498 Correct order at ( C ) -H bond dissociation
energy of following compound:
(।) ( boldsymbol{C} boldsymbol{H}_{3}-boldsymbol{H} )
(II) ( boldsymbol{C} boldsymbol{H}_{3}-boldsymbol{C} boldsymbol{H}_{2}-boldsymbol{H} )
( (| I) C H_{3}=C H-C H_{2}-H )
( (I V) C_{6} H_{5}-H )
( A cdot|>||>|||>mid V )
B. IV>|||> || > |
c. IV>1> || > |||
D. II>I>VI>III
11
499 . 18 Which of the following order of energies of molecular orbitals Or N21
correct?
(a) (12px) <(02p.) (02p> (ft 2px) = (1 2p)
(c) (nt2py) <(o2px) (o2p.) <(nt 2px) = (ft 2py)
A
TE
11
500 CO is isostructural with
This question has multiple correct options
( mathbf{A} cdot operatorname{Sn} C l_{2} )
( mathbf{B} cdot H g C l_{2} )
( mathbf{c} cdot S C l_{2} )
( mathbf{D} cdot Z n I_{2} )
11
501 Discuss the reactivity of an isolated alkene ( (C=C) ) and a carbonyl group
( (C=O) ) with a nucleophilic agent in
terms of MO theory.
11
502 Which of the following compounds do not have all ( C-C ) bonds of same
length?
( A )
B.
D.
11
503 Q. 29 Species having same bond order are
(a) N
(b) N;
(c) E
(d) 02
11
504 The strongest bond is present in:
A. ( B r_{2} )
В. ( I_{2} )
( c cdot C l_{2} )
D. ( F_{2} )
11
505 When two isomeric aromatic liquid compounds ( A ) and ( B ) having hydrogen bond, are heated. Compound A boils at a lower temperature than B.
Which statement is correct?
This question has multiple correct options
A. Intermolecular H bonding present in A
B. Intramolecular H bonding present in A and B both
c. Intramolecular H bonding present in B
D. Intramolecular H bonding present in A
11
506 If the boiling point of ethanol (molecular
weight -46 ) is ( 78^{circ} C, ) what is the boiling point of diethyl ether (molecular weight=74)?
( mathbf{A} cdot 100^{circ} C )
B . ( 70^{circ} mathrm{C} )
( mathbf{c} cdot 86^{circ} C )
D. ( 34^{circ} C )
11
507 If ( z ) is internuclear axis, then which type of overlapping is/are not possible? This question has multiple correct options
A ( . ) sand ( p_{x} )
B. ( s ) and ( p_{y} )
( mathbf{c} cdot p_{x}+p_{z} )
D. ( p_{y}+p_{z} )
11
508 Q.56 Match the shape of molecules in Column I with the type of hybridisation
in Column II.
Column 1 Column II
A. Tetrahedral 1. sp
B. Trigonal 2. sp
c. Linear 3. sp
To
11
509 Select the correct order of polarizing
power of cation.
( mathbf{A} cdot N a^{+}<M g^{2+}<S i^{4+}S i^{4+}>A l^{3+}>N a^{+} )
( mathbf{C} cdot N a^{+}<M g^{2+}<A l^{3+}<S i^{4+} )
( mathbf{D} cdot A l^{3+}<S i^{4+}<M g^{2+}<N a^{+} )
11
510 The shape of ( s p^{3} d^{2} ) hybridized molecule with 2 lone pairs will be:
A . octahedral
B. square pyramidal
c. square planar
D. tetrahedral
11
511 Which is the incorrect order for
compounds?
Compound ( : N H_{3}, P H_{3}, A s H_{3}, S b H_{3} )
A ( cdot N H_{3}>P H_{3}>A s H_{3}>S b H_{3}(text { Bond angle }) )
B . ( N H_{3}>P H_{3}>A s H_{3}>S b H_{3} ) (Bond energy)
C. ( N H_{3}>P H_{3}>A s H_{3}>S b H_{3} ) (Boiling point)
D. ( N H_{3}<P H_{3}<A s H_{3}<S b H_{3} ) (Reducing power)
11
512 In carboxylate ion ( left(C O O^{-}right), ) both ( C-O )
bond lengths are equal while in carboxyl ( operatorname{group}(-C O O H), ) both ( C-O ) bond
lengths are different, why?
11
513 The correct geometry and hybridization
for ( boldsymbol{X} boldsymbol{e} boldsymbol{F}_{4} ) are :
A . trigonal planar, ( s p^{3} d^{3} )
B. square planar, ( s p^{3} d^{2} )
c. octahedral, ( s p^{3} d^{2} )
D. trigonal bipyramidal, ( s p^{3} d )
11
514 The lattice energy of ( C a O(s) ) is ( -3460 mathrm{kJ} )
( mathrm{mol}^{-1} ; ) the lattice energy of ( boldsymbol{K}_{2} boldsymbol{O} ) is
( -2240 mathrm{kJ} mathrm{mol}^{-1} . ) This difference is
because ( K^{+}>C a^{2+}(text { size }), K^{+}< )
( C a^{2+}(text { charge }) )
If true enter 1 , else enter 0 .
11
515 Which of the following has ( boldsymbol{p} boldsymbol{pi}-boldsymbol{d} boldsymbol{pi} )
bonding?
A ( . N O_{3}^{-} )
в. ( S O_{3}^{2} )
( mathrm{c} cdot B O_{3}^{3-} )
D. ( C O_{3}^{2-} )
11
516 ( boldsymbol{P H}_{3} ) forms bubbles when passed slowly
in water but ( N H_{3} ) dissolves. Explain
why?
11
517 If a central atom of a molecule only has two electron domains, what is the only possible shape the molecule can have?
A. Linear.
B. Bent.
c. Pyramidal.
D. opposite.
11
518 On hybridisation of one ( s ) and one ( boldsymbol{p} )
orbitals we get:
A. two mutually perpendicular orbitals
B. two orbitals at ( 180^{circ} )
c. four orbitals directed tetrahedrally
D. three orbitals in a plane
11
519 An ionic bond ( A^{+} B^{-} ) is most likely to be
formed when:
A. the ionization energy of A is high and the electron affinity of B is low.
B. the ionization energy of A is low and the electron affinity of B is high.
c. the ionization energy of A and the electron affinity of is high
D. the ionization energy of A and the electron affinity of is low.
11
520 Which force opposes the inter ionic
forces of attraction between the
oppositely charged ions during the formation of an ionic crystal?
11
521 USD
(11
5
9. Which of the following molecules have zero dipole moment?
(a) CS,
(b) CO2
(c) CCI
(d) CH,C,
11
522 The bonding in ammonium chloride:
A. is covalent only
B. is electrovalent only
C. consists of three covalent nitrogen-hydrogen bonds and an electrovalent bond between the ammonia
molecule and the chlorine atom.
D. consist of four covalent nitrogen-hydrogen bonds and one electrovalent bond between the ammonium ion and chloride ion.
11
523 With the help of a suitable diagram show the formation of sodium chloride.
( left[begin{array}{cc}23 N a, & 35 C lend{array}right] )
11
524 Which one of the following is least volatile?
( mathbf{A} cdot H C N )
в. ( H F )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. ( C S_{2} )
11
525 A sigma bond is formed by the overlapping of
A. ( s-s ) orbital alone
B. ( s ) and ( p ) orbital alone
c. ( s-s, s-p ) or ( p-p ) orbital along internuclear axis
D. ( p-p ) orbital along the sides
11
526 Q. 3 The types of hybrid orbitals of nitrogen in NO, NO, and NH7 respectively
are expected to be
(a) sp, sp’ and sp?
(b) sp, sp and sp
(c) sp sp and sp
(d) sp?, sp and sp
11
527 Assertion
A sample of lead (II) bromide, ( P b B r_{2} )
was placed in a crucible. The ends of two carbon electrodes were put in the
solid and connected to a lamp and
power pack. At first the lamp did not
light, but when the bromide was heated and began to melt, the lamp began to glow. Explain these observations.
Reason
The glowing of lamp tells us that the compound conducts when in molten state in which there are ions which are
free to move. This also suggests that
( P b B r_{2} ) is ionic.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C . Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.
11
528 What is a lone pair of electrons,explain with suitable example? 11
529 Which of the following molecule having resonating electronic configuration?
( A cdot S O_{2} )
в. ( C_{2} H_{6} )
( c cdot C l_{2} )
D. ( H B r )
E . ( N a C l )
11
530 Which among the following has the largest dipole moment
A ( . N H_{3} )
в. ( H_{2} ) 0
c. ( H I )
( mathrm{D} cdot mathrm{SO}_{3} )
11
531 Draw electron dot representation for the formation of Sodium oxide. 11
532 What are the exceptions of the octet
rule?
A. The incomplete octet of central atom
B. An odd number of electrons on central atom
C. Expanded octet of the central atom
D. All of these
11
533 Which of the following has the longest covalent bond distance?
A ( . C=C )
в. ( C=H )
c. ( C=N )
D. ( C=O )
11
534 Which of the following species exhibit the paramagnetic behaviour? This question has multiple correct options
A . ( N O )
в. ( O_{2}^{2} )
( c cdot O_{2}^{+} )
D. ( O_{2} )
11
535 Q. 8 Number of ro bonds and o bonds in the following structure is
Н
HH
Biphenyl
(a) 6, 19
(b) 4,20
(c) 5,19
(d) 5, 20
11
536 Which of the following are diamagnetic? This question has multiple correct options
A ( cdot C_{2} )
B. ( O_{2}^{2} )
( mathrm{c} cdot mathrm{L} i_{2} )
D. ( N_{2}^{text {th }} )
11
537 The common feature among the species
( C N^{-}, C O ) and ( N O^{+} ) are:
A. bond order three and isoelectronic
B. bond order three and weak field ligands
c. bond order two and ( pi ) -acceptors
D. isoelectronic and weak field ligands
11
538 What is Bond formation?
A. always exothermic
B. always endothermic
C. neither exothermic nor endothermic
D. Sometimes exothermic and sometimes endothermic
11
539 For which of the following reaction, will
( triangle mathrm{H} ) be equal to ( triangle mathrm{E} ? )
( mathbf{A} cdot H_{2}(g)+frac{1}{2} O_{2}(g) rightarrow H_{2} O(l) )
B . ( H_{2}(g)+I_{2}(g) rightarrow 2 H I(g) )
( mathbf{c} cdot 2 N O_{2}(g) rightarrow N_{2} O_{4}(g) )
D ( cdot 2 operatorname{SO}_{3}(g) rightarrow 2 operatorname{SO}_{2}(g)+O_{2}(g) )
11
540 Acetic acid is a more volatile than
( boldsymbol{H}_{2} boldsymbol{C} boldsymbol{O}_{3} )
A. True
B. False
11
541 The correct order of increasing ( boldsymbol{C}-boldsymbol{O} )
bond length in ( C O, C O_{3}^{-2} ) and ( C O_{2} ) is:
A ( cdot C O_{3}^{-2}<C O_{2}<C O )
в. ( C O_{2}<C O_{3}^{-2}<C O )
c. ( C O<C O_{3}^{-2}<C O_{2} )
D. ( C O<C O_{2}<C O_{3}^{-2} )
11
542 ( Z n C O_{3} ) is thermally more stable than
( M g C O_{3} ) because:
A. ( M g(O H)_{2} ) exhibits only basic properties while ( Z n(O H)_{2} ) is amphoteric
B. polarising action of ( Z n^{2+} ) with 18 -electron configuration on the anion is larger than that of ( M g^{2+} ) with a noble-gas electron configuration and of same size and charge
( c . ) both
(a) and (b) are correct
D. none of the above is correct
11
543 Increasing order ofatomic/ionic size:
( boldsymbol{I}^{+}<boldsymbol{I}<boldsymbol{I}^{-} )
If true enter 1 , else enter 0 .
( A cdot 1 )
11
544 Which of the following is the decreasing order of their dipole moments?
A. ( N H_{3}>B F_{3}>N F_{3} )
B. ( N H_{3}>N F_{3}>B F_{3} )
c. ( B F_{3}>N H_{3}>N F_{3} )
D. ( B F_{3}>N F_{3}>N H_{3} )
11
545 Which of the following molecule/ion has a triangular pyramidal shape?
A. ( B F_{3} )
в. ( H_{3} O^{+} )
( mathbf{c} cdot N O_{3}^{-} )
D. ( C O_{3}^{2} )
11
546 VIZ. H, PO, can be represented by structures 1 and 2 shoon below. Can these two structures be
taken as the canonical forms of the resonance hubrid representing H,POZ? If not, give reasons
for the same.
H
H:0:P:0:H H:0:P:0:H
:o:
0:
(2)
Ans Natbocoon
11
547 Q. 12 If the electronic configuration of an element is 1s 2s 2p 3s 3p 3d 4s,
the four electrons involved in chemical bond formation will be
(a) 3p 3 (b) 3p%, 45² o t (c) 3p, 3d² ano (d) 3d², 45²
11
548 Which one is least ionic in the following compounds?
A. ( A g C l )
в. КСl
c. ( B a C l_{2} )
D. ( C a C l_{2} )
11
549 Which of the following is not correct?
A ( cdot N a^{+}+C l^{-} rightarrow N a C l )
B. ( N a^{+2}+2 F^{-} rightarrow C a F_{2} )
( mathbf{c} cdot N a^{+}+F^{-} rightarrow N a F )
D. ( C a^{2+}+2 N a^{+} rightarrow C a N a_{2} )
11
550 How many number of electrons are involved in the formation of a nitrogen
molecule?
A. Three
B. Four
c. Eight
D. six
11
551 Azide ion ( left(N_{3}^{-}right) ) exhibits on ( N-N )
bond order of 2 and may be represented by resonance structures I, II and III given below. ( overline{boldsymbol{N}}=dot{boldsymbol{N}}=overline{boldsymbol{N}}: longleftrightarrow^{2-}: ddot{boldsymbol{N}}-dot{boldsymbol{N}} equiv boldsymbol{N} )
( longleftrightarrow: N equiv vec{N}-ddot{N}:^{2-} )
( | )
Select correct statements
A. structures land II make greater contributions than ”
B. Structures II and III make smaller contributions than
c. structures land II make greater contributions than II
D. All the three structures make equal contributions
11
552 The correct statement is :
( mathbf{A} cdot B F_{3} ) is the strongest Lewis acid among the other boron halides
B. ( B I_{3} ) is the weakest Lewis acid among the boron halides
C. there is a maximum ( p pi-p pi ) back bonding in ( B F_{3} )
D. there is a minimum ( p pi-p pi ) back bonding in ( B F_{3} )
11
553 Explain the bond formation in sodium chloride. 11
554 Which of the following compound has a directional bond?
A. Magnesium chloride
B. Solid neon
c. Hydrogen sulphide
D. caesiun fluoride
11
555 To which of the following species, the octet rule is not applicable? This question has multiple correct options
A. ( B r F_{5} )
B. ( S F_{6} )
c. ( I F_{7} )
D. ( C O_{2} )
11
556 The non-metallic cation is present in:
A. ( C r O_{2} C l_{2} )
в. ( V O C l )
c. ( N H_{4} C l )
D. ( P C l_{3} )
11
557 Arrange the following species in order of increasing stability: ( boldsymbol{L} boldsymbol{i}_{2}, boldsymbol{L} boldsymbol{i}_{2}^{+}, boldsymbol{L} boldsymbol{i}_{2} )
A ( cdot L i_{2}^{+}<L i_{2}^{-}<L i_{2} )
c. ( L i_{2}<L i_{2}^{+}=L i_{2} )
D. ( L i_{2}^{+}=L i_{2}^{-}<L i_{2} )
11
558 Which of the following ions or molecules has a nonzero dipole moment?
A ( cdot C O_{2} )
в. ( N O_{3}^{-} )
( mathbf{c} cdot P O_{4}^{3-} )
D. ( S O_{2} )
E ( . S O_{4}^{2} )
11
559 Covalency of nitrogen in ammonium ion is:
A .2
B. 3
( c cdot 4 )
( D )
11
560 What is the total number of sigma bonds and pi bonds in the following
molecules? ( boldsymbol{C}_{2} boldsymbol{H}_{3} boldsymbol{C l}, boldsymbol{C H}_{2} boldsymbol{C l}_{2}, boldsymbol{H}_{3} boldsymbol{C}-dot{boldsymbol{C}}=stackrel{boldsymbol{H}}{boldsymbol{C}}- )
( boldsymbol{C} equiv boldsymbol{C}-boldsymbol{H} )
11
561 Which one form negative ions in an
ionic bond?
A. Alkali metalss
B. Alkaline earth metals
c. Noble gases
D. Halogens
E. Transition metals
11
562 Amongst the following the lowest degree of paramagnetism per mol of the compound at ( 298 mathrm{K} ) will be shown by:
A ( cdot ) FeSO( _{4} cdot 6 H_{2} ) O
в. ( N i S O_{4} .6 H_{2} O )
( mathrm{c} cdot mathrm{MnSO}_{4} cdot 4 mathrm{H}_{2} mathrm{O} )
D. ( C u S O_{4} .5 H_{2} O )
11
563 Out of given reaction which show
change in hybridisation of central
atom?
This question has multiple correct options
( mathbf{A} cdot H_{3} B O_{3} ) dissolve in water
B. ( H_{2} S O_{4} ) dissolve in water
( mathbf{C} cdot N_{2} O_{5(g)} rightarrow N_{2} O_{5(s)} )
D. ( P B r_{5(g)} rightarrow P B r_{5(s)} )
E ( cdot C_{2} H_{6} frac{text { Homolytic }}{text { bond cleavage of } C-C text { bond }} )
11
564 Number of ( boldsymbol{H} boldsymbol{C O}_{3}^{-} ) ions joined by ( boldsymbol{H}- )
bonding in ( boldsymbol{K} boldsymbol{H} boldsymbol{C O}_{3} ) is:
A. 5
B.
( c cdot 3 )
D.
11
565 Which has maximum number of H-
atoms per gram of the substance?
A ( cdot C H_{4} )
в. ( C u S O_{4}: 5 H_{2} O )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O}_{2} )
D. ( H_{2} O )
11
566 The nitrogen atoms in ( N H_{3}, N H_{2}^{-} ) and
( N H_{4}^{+} ) are all surrounded by eight electrons. When these species
are arranged according to ( H N H ) bond angle, the correct order is :
A ( . N H_{3}<N H_{2}^{-}<N H_{4}^{+} )
B. ( N H_{4}^{+}<N H_{2}^{-}<N H_{3} )
C ( . N H_{3}<N H_{4}^{+}<N H_{2}^{-} )
D. ( N H_{2}^{-}<N H_{3}<N H_{4}^{+} )
11
567 If true enter 1 , else enter 0 .
( H B r ) is stronger acid than ( H I ) due to
( boldsymbol{H} ) -bonding.
11
568 Q18. Out of bonding and antibonding molecular orbitals, which one has lower energy and which one
has higher stability?
ART. 1
11
569 The diamagnetic species is:
A . NO
в. ( N O_{2} )
( c cdot O_{2} )
D. ( C O_{2} )
11
570 Assertion
Chlorine reacts more rapidly with ( boldsymbol{H}_{2}, ) in
comparision to ( boldsymbol{O}_{mathbf{2}} )
Reason
( D-C l ) bond is stronger in comparison
to ( H-C l ) bond
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
571 During the developing process in photography, unexposed ( A g B r ) is washed away by complexation of ( A g(I) ) by sodium thiosulphate solution. These washings are often disposed of as waste. However, metallic silver can be
recovered from them by adding cyanide, followed by zinc. What is the hybridization of zinc is the complex formed during the recovery of silver?
A ( cdot s p^{3} d^{2} )
B ( cdot d^{2} s p^{3} )
( c cdot s p^{3} )
D ( cdot d s p^{2} )
11
572 toppr
Q Type your question
( A )
( B )
( c )
( D )
11
573 Which of the following is least ionic?
( mathbf{A} cdot A g C l )
в. ( K C l )
c. ( B a C l_{2} )
D. ( C a C l_{2} )
11
574 Which of the following hydrocarbons has the lowest dipole moment?
A. ( O F_{2} )
в. ( C H_{3} C equiv C C H_{3} )
c. ( C H_{3} C H_{2} C O O H )
D. ( C H_{2}=C H-C O O H )
11
575 Bond order of ( boldsymbol{B e}_{2} ) is:
A . 1
B. 2
( c cdot 3 )
D.
11
576 An element X has low ionization energy
and another element Y has high electron affinity. The bond formed
between them could be:
A . ionic
B. polar covalent
c. co-ordinate covalent
D. non polar covalent
11
577 Name the following:
a) An element which forms the triple
covalent bond.
b) An element which obtains the noble
gas configuration of neon by losing three electrons.
c) An element which gains two electrons to obtain the noble gas configuration of neon.
d) Name a compound which is an exception to the octet rule.
e) ( ln S O_{2} ) molecule, which element is a
donor of electrons.
11
578 The type of bond involved in the
formation of sodium chloride is:
A. ester bond
B. peptide bond
c. ionic bond
D. covalent bond
E. hydrogen bond
11
579 Depending on Lewis structure,
( O F_{2}, O_{2} F_{2} ) and ( S_{2} F_{2} ) which of the
following statement is incorrect?
( mathbf{A} cdot S_{2} F_{2} ) has two possible isomeric structures, whereas
( O_{2} F_{2} ) has only one
B. The bond angle in ( O F_{2} ) is greater than in ( O C l_{2} )
C. The O-O bond length in ( O_{2} F_{2} ) is smaller than in ( H_{2} O_{2} )
D. The O-F bond length in ( O_{2} F_{2} ) is larger than in ( O F_{2} )
11
580 Which of the hydrated species can
exist?
( boldsymbol{I}: boldsymbol{H}_{5} boldsymbol{O}_{2}^{+} boldsymbol{I I}: boldsymbol{H}_{3} boldsymbol{O}^{+} boldsymbol{I I I} )
( boldsymbol{H}_{3} boldsymbol{O}_{2}^{-} quad boldsymbol{I} boldsymbol{V}: boldsymbol{H}_{7} boldsymbol{O}_{3}^{+} )
Select alternate from:
A . II only
B. ( I ) and ( I I )
c. ( I, I I ) and ( I V )
D. ( I, I I, I I I ) and ( I V )
11
581 The bond order in ( N O ) is 2.5 while that
in ( N O^{+} ) is ( 3 . ) Which statement is true
for these two species?
A. Bond length is unpredictable
B. Bond length in ( N O ) is greater than in ( N O^{+} )
C. Bond length in ( N O^{+} ) is equal to that in ( N O )
D. Bond length in ( N O^{+} ) is greater than in ( N O )
11
582 7. Which one is diamagnetic among NO, NO and NOT?
(a) NO
(b) NO
– (c) NO
(d) None of these
In an3 en 2 anden hibridimod
bone
1
11
583 Bond length is maximum in:
Refer above image.
( A )
B.
( c )
( mathbf{C H}_{3}-ddot{mathbf{C}} mathbf{H}=stackrel{*}{mathbf{C}} mathbf{H}-mathbf{C H}_{3} )
D.
11
584 In monomeric ( B H_{3} ), let an axis
definition place the molecule in the ( x z )
plane. Which atomic orbital on ( B ) is non
bonding?
A ( cdot 2 s )
в. ( 2 p_{x} )
( c cdot 2 p_{y} )
D. ( 2 p_{z} )
11
585 Which of the following molecules will form a linear polymeric structure due to hydrogen bonding?
A. ( H C l )
в. ( H F )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. ( N H_{3} )
11
586 Which of the following has been arranged in order of decreasing dipole
moment?
A. ( C H_{3} C l>C H_{3} F>C H_{3} B r>C H_{3} I )
B. ( C H_{3} F>C H_{3} C l>C H_{3} B r>C H_{3} )
c. ( C H_{3} C l>C H_{3} B r>C H_{3} I>C H_{3} F )
D. ( C H_{3} F>C H_{3} C l>C H_{3} I>C H_{3} B r )
11
587 Which of the following orbital overlapping will form Pi bond?
( underbrace{1}_{s}+underbrace{bigcup_{s}}_{s} )
в.
( c )
( underbrace{S_{p_{v}}}^{y}+underbrace{V_{p_{y}}}_{V_{V}} )
D.
11
588 45 Predict the hybridisation of each carbon in the molecule of organic
compound given below. Also indicate the total number of sigma and
pi-bonds in this molecule.
0
0
CH=(-(-CH2-C
OH
fuo aivan below
11
589 2.40 What is the effect of the following processes on the bond order in N, and
02?
(a) N₂ N2 te
(b) 02- 07+e
11
590 State or True or False.
HCl is a gas while HF is a liquid at room temperature.
A. True
B. False
11
591 Which molecule pair do not have
identical structure
( mathbf{A} cdot I_{3}^{-}, B e F_{2} )
в. НС го( , ) ( , )О О( _{2} )
( mathbf{c} cdot B F_{3}, I C l_{3} )
D. ( B r F_{4}^{-}, X e F_{4} )
11
592 ( N_{2} ) molecule contains
and ( quad boldsymbol{pi}- ) bonds
A. one, four
B. three, two
c. one, two
D. none
11
593 If the element ( A ) has three electrons in
an outer shell and ( B ) has six electrons
in an outer shell, then the formula of the compound formed by these element will be:
A. ( A_{3} B_{2} )
в. ( A_{2} B_{3} )
( mathrm{c} cdot A B_{3} )
D. ( A_{6} B_{3} )
11
594 Write the valencies of ( X, Y ) in the
chemical compound having the following lewis notation.
11
595 The number of hydrogen bonds formed
by a molecule each of ( mathrm{H}_{2} mathrm{O}, mathrm{HF} ) and ( mathrm{NH}_{3} )
respectively are :
( mathbf{A} cdot 2,2,3 )
B. 4,2,3
c. 2,1,3
D. 4,4,3
11
596 Which of the following factor(s) affect bond length?
This question has multiple correct options
A. Size of atoms making the bond.
B. Bond order.
C. Oxidation number of central atom.
D. Percentage s-character in the orbitals used in making the bond.
11
597 In a covalent bond formation:
A. transfer of electrons takes place
B. equal sharing of electrons between two atoms takes place
C . electrons are shared by one atom only
D. electrons are donated by one atom and shared by both atoms.
11
598 Which of the following cannot exists on the basis of M.O. theory?
A. ( C_{2} )
в. ( H e_{2}^{+} )
c. ( H_{2}^{+} )
D. ( H e_{2} )
11
599 Equally shared between them Covalent
bond is present in
A. ( N a_{a} S )
в. ( A l C l_{3} )
c. ( N a H )
D. ( K_{2} ),
11
600 Which molecule/ion out of the following does not contain unpaired electrons?
A ( cdot N_{2}^{+} )
в. ( O_{2} )
( c cdot O_{2}^{2} )
D. ( B_{2} )
11
601 The nature of the chemical bond in MgO
is:
A. electrovalent
B. covalent
c. dative
D. polar covalent
11
602 Arrange the following in order of decreasing ( N-O ) bond length :
( N O_{2}^{+}, N O_{2}^{-}, N O_{3}^{-} )
A ( cdot N O_{3}^{-}>N O_{2}^{+}>N O_{2} )
в. ( N O_{3}^{-}>N O_{2}^{-}>N O_{2}^{+} )
c. ( N O_{2}^{+}>N O_{3}^{-}>N O_{2} )
D. ( N O_{2}^{-}>N O_{3}^{-}>N O_{2} )
11
603 Number of electrons transferred from
one atom to another during bond formation in SrS (Strontium Sulphide) is :
( A )
B. 2
( c cdot 3 )
( D )
11
604 A ‘breath test’ used by traffic police to check drunken driving uses ( _{–}–? ) 11
605 Which of the following has the highest bond order?
A ( . N_{2} )
в. ( O_{2} )
c. ( H e_{2} )
D. ( H_{2} )
11
606 State True or False.
Dipole moment of ( B H_{3} ) is zero.
A. True
B. False
11
607 select the correct statement ( (s): )
This question has multiple correct options
( mathbf{A} cdot ) When ( d_{x^{2}-y^{2}} ) or ( d_{x y} ) orbitals combine in parallel planes, then ( delta ) or ( delta ) molecular orbitals are formed.
B. When ( d_{x^{2}-y^{2}} ) or ( d_{x y} ) orbitals combine in parallel planes, then N.B.M.O. are formed.
C. When ( d_{y z} ) or ( d_{x z} ) orbitals combine in along the y-axis, then N.B.M.O. are formed.
D. No interaction is possible when ( p_{z} ) and ( d_{x z} ) orbitals overlap with collinear z-axis
11
608 Which type of bond forms on the transfer of electrons?
A. Ionic Bond
B. Metallic Bond
c. Hydrogen Bond
D. covalent bond
11
609 Which atoms in ( H_{2} O ) and ( C l F ) are
negatively charged?
A. ( O ) in ( H_{2} O ) and ( C l ) in ( C I F )
B. ( H ) in ( H_{2} O ) and ( F ) in ( C I F )
( mathrm{c} cdot O ) in ( H_{2} mathrm{O} ) and ( F ) in ( C I F )
D. None of the above is correct.
11
610 Dipole-induced dipole interactions are present in which of the following pairs:
A. HCl and He atoms
B. ( S i F_{4} ) and He atoms
c. ( H_{2} ) O and alcohol
D. ( C l_{2} ) and ( C C l_{4} )
11
611 Find the oxidation number of
Magnesium in Magnesium chloride.
( A cdot+1 )
B. –
( c cdot+2 )
( D cdot-2 )
11
612 Which of the following has least polarity in bond?
A ( . H-F )
в. ( H-C l )
c. ( H-O )
D. ( H-S )
11
613 The correct order of decreasing bond
energy is:
A. ( O-O>S-S>S e-S e )
в. ( C-C>S i-S i>G e-G e )
c. ( F-F>O-O>N-N )
D. ( F-F>C l>B r-B r )
11
614 Write the electron dot structure of
ethene molecule ( left(C_{2} H_{4}right) )
11
615 Intramolecular H-bonding is absent in:
A . o-methylbenzaldehyde
B. p-methoxybenzaldehyde
c. o-nitropheno
D. all of these
11
616 The structure of ( F_{2} S e O ) is analogous to:
A. ( S O_{3} )
в. ( C l O_{3}^{-} )
( mathrm{c} cdot mathrm{XeO}_{3} )
D. ( (B) ) and ( (C) ) both
11
617 Formation of anion from a neutral atom
( X ) is favoured by :
A. high electron affinity
B. large size of ( X )
c. low ionisation potential
D. high charge on anion ( X )
11
618 How many ( sigma ) and ( pi ) bonds are presents in
each of the following molecule?
(a) ( quad H C equiv C-C H=C H-C H_{3} )
( C H_{2}=C=C H-C H_{3} )
11
619 How many hydrogen bonded water molecules are associated with
( boldsymbol{C u} boldsymbol{S O}_{4} cdot boldsymbol{5} boldsymbol{H}_{2} boldsymbol{O} )
A. five
B. one
c. four
D. three
11
620 The number and type of bonds between two carbon atoms in calcium carbide
are :
A. one sigma, one pi
B. one sigma, two pi
c. two sigma, one pi
D. two sigma, two pi
11
621 Which of the following electronic configurations are associated with the formation of a molecule with expanded
octet?
This question has multiple correct options
A ( cdot[H e] 2 s^{2} 2 p^{1} )
B . ( [H e] 2 s^{2} 2 p^{2} )
C . ( [N e] 3 s^{2} 3 p^{3} )
D cdot ( [N e] 3 s^{2} 3 p^{4} )
11
622 The electron pair which forms a bond between two similar non – metallic
atoms will be ?
A. Dissimilar shared between the two
B. By complete transfer from one atom to other
c. In a similar spin condition
D. Equally shared in between the two
11
623 Bond order for ( C O ) is : 11
624 No. of double bond(s) present in the Lewis structure of ( C_{3}^{4-} ) is 11
625 In ( I C l_{4}^{ominus}, ) the shape is square planer. The number of bond pair-lone pair repulsion
at ( 90^{circ} ) are:
A. 6
B. 8
c. 12
D. 4
11
626 The magnitude of the lattice energy of a soild increases if:
A. the ions are large
B. the ions are small
c. the ions are of equal size
D. charges on the ions are smal
11
627 Among the following, the species with the highest bond order is:
( A cdot O_{2} )
B . ( F_{2} )
( c cdot O_{2}^{+} )
D. ( F_{2}^{-} )
11
628 Which one of the following is an
incorrect statement?
( A cdot A ) pi bond is formed when a sigma already exists.
B. A pi bond may be formed by the overlapping of p or d orbitals.
C. A pi bond is formed by the overlapping of hybrid orbitals.
D. A pi bond is formed by the lateral overlapping of atomic orbitals.
11
629 When ( 2 s-2 s, 2 p-2 p ) and ( 2 p-2 s )
orbitals overlap, the bond strength decreases in the order:
A ( cdot p-p>s-s>p-s )
В. ( p-p>p-s>s-s )
c. ( s-s>p-p>p-s )
D. ( s-s>p-s>p-p )
11
630 Q. 34 Structures of molecules of two compounds are given
s of two compounds are given below.
z
OH
(a) Which of the two compounds will have intermolecular hydrogen
bonding and which compound is expected to show intramolecular
hydrogen bonding?
(b) The melting point of compound depends on, among other things, the
extent of hydrogen bonding. On this basis explain which of the above
two compounds will show higher melting point?
(c) Solubility of compounds in water depends on power to form hydrogen
bonds with water. Which of the above compounds will form hydrogen
bond with easily and be more soluble in it?
11
631 The molecule/ion in which bond angle is
les than ( 109^{circ} ? )
( mathbf{A} cdot N F_{4}^{+} )
B. ( C C l_{4} )
c. ( C L O_{4} )
D. None of these
11
632 Explain the formation of ionic bond with a sutable example. 11
633 Which of the following has the minimum bond length?
( A cdot O_{2}^{+} )
B. ( O_{2} )
( c cdot o_{2}^{2} )
D. ( O_{2} )
11
634 Among the following bonds, which has the most polar character?
A ( . C-O )
в. ( C-B r )
c. ( C-F )
D. ( C-S )
11
635 How many bond pair and lone pair are there in ( C O_{3}^{2-} ? ) 11
636 In the compound ( boldsymbol{C H}_{2}=boldsymbol{C H}- )
( boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{C} equiv boldsymbol{C H}, ) the ( boldsymbol{C}_{2}-boldsymbol{C}_{3} )
bond is of the type.
A ( cdot s p-s p^{2} )
B ( cdot s p^{3}-s p^{3} )
( mathbf{c} cdot s p-s p^{3} )
D. ( s p^{2}-s p^{3} )
11
637 Calculate the ( % ) p-character in the orbital occupied by the lone pairs in water molecules:
[Given : ( angle H O H ) is ( 104.5^{circ} ) and ( cos ) ( (mathbf{1 0 4 . 5})=-mathbf{0 . 2 5}] )
A . ( 80 % )
B . 20%
c. ( 70 % )
D. 75%
11
638 The ( boldsymbol{H}-boldsymbol{C}-boldsymbol{H}, boldsymbol{H}-boldsymbol{N}-boldsymbol{H}, ) and
( H-O-H ) bond angles (in degrees) in
methane, ammonia and water are
respectively, closest to.
A. 109.5,104.5,107.1
в. 109.5,107.1,104.5
c. 104.5,107.1,104.5
D. 107.1,104.5,109.5
11
639 Draw the molecular orbital diagram of dioxygen and calculate bond order. 11
640 Which among of the following pairs has
the bond angle ( 109^{circ} 28^{prime} ? )
( mathbf{A} cdotleft[N H_{4}^{+}right],left[B F_{4}^{-}right] )
B ( cdotleft[N H_{4}^{+}right],left[B F_{3}right] )
C. ( N H_{3},left[B F_{4}^{-}right] )
D. ( left[N H_{3}right],left[B F_{3}right] )
11
641 How many delocalised ( pi ) – electrons are
there in the following compound?
( A )
B. 2
( c cdot 4 )
D.
11
642 2. The species CO, CN and N, are:
(a) isoelectronic
(C) having polar bond
(b) having coordinated bond
(d) having low bond energies
11
643 Paramagnetism of oxygen is explained on the basis of which of the following electronic configuration?
A ( cdotleft(2 pi^{*} p yright)^{1}left(2 pi^{*} p zright)^{1} )
B . ( left(2 pi^{*} p xright)^{1}left(2 pi^{*} p yright)^{1} )
C ( cdot(2 sigma p x)^{1}(2 pi p y)^{1} )
D. ( (2 sigma p y)^{1}(2 pi p y)^{1} )
11
644 Which species has the maximum number of lone pair of electrons on the
central atom?
A ( cdotleft[C l O_{3}right] )
в. ( X e F_{4} )
c. ( S F_{4} )
D. ( left[I_{3}right] )
11
645 Which of the following molecule has intramolecular H-bonding?
A. Ortho-nitrophenol
B. Ortho-boric acid
c. Both (a) and (b)
D. None of these
11
646 Compare and justify the dipole moment
of ( N H_{3} ) and ( N F_{3} )
11
647 Q. 27 Which of the following statements are correct about CO?
(a) The hybridisation of central atom is sp
(b) Its resonance structure has one C-o single bond and two CEO double bonds
(c) The average formal charge on each oxygen atom is 0.67 units
(d) All C-O bond lengths are equal
11
648 The eight species that follow all have covalent bonds. In which pair do the
species have different shapes from each other?
A. ( B e C l_{2} ) and ( C O_{2} )
B. ( C H_{4} ) and ( N H_{4}^{+} )
c. ( N H_{3} ) and ( B F_{3} )
D. ( S C l_{2} ) and ( H_{2} O )
11
649 Which is the correct order of increasing ionic nature of following molecules?
I. ( L i F )
Il. ( C l F_{3} )
III. ( boldsymbol{K}_{2} boldsymbol{O} )
IV. ( boldsymbol{S O}_{2} )
( A cdot||<|<| V<| )
B. II<IV<I<III
c. Ik IV<IIISI
11
650 The electronegativity of Caesium is 0.7 and that of Fluorine is ( 4.0 . ) The bond
formed between the two is
A. covalent bond.
B. electrovalent bond
c. coordinate bond.
D. metallic bond.
11
651 During the bond formation, energy is absorbed.
A . True
B. False
11
652 Which has zero dipole moment?
A . ( C l F )
в. ( P C l_{3} )
( mathrm{c} cdot operatorname{SiF}_{4} )
D. ( C F C l_{3} )
11
653 The electronegativities of nitrogen and chlorine are almost same. However,
( N H_{3} ) exists as liquid whereas ( H C l ) as
gas due to between the
molecules of ( boldsymbol{N} boldsymbol{H}_{3} )
A. van der Walls force of attraction
B. ionic bonding
c. H-bonding
D. dipole-dipole interaction
11
654 In the ( X e F_{4} ) molecule, the ( X e ) atom is
in the:
A ( cdot s p^{2} ) -hybridisation state
B. ( s p^{3} ) -hybridisation state
c. ( s p^{2} d ) -hybridized state
D. ( s p^{3} d^{2} ) -hybridized state
11
655 In case of formation of ionic
compounds, the electronegativity difference between them is less than 1.7
A. True
B. False
11
656 Among the following mixtures, dipoledipole as the major interaction is
present in :
A . ( K C l ) and water
B. benzene and carbon tetrachloride
c. benzene and ethanol
D. acetonitrile and acetone
11
657 Which of the following bonds is the most ionic?
A. ( C s-C l )
в. ( A l-C l )
c. ( C-C l )
D. ( H-C l )
11
658 Which is correct statement about ( sigma- )
and ( pi- ) molecular orbitals? Statements
are
(i) ( pi- ) bonding orbitals are ungerade
(ii) ( pi- ) antibonding orbitals are
ungerade
(iii) ( sigma- ) antibonding orbitals are gerade
( A cdot( ) i) only
B. (ii) and (iii) only
c. (iii) only
D. (ii) only
11
659 Which of the following is not
isostructural with ( S i C l_{4} ? )
( mathbf{A} cdot P O_{4}^{3-} )
B. ( N H_{4}^{+} )
( c cdot s C l )
( mathbf{D} cdot S O_{4}^{2-} )
11
660 The valency of nitrogen in ( N H_{3} ) is :
( A cdot 3 )
B. 4
( c .5 )
D.
11
661 Explain with the help of suitable example polar convalent bond. 11
662 Among the oxides of nitrogen:
( N_{2} O_{3}, N_{2} O_{4} ) and ( N_{2} O_{5} ; ) the
molecule(s) having nitrogen-nitrogen bond is/are:
A. Only ( N_{2} O_{5} )
B. ( N_{2} O_{3} ) and ( N_{2} O_{4} )
c. ( N_{2} O_{3} ) and ( N_{2} O_{5} )
D. ( N_{2} O_{4} ) and ( N_{2} O_{5} )
11
663 Coulomb’s law is used to calculate the
energy of an ion pair.
A. Gas law is used to calculate the energy of an ion pair.
B. Coulomb’s law is used to calculate the velocity of an ion pair
C. Coulomb’s law states that the potential energy (E) of interaction of two ions is directly proportional to the product of their charges and inversely proportional to the distance between them, so the statement is True
D. Ideal gas law is used to calculate the velocity of an ion pair.
11
664 Which of the following is not diamagnetic?
A. ( C_{2} )
B. ( O_{2}^{2} )
c. ( L i_{2} )
D. ( N_{2}^{text {th }} )
11
665 Which of the following set contains species having same angle around the
central atom?
A. ( S F_{4}, C H_{4}, N H_{3} )
B. ( N F_{3}, B C l_{3}, N H_{3} )
c. ( B F_{3}, N F_{3}, A l C l_{3} )
D. ( B F_{3}, B C l_{3}, B B r_{3} )
11
666 When you use a hair straightener, while straightening your hairs, it breaks down your hairs due to:
A. Electrostatic bonds
B. Hydrogen bonds
c. lonic bonds
D. Covalent bonds
11
667 Formation of ( N a C l ) is accelerated by
which of the following?
A. Individual octet attainment
B. High lattice enthalpy
c. stabilised solid crystal ( (F C C) )
D. All of the above
11
668 overlapping between
orbitals leads to ( pi ) bond formation.
11
669 Polarity of a bond depends on the difference in the electronegativity of the bonded atoms. The higher the difference in the electronegativity, the higher will be the polarity of the bond.

The boiling point of ( I C l ) is about ( 40^{circ} C )
higher than ( B r_{2} ). This might be because
A. ( I-C l ) bond is stronger than ( B r-B r ) bond
B. I.E. of ( IB r )

11
670 Is there any change in the hybridisation
of ( B ) and ( N ) atoms as a result of the
following reaction?
( boldsymbol{B} boldsymbol{F}_{3}+boldsymbol{N} boldsymbol{H}_{3} rightarrowleft[boldsymbol{F}_{3} boldsymbol{B} cdot boldsymbol{N} boldsymbol{H}_{3}right] )
11
671 In the formation of ( N_{2}^{+} ) from ( N_{2} ), the electron is removed from:
A. ( sigma ) orbital
B . ( pi ) orbital
( mathbf{c} cdot sigma^{*} ) orbital
D . ( pi^{*} ) orbital
11
672 ( I_{2} ) has less solubility in water, but its
solubility increases on adding ( K I ) in
the solution. When ( K I ) and ( I_{2} ) react,
then a species ( X ) is formed and
solubility of ( I_{2} ) solution increases.
The geometry of the anionic part of ( boldsymbol{X} )
is:
A. Linear
B. T-shape
c. Pyramidal
D. See-saw
11
673 Bond order is associated with the
strength of bond and bond length. The higher the bond order, the smaller will
be the bond length and stronger will be the bond.

Arrange ( O_{2}, O_{2}^{+}, O_{2}^{-} ) and ( O_{2}^{2-} ) in order of increasing bond order.
A ( cdot O_{2}<O_{2}^{-}<O_{2}^{2-}<O_{2}^{+} )
в. ( O_{2}^{2-}<O_{2}^{-}<O_{2}<O_{2}^{+} )
c. ( O_{2}^{-}<O_{2}^{2-}<O_{2}^{+}<O_{2} )
D. ( O_{2}^{2+}<O_{2}^{+}<O_{2}^{-}<O_{2} )

11
674 The ground state electronic
configuration of ( C O ) molecule is:
( mathbf{A} cdot 1 sigma^{2} 2 sigma^{2} 1 pi^{4} 3 sigma^{2} )
B ( cdot 1 sigma^{2} 2 sigma^{2} 3 sigma^{2} 1 pi^{2} 2 pi^{2} )
C ( cdot 1 sigma^{2} 2 sigma^{2} 1 pi^{2} 3 sigma^{2} 2 pi^{2} )
D. ( 1 sigma^{2} 1 pi^{4} 2 sigma^{2} 3 sigma^{2} )
11
675 The formal charge on central oxygen
( operatorname{atom} operatorname{in} O_{3} ) molecule is :
A . 0
B. +1
c. -1
D. – 2
11
676 Which of the following species has
planar geometry?
A ( cdot C l O_{2}^{-} )
в. ( N_{2} H_{4} )
c. ( C H_{2}=N H )
D. NF
11
677 Which of the following has highest bond dissociation energy?
( mathbf{A} cdot C H_{3}-F )
в. ( C H_{3}-C l )
c. ( C H_{3}-B r )
( mathbf{D} cdot C H_{3}-I )
11
678 Identify the correct statement from the
given alternatives.
A. Intra molecular hydrogen bonding is not found to occur in ( 2- ) hydroxy benzaldehyde
B. The boiling point of hydrogen iodide ( (H I) ) is more that hydrogen fluoride ( (H F) )
C. The dipole moment of ( C H_{3} C l ) is not equal to zero
D. ( C H_{3} F ) has a larger dipole moment that ( C H_{3} C l )
11
679 The hydrogen bridge is a
A. bond between two hydrogen atom
B. bond between two electro negative atom
C. bond between H-atom and two electronegative atom simultaneously.
D. none of these
11
680 Q. 23 Which of the following have identical bond order?
(a) CN-
(b) NO
(c) O2
(d) ož
11
681 Explain the formation of a chemical
bond.
11
682 2. The formation of covalent bonds in compounds exhibits
(a) wave nature of electron.
(b) particle nature of electron.
(c) both wave and particle natures of electron.
(d) none of these
(AIEEE 2002)
11
11
683 Given, ( C_{text {graphite }}+O_{2}(g) rightarrow )
( boldsymbol{C O}_{2}(boldsymbol{g}) ; boldsymbol{Delta}_{r} boldsymbol{H}^{o}=-boldsymbol{3} boldsymbol{9} boldsymbol{3} . boldsymbol{5} boldsymbol{k} boldsymbol{J} boldsymbol{m o l}^{-1} )
( boldsymbol{H}_{2}(boldsymbol{g})+frac{1}{2} boldsymbol{O}_{2}(boldsymbol{g}) rightarrow boldsymbol{H}_{2} boldsymbol{O}(l) ; boldsymbol{Delta}_{r} boldsymbol{H}^{o}= )
( -285.8 k J m o l^{-1} )
( boldsymbol{C O}_{2}(boldsymbol{g})+boldsymbol{2} boldsymbol{H}_{2} boldsymbol{O}(boldsymbol{l}) rightarrow boldsymbol{C} boldsymbol{H}_{4}(boldsymbol{g})+ )
( mathbf{2} boldsymbol{O}_{mathbf{2}}(boldsymbol{g}) ; boldsymbol{Delta}^{r} boldsymbol{H} mathbf{6} boldsymbol{o}=+mathbf{8} mathbf{9 0 . 3} boldsymbol{k} boldsymbol{J} boldsymbol{m o l}^{-1} )
Based on the above thermochemical
wquations, the value of Delt( a_{r} H^{o} ) at
( 298 K ) for the reaction,
( boldsymbol{C}_{(g r a p h i t e)}+mathbf{2} boldsymbol{H}_{2}(boldsymbol{g}) rightarrow boldsymbol{C} boldsymbol{H}_{4}(boldsymbol{g}) ) will be:
A. ( -78.8 k J ) mol ( ^{-1} )
B. ( +144.0 k J ) mol ( ^{-1} )
c. ( +74.8 k J ) mol ( ^{-1} )
D. – 144.0kJ mol ( ^{-1} )
11
684 Lattice energy of ionic compounds depend upon:
A. packing of ions only
B. charge and size of ions
c. charge on ion only
D. size of ions only
11
685 The ion that is isoelectronic with ( C O )
and has same bond order is:
A ( . C N^{-} )
B. ( O_{2}^{text {t }} )
( c cdot O_{2} )
D. ( N_{2}^{text {th }} )
11
686 The electronegative elements between which the H-bond is formed principally in aqueous ammonia are:
A. ( O, O )
B. ( N, N )
( c . O, N )
D. Both ( O, O ) & ( N, N )
11
687 This species has ( s p^{2} ) hybrid orbitals
A. ( B e F_{2} )
в. ( N H_{3} )
( mathrm{c} cdot mathrm{CH}_{4} )
D. ( C H_{2} C H_{2} )
E ( cdot C C l_{4} )
11
688 The high boiling point water is due to the presence of:
A. dative bond
B. covalent bond
c. hydrogen bond
D. vander waals bond
11
689 Acrolyn is the starting material for
certain plastics. CH and CO bonds are
polar. If true enter 1 , else 0
11
690 Hydridization of anionic part of ( boldsymbol{X} ) is:
( A cdot s p^{2} )
B . ( s p^{3} )
( mathrm{c} cdot s p^{3} d )
D. ( s p^{3} d^{2} )
11
691 2.5 Which of the following pairs of ions are isoelectronic and isostructural
(a) Co; -, NO; (b) CIO, což – (c) So-NOZ (d) CIO3 SO3
A
m
11
692 The shape of ( S C l_{2} ) molecule is:
A. linear
B. triangular
c. angular
D. pyramidal
11
693 How many bonds are there in
( mathbf{A} cdot 14 sigma, 8 pi )
B. ( 18 sigma, 8 pi )
( mathbf{c} cdot 19 sigma, 4 pi )
D. ( 14 sigma, 2 pi )
11
694 The number of electron pair shared between two atoms of same or different
elements during its formation of molecules is known as:
A. covalency
B. tetravalecy
c. bivalency
D. trivalency
11
695 Number of ( sigma ) and ( pi ) bonds in ( C_{2} )
molecule is/are:
( mathbf{A} cdot 1 sigma ) and ( 1 pi )
B. ( 1 sigma ) and ( 2 pi )
c. ( 2 pi ) only
D. ( 1 sigma ) and ( 3 pi )
11
696 Which of the following statements
is/are correct?
This question has multiple correct options
( mathbf{A} cdot N H_{2}^{+} ) shows ( s p^{2}- ) hybridisation whereas ( N H_{2} ) shows ( s p^{3}- ) hybridisation
B. ( A l(O H)_{4}^{-} ) has a regular tetrahedral geometry
( mathrm{C} cdot s p^{2}- ) hybridized orbitals have equal ( s- ) and ( p- ) character
D. Usually hybridized orbitals form ( sigma ) bonds
11
697 If ( N a^{+} ) ion is larger than ( M g^{2+} ) ion, and
( S^{2-} ) ion is larger than ( C l^{-} ) ion, which of the following will be less soluble in water?
A. ( N a C l )
B. ( N a_{2} S )
c. ( M g C l_{2} )
D. ( M g S )
11
698 Which of the following statements is
correct for ( boldsymbol{C} boldsymbol{s} boldsymbol{B} boldsymbol{r}_{3} )
A. It is covalent compound
B. It contains ( C s^{3+} ) and ( B r^{-} )
c. ।t contains ( C s^{+} ) and ( B r_{3}^{-} )
D. It contains ( C s^{+}, B r^{-} ) and lattice ( B r_{2} ) molecule
11
699 Explain why ( N_{2} ) has greater bond
dissociation energy than ( N_{2}^{+} ) whereas
( O_{2} ) has lesser bond dissociation energy
( operatorname{than} O_{2}^{+} )
11
700 Q10. Explain the diamagnetic behaviour of F, molecule on the basis of molecular orbital theory. 11
701 Q.60
(a) Discuss the significance/applications of dipole moment.
(b) Represent diagrammatically the bond moments and the resultant
dipole moment in CO2, NF, and CHCI 3.
Thenientiane at dinalo mamantare
11
702 The structure of ( X e F_{2} ) involves
hybridization of the type:
( A cdot s p^{3} )
B . ( d s p^{2} )
( c cdot s p^{3} d )
D. none of these
11
703 Calculate formal charge of atoms ( boldsymbol{H} boldsymbol{C l} boldsymbol{O}_{4}, boldsymbol{C O}_{3}^{2} ) 11
704 The correct order of the strength of ( boldsymbol{H}- ) bonds is:
A. ( H . . F>H . . O>H ldots N )
в. ( H . . N>H . . O>H ldots . )
c. ( H . . O>H . . N>H dots F )
D. ( H . . F>H . . N>H . . . O )
11
705 forms hydrogen bonds.
A ( cdot C H_{4} )
в. ( mathrm{CO}_{2} )
c. ( N H_{3} )
D. ( N_{2} )
( E cdot O_{2} )
11
706 Which of the following are isoelectronic and isostructural?
A ( cdot N O_{3}^{-}, mathrm{CO}_{3}^{2} )
B. ( S O_{3}, N O_{3}^{-} )
( mathrm{c} cdot mathrm{CO}_{3}^{-}, mathrm{CO}_{3}^{2} )
D. ( mathrm{CO}_{3}^{2-}, mathrm{SO}_{3} )
11
707 Magnetic moment ( 2.84 B M ) is given by
(Atomic numbers : ( boldsymbol{N} boldsymbol{i}=mathbf{2 8}, boldsymbol{T} boldsymbol{i}= )
( mathbf{2 2}, mathbf{C r}=mathbf{2 4}, mathbf{C o}=mathbf{2 7}) )
A ( cdot C r^{2} )
в. ( C o^{2} )
c. ( N i^{2} )
D. ( T i^{3} )
11
708 What is the dominant intermolecular
force or bond that must be overcome in
converting liquid ( C H_{3} O H ) to a gas?
A. London dispersion force
B. Hydrogen bonding
c. Dipole-dipole interaction
D. Covalent bonds
11
709 What is a lone pair of electrons? 11
710 Which one of the following has the highest bond order?
( A cdot O_{2} )
B. ( C H^{+} )
c. ( mathrm{c} )
D. ( C N )
11
711 Which of the following is a favourable factor for cation formation?
A. Low ionisation potential
B. High electron affinity
c. High electronegativity
D. Small atomic size
11
712 ( C_{2} ) and ( C_{3} ) atoms in ( C H equiv C-C H= )
( C H_{2} ) are respectively ( s p ) and ( s p^{2} )
hybridised.
A. True
B. False
11
713 Consider a chemical species in which a carbon atom forms single bonds to three hydrogen atoms in which the
carbon atom possesses no other
valence electrons.
(a) What formal charge would the
carbon atoms have?
(b) What shape would you expect this species to have?
(c) What is the hybridization of carbon atom?
11
714 Lewis dot symbol indicates the number of electrons of inner shell.
A. True
B. False
11
715 Assertion
( N H_{3} ) and ( C H_{3}^{-} ) both have pyramidal shape.
Reason
( mathrm{N} ) in ( N H_{3} ) and ( mathrm{C} ) in ( C H_{3}^{-} ) both have ( s p^{3} ) hybridisation with one lone pair of electron on each.
A. Assertion is true, Reason is true and Reason is correct explanation for Assertion.
B. Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion.
c. Assertion is true, Reason is false.
D. Assertion is false, Reason is true
11
716 Which of the following ions is mostly unlikely to exist?
A . ( L i )
B. ( B e^{2} )
c. ( B )
D. ( F )
11
717 What is the formal charge on chlorine in
the given lewis structure?
11
718 In the Lewis structure for the ( O F_{2} )
molecule, the number of lone pairs of electrons around the central oxygen atom is:
A . 1
B. 2
( c .3 )
( D cdot 4 )
11
719 If true enter 1 , else enter 0
Number of ( sigma ) -bonds in ( C(C N)_{4} ) are eight
( A )
11
720 Write short notes on synergic bonding. 11
721 Ramesh mixed some iron filings with
sulphur powder in a China dish. In
another dish, he mixed iron filings and
sulphur powder and heated the mixture.
Which of his observations is not
correct?
A. Dish ( X ) shows a physical change while dish ( Y ) shows chemical change.
B. In dish ( X ) sulphur powder and iron filings can be seen separately.
C. In dish ( Y ) a new substance is formed on heating the mixture.
D. The change which has taken place in dish ( Y ) is reversible
11
722 Which of the following compounds has zero dipole moment?
A. 1,4 – dichlorobenzene
B. 1, 2 – dichlorobenzene
c. 1,3 – dichlorobenzene
D. 1 – chloro – 2 – methyl benzene
11
723 During bond formation, potential energy
of the system:
A. increases
B. decreases
c. remains the same
D. cannot be predicted
11
724 What kind of compound is Sodium Chloride or ( N a C l )
A. Covalent Compound
B. Electrovalent Compound
c. Co-ordinate Covalent
D. None of these
11
725 ( C O_{2} ) is:
A . pyramidal
B. trigonal planar
C. linear
D. tetrahedral
11
726 Order of basic strength:
( mathbf{A} cdot A>B>C>D )
В ( . B>A>C>D )
( mathbf{c} cdot C>B>A>D )
( mathbf{D} cdot C>B>D>A )
11
727 The molecule which has zero dipole
moment is:
A ( cdot C H_{2} C l_{2} )
в. ( B F_{3} )
c. ( N F_{3} )
D. ( C l O_{2} )
11
728 The compound which is formed after sharing of a pair of electrons is called
A. ionic compound
B. atomic compound
c. covalent compound
D. None of these
11
729 The ( H F_{2}^{-} ) ion exists in the solid state and also in liquid HF solution, but not in dilute aqueous solution.
If true enter 1 , else enter 0
( A cdot 1 )
11
730 145 100
3. The axial overlap between the two orbitals leads to the formation of a
(a) sigma bond (b) pi bond (c) multiple bond (d) none of these
11
731 Give an example of the following:
A compound containing both ionic and covalent bonds.
11
732 Specify the co-ordination geometry
around and hybridization of ( N ) and ( B )
atoms in a 1: 1 complex of ( B F_{3} ) and
( boldsymbol{N} boldsymbol{H}_{3}: )
( mathbf{A} cdot N: ) tetrahedral, ( s p^{3} ; B: ) tetrahedral, ( s p^{3} )
B. ( N: ) pyramidal, ( s p^{3} ; B: ) pyramidal, ( s p^{3} )
C. ( N: ) pyramidal, ( s p^{3} ; B: ) planar, ( s p^{2} )
D. ( N: ) pyramidal, ( s p^{3} ; B: ) tetrahedral, ( s p^{3} )
11
733 Which of the following is/are diamagnetic?
This question has multiple correct options
A. Super oxide ion
B. Oxygen molecule
c. Carbon molecule
D. Nitrogen molecule
11
734 If true enter 1 , else enter 0
Both ( N ) and ( C l ) has almost same
electronegativity but later is not
involved in ( boldsymbol{H} ) -bonding.
( A cdot 1 )
11
735 How many lone pairs are present in the
( N_{2} O_{4} ? )
11
736 Which combination of atoms can form a
polar covalent bond?
A. Hand
B. Hand
c. ( mathrm{N} ) and ( mathrm{N} )
D. Na and F
11
737 In a regular octahedral molecule, ( M X_{6} )
the number of ( X-M-X ) bonds at an angle of
( 180^{circ} ) is
A. Three
B. Two
( c . ) six
D. Four
11
738 Q15. Although both Co, and H,O are triatomic molecules, the shape of H,O molecule is bent while
that of Co, is linear. Explain this on the basis of dipole moment.
11
739 Pick out the wrong statement about the
properties of covalent compounds.
A. They posses high melting and boiling points
B. They have poor thermal and electrical conductivity
C. They are generally soft or brittle
D. they have low enthalpies of fusion and vaporization
11
740 Draw Lewis structure for the following molecules.
¡) ( boldsymbol{S F}_{mathbf{6}} )
ii) ( C_{2} H_{4} )
iii ( N O_{2} )
11
741 Which of the following will form hydrogen bond between the molecules
of the substances?
A ( cdot C H_{4} )
в. ( H B r )
c. ( H C l )
D. ( H_{2} O )
E. ( H_{2} )
11
742 Which of the following statements is
not true regarding molecular orbital
theory?
A. The atomic orbitals of comparable energies combine to form molecular orbitals
B. An atomic orbital is monocentric while a molecular
orbital is polycentric.
C. Bonding molecular orbital has higher energy than antibonding molecular orbital
D. Molecular orbitals like atomic orbitals obey Aufbau principle for filling of electrons.
11
743 The structure of ( X e F_{2} ) and ( N H_{3} )
respectively are:
A . linear, see-saw
B. bent, see-saw
c. bent, tetrahedral
D. linear, pyramidal
11
744 State True or False.
Bond order is the measurement of bond
strength.
A. True
B. False
11
745 Dipoles are found in:
A. Water
B. Hydrogen bromide
C. Iron
D. Argon
E. Sodium chloride
11
746 Suggest a test to find the hardness of
water and explain its procedure
11
747 Which of the following oxides behaves as conductor or insulator depending upon the temperature?
A. ( T i O )
в. ( operatorname{si} 0_{2} )
( mathrm{c} cdot operatorname{Ti} 0_{3} )
D. ( M g O )
11
748 Arrange the following in increasing
lattice energy:
( boldsymbol{L} boldsymbol{i}_{2} boldsymbol{C} boldsymbol{O}_{3}, boldsymbol{N} boldsymbol{a}_{2} boldsymbol{C} boldsymbol{O}_{3}, boldsymbol{K}_{2} boldsymbol{C} boldsymbol{O}_{3} )
11
749 What types of bonds is/are present in each of the following molecule(s)? Calcium chloride
A. Covalent
B. lonic
c. Both ( A & B )
D. Neither A nor B
11
750 The process requiring the absorption of energy is:
A ( . F rightarrow F^{-} )
в. ( H rightarrow H^{-} )
c. ( C l rightarrow C l^{-} )
D. ( O rightarrow O^{2-} )
11
751 Number of unhybridised orbitals in vinyl acetylene are:
A . 3
B. 7
( c cdot 4 )
( D )
11
752 Assuming covalent bonding between Ca and ( O ) (though not), What is the
expected bond order of ( C a O ? )
A . 1
B . 2
c. 1.5
D. 0
11
753 Q22. Explain why BeH, molecule has a zero dipole moment although the Be-H bonds are polar.
1 TL
1900
11
754 Which of the following molecules does not posses a permanent electric dipole moment?
This question has multiple correct options
A ( . H_{2} )
в. ( S O_{2} )
( c cdot S O_{3} )
D. ( C S_{2} )
11
755 Lattice energy of an ionic compound depends upon:
A. charge on the ion and size of the ion
B. packing of ions only
c. size of the ion only
D. charge on the ion only
11
756 How many unpaired electrons are present in ( N_{2}^{+} )
( mathbf{A} cdot mathbf{1} )
B. 2
( c cdot 3 )
D. 4
11
757 Column-I contains four entries and
Column-II contains four entries. Entries
of Column-I are to be matched with
some entries of Column-II. One or more
than one entries of Column-I may have
matching with the same entries of
Column-II.
11
758 Numbers of geometric isomers of
( P B r_{2} C l_{3} ) molecule which have non-zero
dipole moment are:
11
759 What is the structure of ( $ $ P H_{-} 3 C I_{-} 2 $ )
( $ ? )
A. Trigonal bipyramidal with apical H atoms.
B. Square pyramidal with apical H atom
C. Trigonal bipyramidal with apical Cl atoms.
D. Square pyramidal with apical Cl atom
11
760 The highest boiling point among the hydrides of group 14,15,16 and 17 stands for:
A. ( H_{2} O )
в. ( H I )
c. ( P H_{3} )
D. ( operatorname{si} H_{4} )
11
761 A square planar complex is formed by hybridisation of which atomic orbital?
A ( cdot s, p_{x}, p_{y}, d_{y z} )
B. ( s, p_{x}, p_{y}, d_{x^{2}-y^{2}} )
( mathbf{c} cdot s, p_{x}, p_{y}, d_{z} )
D. ( s, p_{x}, p_{y}, d_{x y} )
11
762 Which molecule has no unshared
electron pairs?
A. ( H_{2} )
в. ( O_{2} )
c. ( N_{2} )
D. ( C O_{2} )
E. ( N H_{3} )
11
763 Br ( F_{3} ) is a liquid which considerably undergoes self ionization to form cationic and anionic species.
( 2 B r F_{3} rightleftharpoonsleft[B r F_{2}right]^{+}+left[B r F_{4}right]^{-} )
Based on ( V S E P R ) theory, how many
( 90^{circ} F-B r-F ) bond angles are
there in anionic species?
( A cdot 4 )
B. 5
( c cdot 3 )
D.
11
764 Determine bond order of ( N_{2}, N_{2}+, N_{2} )
and arrange in decreasing order of bond strength.Predict their magnetic character.
11
765 Which of the following statement is
correct for ( boldsymbol{C s B r _ { 3 }} ) ?
A. It is a covalent compound
B. It contains ( C s^{3+} ) and ( B r^{-} ) ions
c. It contains ( C s^{+} ) and ( B r_{3}^{-} ) ions
D. It contains ( C s^{+}, B r_{3}^{-} ) and lattice ( B r_{2} ) molecul
11
766 Out of
( boldsymbol{C H}_{2} boldsymbol{C l}_{2}, boldsymbol{C H}_{4}, boldsymbol{C C l}_{4}, boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{C H C l}_{3}, boldsymbol{d}- )
dichlorobenzene, ( o ) -cresol, ( p ) -xylene,
( S C l_{2}, B F_{3}, I B r ) and ( C H_{2} O, ) non zero
value of dipole moment are:
11
767 Find the number of delta bonding molecular orbital from the following set if ( z ) is the inter-nuclear axis :
( boldsymbol{d}_{boldsymbol{x}^{2}-boldsymbol{y}^{2}} ) and ( boldsymbol{d}_{boldsymbol{x} z}, boldsymbol{d}_{boldsymbol{x}^{2}-boldsymbol{y}^{2}} ) or ( boldsymbol{d}_{boldsymbol{x} boldsymbol{z}} )
11
768 Explain the formation of following compound:
CaO
( boldsymbol{C a}:[boldsymbol{A r}] boldsymbol{4 s}^{2} longrightarrow boldsymbol{C a}^{2+}[boldsymbol{A r}] quad boldsymbol{O}: )
( 1 s^{2} 2 s^{2} 2 p^{4} longrightarrow )
( boldsymbol{O}^{2-} mathbf{1} boldsymbol{s}^{2} mathbf{2} boldsymbol{s}^{2} mathbf{2} boldsymbol{p}^{boldsymbol{6}} quad boldsymbol{C} boldsymbol{a}^{mathbf{2}+}[boldsymbol{:} ddot{boldsymbol{O}}:]^{2-} )
If true enter 1 , else enter 0 .
11
769 Which of the following hydrogen bonds
are strongest in vapour phase?
A. HF…H
в. НF…нс
c. нсI…मС।
D. HF…H
11
770 Rearrangement of carbon skeleton of substrate is possible in which of the following reactions?
( boldsymbol{S}_{N} mathbf{1}, boldsymbol{S}_{N} mathbf{2}, boldsymbol{E} mathbf{1}, boldsymbol{E} mathbf{2}, boldsymbol{E} mathbf{1} mathbf{c} mathbf{B}, boldsymbol{S}_{N} mathbf{2} operatorname{Th}, boldsymbol{S}_{N} mathbf{2} )
Ar, EAS(Electrophilic aromatic substitution), electrophilic addition on alkenes, free radical substitution of
alkanes.
11
771 If the bond energies of ( mathrm{H}-mathrm{H}, mathrm{Br} ) -Br, and ( mathrm{H} ) Br are 433,192 and ( 364 mathrm{kJ} ) mol ( ^{-1} )
respectively, the ( triangle H^{0} ) for the reaction
( boldsymbol{H}_{2(g)}+boldsymbol{B} boldsymbol{r}_{2(g)} rightarrow 2 boldsymbol{H} boldsymbol{B} boldsymbol{r}_{(g)} ) is:
A . -261 k J)
B. +103 k
( c .+261 mathrm{kJ} )
D. -103 kJ
11
772 Hydrogen bond energy (per mole) is about:
A . 10 kcal
B. 10 Joules
c. 10 ergs
D. 10 ev
11
773 Q29. Considering X-axis as the internuclear axis which out of the following will not form a sigma
bond and why? (a) 1s and 1s (6) 1s and 2p, (c) 2p, and 2p, (d) 1s and 25
11
774 The hybridization of carbon atoms in
( boldsymbol{C}-boldsymbol{C} ) single bond of ( boldsymbol{C H} equiv boldsymbol{C}- )
( boldsymbol{C H}=boldsymbol{C H}_{2} ) is :
A ( s p^{3}-s p^{3} )
is ( s s p^{3}-s p^{3} )
B ( cdot s p^{2}-s p^{3} )
( mathbf{c} cdot s p-s p^{2} )
D. ( s p^{3}-s p )
11
775 Which of the following options represents the correct bond order?
A ( cdot O_{2}^{-}>O_{2}<O_{2}^{+} )
В ( cdot O_{2}^{-}O_{2}^{+} )
( mathrm{c} cdot O_{2}^{-}>O_{2}>mathrm{O}_{2}^{+} )
D. ( O_{2}^{-}<O_{2}<O_{2}^{+} )
11
776 ( s p^{3} d ) hybridisation results in:
A. a square planar molecule
B. an octahedron molecul
C. a trigonal bipyramid molecule
D. a tetrahedron molecul
11
777 A molecule of ( boldsymbol{H} boldsymbol{X} ) can form stronger
hydrogen bond than another molecule
( boldsymbol{H}_{2} boldsymbol{Y} . ) But ( boldsymbol{H} boldsymbol{X} ) boils at a lower
temperature than ( boldsymbol{H}_{2} boldsymbol{Y} ). Identify ( boldsymbol{H} boldsymbol{X} )
and ( H_{2} Y ) and give a reason for the
peculiar behavior.
11
778 In a molecule of phosphorus (V) oxide,
there are:
A. ( 4 P-P, 10 P-O ) and ( 4 P=O ) bonds
B. ( 12 P-O ) and ( 4 P=O ) bonds
c. ( 2 P-O ) and ( 4 P=P ) bonds
D. ( 6 P-P, 12 P-O ) and ( 4 P=P ) bonds
11
779 What is the shape of arsenic
pentachloride?
A. Trigonal planar
B. Octahedral
c. Trigonal bipyrimidal
D. Tetrahedral
11
780 Assertion
( left(C_{2} H_{5}right)_{3} N ) is less basic than
trimethylaine ( left(boldsymbol{C H}_{mathbf{3}}right)_{mathbf{3}} boldsymbol{N} )
Reason
Due to hyperconjugation of ( C_{2} H_{5} ) is
less than methyl.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is
not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
781 Number of ( sigma ) and ( pi ) -bonds in
( boldsymbol{C}_{6} boldsymbol{H}_{5} boldsymbol{C O O H} ) is:
A ( .13 sigma, 4 pi )
В. ( 14 sigma, 4 pi )
( mathrm{c} cdot 15 sigma, 4 pi )
D. ( 16 sigma, 4 pi )
11
782 In the reaction:
( boldsymbol{C H}_{3} boldsymbol{C N} frac{boldsymbol{H}_{3} boldsymbol{O}^{+}}{text {heat}} boldsymbol{C H}_{3} boldsymbol{C O O H} )
The hybridization state of the functional carbon changes from:
A ( cdot s p^{3} ) to ( s p^{2} )
B. ( s p^{2} ) to ( s p^{3} )
c. ( s p ) to ( s p^{2} )
D. ( s p^{2} ) to sp
11
783 Enthalpy of formation of ( boldsymbol{C}_{2} boldsymbol{H}_{mathbf{6}}= )
( -83 k J / m o l )
Enthalpy of sublimation of graphite = ( mathbf{7} 19 k J / m o l )
Enthalpy of bond dissociation of ( boldsymbol{H}_{2}= ) ( 435 k J / m o l )
( mathrm{C}-mathrm{H} ) bond enthalpy ( =414 k J / m o l )
Calculate the bond enthalpy of ( C-C )
11
784 Arrange the following in the decreasing order of hydrogen bonding.
( boldsymbol{C H}_{4}, boldsymbol{C H}_{3}-boldsymbol{O H}, boldsymbol{C H}_{3}-boldsymbol{F}, boldsymbol{C H}_{3}- )
( N H_{2} )
A ( cdot C H_{3},-O H>C H_{3}-N H_{2}>C H_{3}-F>C H_{4} )
в. ( C H_{3},-O H>C H_{3}-F>C H_{3}-N H_{2}>C H_{4} )
c. ( C H_{3},-F>C H_{3}-O H>C H_{3}-N H_{2}>C H_{4} )
D. ( C H_{4},>C H_{3}-F>C H_{3}-N H_{2}>C H_{3}-O H )
11
785 A mixture of sand and sulphur is
seprated by
A. Fractional crystallization from aqueous medium
B. Dissolving in ( C S_{2} ) and filtering.
c. Sublimation
D. Fractional distillation
11
786 Q. 24 Which of the following attain the linear structure?
(a) BeCl2
(b) NCO+
(c) NO,
(d) CS2
11
787 Which of the following factor generally favours electrovalency? This question has multiple correct options
A. Low charge on ions
B. High charge on ions
c. Large cation and small anion
D. Small cation and large anion
11
788 The correct statement regarding ( S O_{2} )
molecule is:
A. two ( p pi-d pi ) bonds
B. molecule has 2 lone pair, 2 ( sigma ) bonds and ( 2 pi ) bonds
c. two ( p pi-p pi ) bonds
D. one ( p pi-p pi ) bond and one ( p pi-d pi ) bond
11
789 What makes the boiling point of water abnormally high as compared to similar compounds?
A. Van der Waals forces
B. Hydrogen bonding
c. Polar covalent bonding
D. Dipole insulation
11
790 The Hydrogen bond is always formed
between the molecules of the same
substance.
A. True
B. False
11
791 Can we get hydrogen and oxygen by setting up an arrangement for passing current through distilled water? Why? 11
792 What are the types of hybridization in
( boldsymbol{C}_{3} boldsymbol{H}_{4} ? )
11
793 In the conversion of ( boldsymbol{O}_{2} longrightarrow boldsymbol{O}_{2}^{-} ) the
incoming electron goes to the orbital:
A ( cdot pi^{*} 2 p x )
B . ( pi_{2 p x} )
( mathbf{c} cdot sigma_{2 p z}^{*} )
( D cdot sigma_{2 p^{2}} )
11
794 Assertion
Molten potassium chloride is a good electrical conductor.
Reason
the melting process frees the ions in potassium chloride from their fixed positions in the crystal lattice.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
795 1
11
( left{begin{array}{l}= \ frac{1}{4}end{array}right. )
( mid begin{array}{c}- \ + \ ++end{array}+ )
( -quad- )
( quad+frac{j}{+} )
( left{begin{array}{l}– \ ++++++end{array}right. )
11
796 Another name for a strong electrostatic interaction is :
A. metallic
B. ionic
c. covalent
D. van der Waal
11
797 The decreasing order of bond dissociation energies of ( boldsymbol{C}-boldsymbol{C}, boldsymbol{C}-boldsymbol{H} )
and ( H-H ) bonds is:
A. ( H-H>C-H>C-C )
в. ( C-C>C-H>H-H )
c. ( C-H->C-C>H-H )
D. ( C-C>H-H>C-H )
11
798 The bond order of ( N O ) molecule
is
A . 1.5
B . 2.
c. 2.5
D. 3.0
11
799 Select pair of compounds in which both have different hybridization but have same molecular geometry.
A. ( B F_{3}, B r F_{3} )
B . ( I C I_{2}^{ominus}, B e C l_{2} )
c. ( B e C l_{3}, P C l_{3} )
D. ( P C l_{3}, N C l_{3} )
11
800 Q10. Arrange the following, according to increasing covalent nature.
NaCI, MgCI, AICI
11
801 The type of bonds present in ( boldsymbol{P} boldsymbol{H}_{4} boldsymbol{I} ) are:
A . ionic
B. covalent
c. coordinate
D. ( H- ) bond
11
802 Assertion
( O_{3} ) and ( N O_{2}^{-} ) are isoelectronic.
Reason
Bond angles of ( boldsymbol{O}_{3} ) and ( boldsymbol{N} boldsymbol{O}_{2}^{-} ) are ( mathbf{1 1 6 . 8}^{circ} )
and ( 115^{circ} ) respectively.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
803 Q2. Write Lewis dot symbols for atoms of the following elements: Mg, Na, 11
804 Q18. Explain with the help of suitable example polar covalent bond.
ΤΑΠ.
11.ca
11
805 The enolic for of acetone contains:
A. 9 -sigma, 1 pi-bond and 2 lone pairs
B. 8 -sigma, 2 pi-bond and 2 lone pairs
C. 10 -sigma, 1 pi-bond and 1 lone pair
D. 9 -sigma, 2 pi-bond and 1 lone pair
11
806 The shape of ( I F_{7} ) molecule is:
A. pentagonal bipyramidal
B. trigonal bipyramidal
c. octagonal
D. ( T ) – shape
11
807 UUTILIT
07. What do you mean by Dipole moment? Draw the dipole diagram of H.O.
broduct of maritudi
TI
11
808 The calculated bond order in ( boldsymbol{H}_{2}^{-} ) ion is:
( mathbf{A} cdot mathbf{0} )
в. ( 1 / 2 )
c. ( -1 / 2 )
D.
11
809 Q. 17 The bond between B and C will be
(a) ionic
(b) covalent
(c) hydrogen
01 (d) coordinate
11
810 When ( N_{2}^{+} ) is formed from ( N_{2}, ) bond
order is ( _{–}-_{-}- ) and when ( O_{2}^{+} ) is formed
from ( O_{2}, ) bond-order is
A. increases
B. decreases
c. increases, decreases
D. decreases, increases
11
811 In certain polar solvents ( boldsymbol{P} boldsymbol{C l}_{5} )
undergoes an ionisation reaction in
which ( C l^{-} ) ion leaves one ( P C l_{5} )
molecule and attaches itself to another
( 2 P C l_{5} rightleftharpoons P C l_{4}^{+}+P C l_{6}^{-} )
What are the changes in the geometrical shapes that occur in this ionisation?
A. Trigonal Bipyramidal to tetrahedral and octahedral
B. Trigonal Bipyramidal to pentagonal planar and square planar
c. Pentagonal planar to tetrahedral and octahedral
D. None of these
11
812 Octet rule is not valid for the which of
the following molecule?
A ( cdot C O_{2} )
B. ( N O )
( c cdot O_{2} )
D. ( P C l_{3} )
11
813 How many lone pairs of electrons are in
resonance of the given compound?
( A cdot 4 )
B. 2
( c cdot 3 )
D. 6
11
814 In which of the following process, the bond order increases and magnetic behaviour changes?
( mathbf{A} cdot N_{2} longrightarrow N_{2}^{+} )
B . ( C_{2} longrightarrow C_{2}^{+} )
c. ( N O rightarrow N O^{+} )
D. ( O_{2} rightarrow O_{2}^{+} )
11
815 Which of the following option w.r.t. increasing bond order is correct?
A ( cdot N O<C_{2}<O_{2}^{-}<H e^{+} )
в. ( C_{2}<N O<H e^{+}<O_{2}^{-} )
c. ( H e^{+}<O_{2}^{-}<N O<C_{2} )
D. ( H e^{+}<O_{2}^{-}<C_{2}<N O )
11
816 Calculate the electron gain enthalpy of fluorine atom using the following data.
All the values are in ( k J ) mol ( ^{-1} ) at ( 25^{circ} C )
( Delta boldsymbol{H}_{d i s s}left(boldsymbol{F}_{2}right)=mathbf{1 6 0}, boldsymbol{Delta}_{f} boldsymbol{H}(boldsymbol{N a F}(s))= )
( -mathbf{5 7 1}, ) ।.E. ( [boldsymbol{N a}(boldsymbol{g})]= )
( mathbf{4 9 4}, mathbf{Delta H}_{mathbf{v a p}}[mathbf{N a}(s)]=mathbf{1 0 1 .} ) Lattice
enthalpy of ( N a F(s)=894 ) Also, make Born – Haber’s cycle.
11
817 What is the shape of the covalent
molecule ( M X_{3} ? )
11
818 dipole moment?
( mathbf{A} )
B.
( c )
D.
11
819 Polarization may be called the distortion of the shape of an anion by an
adjacently placed cation. Which of the following statements is/are incorrect? This question has multiple correct options
A. Minimum polarization is brought about by a cation of low radius
B. A large cation is likely to bring about a large degree of polarization.
c. Maximum polarization is brought about by a cation of high charge.
D. A small anion is likely to undergo a large degree of polarization.
11
820 Consider the following molecules
( boldsymbol{I}: boldsymbol{O}_{2} )
( boldsymbol{I} boldsymbol{I}: boldsymbol{O}_{2}left(boldsymbol{A} boldsymbol{s} boldsymbol{F}_{6}right) )
( boldsymbol{I} boldsymbol{I} boldsymbol{I}: boldsymbol{K} boldsymbol{O}_{2} )
Choose the correct answer.
A. The correct decreasing bond order is ( I>I I I>I I )
B. The correct decreasing order of bond length is ( I I I> ) ( I>I I )
C. The bond strength of I is less than that of ( I I I )
D. Bond dissociation energy is highest in case of ( I I I )
11
821 Total number of lone pair of electrons in
( I_{3}- ) ion is :
A . 9
B. 12
( c .3 )
D. 6
11
822 ( pi ) -Bonding occurs in each of the
following except:
A. ( C O_{2} )
в. ( C_{2} H_{4} )
c. ( C N^{-} )
D. ( C H_{4} )
11
823 ( mathrm{n} P O_{4}^{-3} ) ion, the formal charge on the oxygen atom of ( boldsymbol{P}-boldsymbol{O} ) bond is :
( A cdot+1 )
B. – 1
c. -0.75
D. +0.75
11
824 Assertion
Bond order for both ( N O^{+} ) and ( N O^{-} ) is
( mathbf{2 . 5} )
Reason
( N O^{+} ) is more stable than ( N O^{-} )
Read the above assertion and reason and choose the correct option regarding
it.
A. Assertion is true, Reason is true and Reason is correct explanation for Assertion
B. Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion
c. Assertion is true, Reason is false
D. Assertion is false, Reason is true
11
825 Which of the following has a covalent
bond?
This question has multiple correct options
A ( . ) NaCl
в. ( H_{2} ) О
( c cdot O_{2} )
D. None of these
11
826 The stability of an ionic compound is mostly due to:
A. ionization energy
B. electron affinity
c. lattice energy
D. electronegativity
11
827 Among the following molecules/ions, ( C_{2}^{2-}, N_{2}^{2-}, O_{2}^{2-}, O_{2} )
which one is diamagnetic and has the shortest bond length?
A ( cdot C_{2}^{2} )
B . ( N_{2}^{2} )
( c cdot O_{2} )
D. ( O_{2}^{2} )
11
828 Assertion
( N_{2} O ) is represented by ( (i) N=N=O )
and
( (i i) N equiv N rightarrow O ) but later is more
stable.
Reason
The form
(ii) shows resonance.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
829 Which of the following does not obey 18 electron rule?
( mathbf{A} cdot C r(C O)_{6} )
в. ( F e(C O)_{5} )
c. ( V(C O)_{6} )
D. ( M n_{2}(C O)_{10} )
11
830 10. Which of the following has/have zero dipole moments?
(a) SO2, [Ni(CN),]?-, CCI.
(b) SO,, CO, SO,
(c) H2O2, NH3, HCl
(d) CH, CO,. [Ni(CN)
11
831 . 50 All the C-0 bonds in carbonate ion (CO) are equal in length. Explain
Thinking Process
11
832 Which of the following is incorrect for
( C_{2} ) molecule?
A. Its bond order is 2
B. Both bonds are ( pi ) bonds
c. one bond is ( sigma ) and other bond is ( pi )
D. It is diamagnetic
11
833 Which of the following molecule deviates from octet rule with respect to
central atom?
A ( . P C l_{3} )
в. ( H_{2} ).
c. ( N H_{3} )
D. ( X e F_{4} )
11
834 How many energetically equivalent resonance structures exist for the
oxalate dianion?
( A )
B. 2
( c .3 )
( D )
11
835 Is there any changes in the
hybridisation of ( B ) and ( N ) atoms as a result of the following reaction.
( boldsymbol{B} boldsymbol{F}_{3}+boldsymbol{N} boldsymbol{H}_{3} rightarrow boldsymbol{F}_{3} boldsymbol{B}-boldsymbol{N} boldsymbol{H}_{3} ? )
11
836 Draw lewis structures for the following molecules ( H C O O H . C O_{2}^{2-} ) 11
837 Select the correct alternate:
The geometry of ( H_{2} S ) and its dipole
moment are:
A. angular and non-zero
B. angular and zero
c. linear and non-zero
D. linear and zero
11
838 Which one of the following shows intramolecular ( boldsymbol{H}- ) bonding?
A ( . H_{2} )
B. o-Nitro phenol
c. ( H F )
D. ( C H_{3} ) СООН
11
839 Q23. Which out of NH3 and NF, has higher dipole moment and why?
A
NITT
11
840 ( ln C H_{3} C O O H ) molecule, the ( C-C )
bond is formed by:
A ( cdot s p^{3}-s p^{3} ) overlap
B. ( s p^{2}-s p^{2} ) overlap
c. ( s p^{3}-s p^{2} ) overlap
D. ( s p^{3}- ) sp overlap
11
841 Among the following species which two have a trigonal pyramidal shape?
(I) ( boldsymbol{N} boldsymbol{I}_{mathbf{3}} )
(II) ( I_{3}^{-} )
( (| I) boldsymbol{S} boldsymbol{O}_{3}^{2-} )
( (mathrm{IV}) N O_{3}^{-} )
A. ( I ) and ( I I I )
B. III and ( I V )
c. ( I ) and ( I V )
D. II and III
11
842 Expanded octets result in substances with more than an octet of valence
electrons resulting in non-traditional geometries of molecular compounds. Which of the following elements cannot form an expanded octet as the central atom?
A. Nitrogen
B. Phosphorus
c. sulfur
D. Chlorine
11
843 Which pair of substances will have the most similar geometry?
( A cdot S O_{3}, S O_{3}^{2-} )
в. ( S O_{3}, S O_{4}^{2-} )
( mathrm{c} cdot mathrm{SO}_{3}, mathrm{CO}_{3}^{2} )
D. ( S O_{4}^{2-}, C O_{3}^{2} )
11
844 Assertion
The experimentally determined ( N-F )
bond length in ( N F_{3} ) is greater than the
sum of the single bond covalent bond
radii of ( N ) and ( F )
Reason
( N ) and ( F ) both have high electron
density due to smaller atomic radii.
Thus, ( l p-b p ) repulsion increases bond-
length.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.t
11
845 Which of the following is ( s p^{3} ) -hybridized
( ? )
A ( cdot N H_{3} )
в. ( B e H_{2} )
c. ( P C l_{5} )
D. ( A l C l_{3} )
11
846 If true enter 1 , else enter 0 .
The bond strength increases as the number of lone pairs on neighbouring atoms increases.
A. 0
B.
c. none
D. both
11
847 Which is most ionic?
( A cdot P_{2} O_{5} )
B. ( M n O )
( mathrm{c} cdot mathrm{CrO}_{3} )
D. ( M n_{2} O_{7} )
11
848 Among the following, the molecule of highest dipole moment is:
A. ( C C l_{4} )
в. ( N H_{3} )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. ( C H C l_{3} )
E. ( B F_{3} )
11
849 Which has highest specific charge?
A ( . N a^{+}(text {mass } n o=23) )
В. ( M g^{2+}(text { mass } text {по}=24) )
C ( . A l^{+3}(text {mass } n o=27) )
D. ( S i^{+4}(text {mass } n o=28) )
11
850 The correct order for homolytic blood dissociation energies ( (Delta H ) in ( k c a l / m o l ) ) for
( boldsymbol{C H}_{4}(boldsymbol{A}), boldsymbol{C}_{2} boldsymbol{H}_{6}(boldsymbol{B}), boldsymbol{C H}_{3} boldsymbol{B r}(boldsymbol{C}) ) is
( mathbf{A} cdot C>B>A )
В. ( B>C>A )
c. ( C>A>B )
D. ( A>B>C )
11
851 Which of the following dissolves in ionic solvents?
A ( cdot C_{6} H_{6} )
в. ( C H_{3} O H )
c. ( C C l_{4} )
D. ( C_{5} H_{12} )
11
852 8. In sp”, spand sp hybridized carbon atom, the p character is maximum in:
(a) sp
(b) sp?
(c) sp
(d) all of the above have same p-character
11
853 Which of the following show
paramagnetism? This question has multiple correct options
A ( cdot N O_{2} )
B. ( N O )
( c cdot K O_{2} )
D. ( N a_{a} O )
11
854 An element ( X(2,8,2) ) combines
separately with ( N O_{3} ) and ( left(S O_{4}right)_{2} )
( left(P O_{4}right)_{3} ) radicals. Write the formulae of
the three compounds so formed. To which group of the periodic tables does the element ‘X’ belong? Will it form
covalent or ionic compound? Why?
11
855 Which combination is best explained by co-ordinate covalent bond?
( mathbf{A} cdot H^{+}+H_{2} O )
в. ( H_{2}+O_{2} )
( mathbf{c} cdot C l_{2}+H_{2} )
D. ( C l+C l )
11
856 03. What are the main postulates of Valence Shell Electron Pair Repulsion (VSEPR) theory
( The shape of a molecule danga.
L
ive around the
11
857 Which hybrid orbitals are used by carbon atoms in the following molecules?
( (a) C H_{3}-C H_{3} )
( (b) C H_{3}-C H=C H_{2} )
( (c) C H_{3}-C H_{2}-O H )
( (boldsymbol{d}) boldsymbol{C H}_{3}-boldsymbol{C H O} )
( (e) C H_{3} C O O H )
11
858 What is the bond angle in ( C l O_{2} ? )
A ( cdot 90^{circ} )
B. ( 118^{circ} )
( c cdot 105^{circ} )
D. ( 111^{circ} )
11
859 There is no hydrogen bonding in:
A . acetic acid
B. ammonia
c. ethyl alcohol
D. diethyl ether
11
860 ( K F ) combines with ( H F ) to form ( K H F_{2} )
The compound contains the species:
A ( cdot K^{+}, F^{-} ) and ( H^{*} )
B. ( K^{+}, F^{-} ) and ( H F )
c. ( K^{+} ) and ( left[H F_{2}right]^{-} )
D. ( [K H F]^{+} ) and ( F_{2} )
11
861 How many different types of hybridization are present in the given
compound? ( boldsymbol{H}_{3} boldsymbol{C}-boldsymbol{C} equiv boldsymbol{C}-boldsymbol{C} boldsymbol{H}_{3} )
11
862 Number of water molecules attached on
( C u^{2+} ) ion in ( C u S O_{4} cdot 5 H_{2} O ) is :
11
863 Which are true statements among the
following?
(1) ( P H_{5} ) and ( B i C l_{5} ) do not exist
(2) ( p, d ) bonds are present in ( S O_{2} )
(3) Electrons travel with the speed of
light
(4) ( S e F_{4} ) and ( C H_{4} ) have same shape
(5) ( I_{3}^{+} ) has bent geometry
A ( cdot 1,3 )
B. 1,2,5
( c cdot 1,3,5 )
D. 1,2,4
11
864 List the factor determine the type of
bond that will be formed between two
atom?
11
865 The number of sigma and pi bonds in benzene are:
( mathbf{A} cdot 6 sigma ) and ( 3 pi )
B. ( 12 sigma ) and ( 3 pi )
( mathbf{c} cdot 9 sigma ) and ( 3 pi )
D. ( 6 sigma ) and ( 6 pi )
11
866 In which of the following species, each atom carries same number of lone pair
electrons on it?
A ( cdot X e O_{4}^{2} )
в. ( X e F_{2} )
c. ( X e O_{6}^{4} )
D. ( O_{3} )
11
867 For geometric isomers of 3hexene:
A. M.P. is high and dipole moment high for trans
B. M.P. is low and dipole moment low for trans
c. M.P. is high and dipole moment low for trans
D. M.P. is low and dipole moment high for trans
11
868 Which of the following statements is
incorrect?
( mathbf{A} cdot ) Among ( O_{2}^{+}, O_{2}, ) and ( O_{2} ) the stability decreases as ( O_{2}^{-}>O_{2}^{+}>O_{2} )
B. ( H e_{2} ) molecule does not exist as the effect of bonding and anti-bonding orbitals cancel each other
( mathbf{c} cdot C_{2}, O_{2}^{2-} ) and ( L i_{2} ) are diamagnetic
D. ( ln F_{2} ) molecule, the energy of ( sigma_{2 p_{z}} ) is more than ( pi_{2 p_{x}} ) and
( pi_{2 p_{y}} )
11
869 ( ln I C I_{4}^{64} ) the shape is square planar.The number of bond pair-long repulsion at ( 90 mathrm{re} )
( A cdot 6 )
B. 8
( c cdot 12 )
D. 4
11
870 Draw the Lewis dot formula for ( boldsymbol{N} boldsymbol{H}_{3} )
How many unshared pairs of electrons
are in the outer shell of the central
nitrogen atom?
( mathbf{A} cdot mathbf{0} )
B.
( c cdot 2 )
D. 4
E. 6
11
871 When an element of very low
ionization potential reacts with an element of very high electron affinity, then :
A. a weak ionic bond is formed
B. a strong ionic bond is formed
c. a polar covalent bond is formed
D. no bond is formed
11
872 Which of the following combination will form an electrovalent bond?
A ( . P ) and ( C l )
B. ( N H_{3} ) and ( B F_{3} )
c. ( H ) and ( C a )
D. ( H ) and ( S )
11
873 If the statement is true enter 1 , else
enter 0
Repulsion between bond pair-bond pair electron is lesser than in between lone
pair-lone pair
11
874 ( mathbf{A} cdot C H_{2} C l_{2} )
( mathbf{B} cdot K_{2} S O_{4} )
( mathbf{c} cdot B e C l_{2} )
D. ( S O_{2} )
11
875 In ethane ( C_{2} H_{6}, ) C-C forms:
A. sigma bond
B. pibond
c. covalent bond
D. electrovalent bond
11
876 Calculate the number of molecules of
( H F ) which are contained in gaseous
form due to hydrogen bonding if the
density of ( H F ) is gaseous phase at 1 ( operatorname{atm}, 300 K ) is 3.248 g/litre?
11
877 Contains carbon that are ( s p^{2} )
hybridized:
( mathbf{A} cdot C_{2} H_{5} )
B. ( C_{2} H_{4} )
c. ( C_{2} H_{2} )
D. ( C_{2} H_{5} O H )
E ( cdot C_{3} H_{8} )
11
878 Which of the following orbital
overlapping is not possible according to
VBT?
( A )
B.
( c )
D. All of these
11
879 Water has maximum density at ( 4^{circ} C )
If true enter 1 , else enter 0 .
( A )
11
880 Which of the following species exhibits diamagnetic behaviour?
A . ( N O )
в. ( O_{2}^{2} )
( c cdot O_{2}^{+} )
D. ( O_{2} )
11
881 Out of ( N H_{3}, P H_{3} ) and ( A s H_{3} ) boiling
point of ( N H_{3} ) is maximum and that of
( P H_{3} ) is minimum.
If true enter 1 , else enter 0
( A )
11
882 Although the hydrogen bonding in hydrogen fluoride is much stronger
than in water, yet water has a much higher boiling point than hydrogen fluoride. Explain.
11
883 During the formation of sodium chloride, sodium transfers one electron
to chlorine to attain the configuration of which noble gas?
A. Neon
B. Argon
c. Helium
D. Krypton
11
884 Which one of the following is the correct set with respect to molecule,
hybridization and shape?
A. ( B e C l_{2}, s p^{2} ), linear
B . ( B e C l_{2}, s p^{2}, ) triangular planar
c. ( B C l_{3}, s p^{2} ), triangular planar
D. ( B C l_{3}, s p^{3} ), tetrahedral
11
885 Which of the following shapes of ( S F_{4} ) is
more stable and why?
(i)
A. (i) Lone pair at axial position is stable
B. (ii) Lone pair at equatorial position is stable
c. Both are equally stable due to ( l p ) -bp repulsion
D. Both are unstable since ( S F_{4} ) has tetrahedral shape
11
886 In which of the following species the bonds are non directional?
A ( cdot N C l_{3} )
B. ( R b C l )
c. ( B e C l_{2} )
D. ( B C l_{3} )
11
887 Q.53 Match the species in Column I with the geometry/shape in Column II.
Column 1 Column II
A. H30* 1. Linear
B. HC=CH 2. Angular
с. СIO; 3. Tetrahedral
D, NH
4. Trigonal bipyramidal
5. Pyramidal
11
888 What does a Lewis dot diagram allow
you to show?
This question has multiple correct options
A. The valence electrons in an atom
B. All of the electrons in an atom
C. The valence protons in an atom
D. The neutrons, protons and electrons in an atom
E. How an atom bonds with other atoms
11
889 Explain the important aspects of
resonance with reference to the ( boldsymbol{C} boldsymbol{O}_{3}^{2-} )
ion.
11
890 Which of the following occurs, when two hydrogen atoms bond with each other?
A. Potential energy is lowered
B. Kinetic energy is lowered
c. Electronic motion creases
D. Energy is absorbed
11
891 lonic compounds does not exits as molecules.
A. True
B. False
11
892 The hybridization of ( I C l_{2}^{-} ) and ( C l O_{4}^{-} ) respectively are:
( mathbf{A} cdot s p^{3} d^{2}, s p^{3} )
B. ( s p^{2}, s p^{3} d )
c. ( s p^{3} d, s p^{3} )
D. None of these
11
893 From the electronic configurations, one
can predict that the geometric configuration for which of the following
molecules is not correct?
( mathbf{A} cdot P F_{3}, ) trigonal planar
B. ( C F_{4} ), tetrahedral
( mathbf{C} cdot C H C l_{3}, ) irregular tetrahedron
D. ( O F_{2} ), bent (v-shaped)
E . ( H F ), linear
11
894 Transfer of electrons from one atom to
other atom takes place in:
A. covalent bond
B. ionic bond
c. co-ordinate covalent bond
D. none of these
11
895 Which one is correct for stability order of given diatomic molecules?
A. ( H_{2}>B_{2}>L i_{2} )
В. ( H_{2}>L i_{2}>B_{2} )
( mathbf{c} cdot B_{2}>L i_{2}>H_{2} )
D. ( L i_{2}>B_{2}>H_{2} )
11
896 In acetylene, there are
(two/four) ( pi ) – bonding electrons
between carbon atoms.
11
897 The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is:
A . 1
B . 2
( c .3 )
D. 4
11
898 Identify the correct Lewis symbol from the following:
( A )
[
cdot mathrm{C}
]
в. ( bullet dot{O} )
( c )
[
mathbf{B}
]
( D )
( mathbf{N} )
11
899 According to Molecular Orbital Theory:
This question has multiple correct options
A ( cdot C_{2}^{2-} ) is expected to be diamagnetic
B. ( O_{2}^{2+} ) is expected to have a longer bond length than ( O_{2} )
C. ( N_{2}^{+} ) and ( N_{2}^{-} ) have the same bond order
D. ( H e_{2}^{+} ) has the same energy as two isolated He atoms
11
900 The observed dipole moment of ( H C l ) is 1.3 ( D ). If the bond length of ( H C l ) is ( 1.3 dot{A} )
then percentage ionic character of ( boldsymbol{H}- )
( C l ) bond is nearly :
(Charge on electron ( =4.8 times 10^{-10} ) esu)
A . ( 50 % )
B . ( 40 % )
( c .30 % )
D. ( 17 % )
11
901 Assertion: ( B_{2} ) molecule is diamagnetic.
Reason: The highest occupied molecular orbital is of ( sigma ) type.
A. Assertion and Reason are true and the Reason is a correct explanation of the Assertion
B. Assertion and Reason are true but Reason is not a correct explanation of the Assertion
c. Assertion is true but Reason is false
D. Both the Assertion and Reason are false
E. Assertion is false but the Reason is true
11
902 Which of the following statements
is/are true?
This question has multiple correct options
A. The strength of ( H- ) bond depends upon the polarity of the bond.
B. The extent of ( H- ) bond depends upon the number of sites available for ( H- ) bond.
C. The extent of ( H- ) bond in ( H_{2} O_{2} ) is greater than that in
( H_{2} O )
D. The strength of ( H- ) bond in ( H_{2} O_{2} ) is greater than that in ( H_{2} O )
11
903 Q8. What is meant by bond pairs of electrons? 11
904 The hybridisation of atomic orbitals of
( N ) in ( N O_{2}^{+}, N O_{3}^{-} ) and ( N H_{4}^{+} ) are respectively:
A ( cdot s p, s p^{2}, s p^{3} )
В ( . s p, s p^{3}, s p^{2} )
( mathbf{c} cdot s p^{2}, s p, s p^{3} )
D. ( s p^{2}, s p^{3}, s p )
11
905 A covalent bond is formed by:
A. transfer of electrons.
B. sharing of electrons by only a single atom.
C. sharing of electrons.
D. repulsion of atoms between two atoms.
11
906 Which one of the following has the regular tetrahedral structure?
A ( . B F_{4}^{-} )
в. ( S F_{4} )
c. ( X e F_{4} )
D. ( left[N i(C N)_{4}right]^{2} )
11
907 The correct sequence of increasing covalent character is represented by :
A ( cdot operatorname{Becl}_{2}< ) Nacl ( < ) Lic
B. NaCI<LiCI <BeCla
( mathrm{c} cdot mathrm{BeCl}_{2}<mathrm{LiCl}<mathrm{NaCl} )
D. LiCI<NaCI<BeCI
11
908 State whether the statement is true or
false:
Na is more stable than ( N a^{+} )
11
909 Consider the structure pictured above,
including the accompanying ligand.
Which of the following CORRECTLY
identifies the pictured compound by
name, and identifies the bonding
involved in its structure?
A. The compound is ammonium dichromate. It contains both ionic and covalent bonds.
B. The compound in diammonium chromate. It contains both ionic and covalent bonds.
C. The compound is ammonium dichromate. It contains only ionic bonds.
D. The compound is ammonium chromate. It contains ionic bond.
11
910 For ( N_{3}^{-} ) which statement is wrong.
A . Iso electronic with ( C O_{2} )
B. ( N H_{2} O H ) and ( N_{3}^{-} ) have same O.N. on nitrogen atom
c. N-N bond length are same
D. ( H N_{3} ) have linear shape
11
911 Calculate the energy required to excite one litre of hydrogen gas at 1 atm pressure and ( 298 mathrm{K} ) to the first excited
state of atomic hydrogen. The energy for the dissociation of H-H is 436 kJ ( m o l^{-1} )
A. ( 0.585 K J )
В. ( 5 times 10^{23} e V )
c. ( 80.36 K J )
D. none of these
11
912 ( K F ) combines with ( H F ) to form ( K H F_{2} )
The compound contains the species:
A ( cdot K^{+}, F^{-} ) and ( H^{+} )
B. ( K^{+}, F^{-} ) and ( H F )
c. ( K^{+} ) and ( left[H F_{2}right]^{-} )
D. ( [K H F]^{+} ) and ( F_{2} )
11
913 The melting point of a material with low binding energy is:
A . high
B. low
c. infinity
D. negative
11
914 The correct electronic configuration of
neutral ( C a ) and ( O ) are respectively:
( mathbf{A} cdot C a:[A r] 4 s^{2} )
( O:[H e] 2 s^{2} 2 p^{4} )
B . ( C a:[A r] 3 s^{2} )
( O:[H e] 2 s^{2} 2 p^{5} )
( mathbf{c} cdot operatorname{Ca}:[A r] 4 s^{2} )
( O:[H e] 2 s^{2} 2 p^{6} )
( mathbf{D} cdot operatorname{Ca}:[A r] 4 s^{2} )
( O:[H e] 2 s^{2} 2 p^{2} )
11
915 Bond energy is maximum in?
A. ( O-O )
B. ( C equiv C )
c. ( C equiv N )
D. ( N equiv N )
11
916 Hydrogen bonding is maximum in
A. diethyl ether
B. triethyl amine
c. ethanol
D. None of these
11
917 The nodal plane in the ( pi ) bond of ethene
is located in:
A. the molecular plane.
B. a plane parallel to the molecular plane.
C . a plane perpendicular to the molecular plane, which bisects the carbon-carbon sigma bond at right angle.
D. a plane perpendicular to the molecular plane, which contains the carbon – carbon s-bond.
11
918 Explain the term with example:Covalent
bond.
11
919 The ( C-O-C ) bond angle in diethyl
ether is:
( mathbf{A} cdot 109^{circ} 28 )
B. ( 110^{circ} )
( c cdot 120^{circ} )
D. ( 180^{circ} )
11
920 Which of the following statement is not true about covalent compounds?
A. They may exhibit space isomerism
B. They have low melting and boiling points
c. They show ionic reactions
D. They show molecular reactions
11
921 Given the correct order of initials T or ( F )
for the following statements. Use T if the statement is true and ( F ) it is false.
Statement-1: ( pi ) bond is formed by
sidewise overlapping of ( boldsymbol{d}_{boldsymbol{x}^{2}-boldsymbol{y}^{2}} ) and ( boldsymbol{p}_{boldsymbol{y}} )
orbital along x-axis. Statement-2: Zig-zag geometry would be suggested for the ( left[boldsymbol{I}(boldsymbol{C} boldsymbol{N})_{2}right]^{-} )
A. T,
в. F,
c. न, न
D. F,
11
922 Bond order of ( boldsymbol{O}_{2}, boldsymbol{O}_{2}^{+}, boldsymbol{O}_{2}^{-} ) and ( boldsymbol{O}_{2}^{2-} ) is in
order
A ( cdot O_{2}^{-}<O_{2}^{2-}<O_{2}<O_{2}^{+} )
B. ( O_{2}^{2-}<O_{2}^{-}<O_{2}<O_{2}^{-} )
c. ( O_{2}^{+}<O_{2}<O_{2}^{-}<O_{2}^{2} )
D. ( O_{2}<O_{2}^{+}<O_{2}^{-}<O_{2}^{2} )
11
923 ( A, B, ) and ( C ) are three elements with
atomic number ( 6,11, ) and 17
respectively. Which of these cannot
form ionic bond and why?
11
924 In the series ethane, ethylene and
acetylene, the ( C-H ) bond energy is:
A. the same in all the three compounds
B. greatest in ethane
c. greatest in ethylene
D. greatest in acetylene
11
925 In ( 1- ) butene number of ( sigma ) – bonds is:
A . 8
B. 10
c. 11
D. 12
11
926 The formal changes on the oxygen atoms in an ozone molecule, from left to
right, are ( _{text {一一一一一一一一一 }} ) respecting
A. +1,0,-1
B. 0,+1,-1
c. -1,0,+1
D. 0,-1,+1
11
927 The type of bond formed by ( C a ) with ( O ) is:
A. ionic
B. covalent
c. coordinate
D. none of these
11
928 Ionic reactions are
A . fast
B. slow
c. very slow
D. medium
11
929 Which of the following compounds can form ( boldsymbol{H} ) -bonding with each other?
A. ( C H_{3} C O O H ) and ( H_{2} O )
B. Phenol and ( C H_{4} )
( mathrm{c} cdot C H F_{3} ) and acetone
D. ( P H_{3} ) and ( H F )
11
930 Which of the following compounds has a zero dipole moment?
A. 1,1 – Dichloroethylene
B. cis-1,2-Dichloroethylene
c. trans- 1,2 – Dichloroethylene
D. None of the above
11
931 where ( X, Y, Z ) are atoms of different
elements with different
electronegativities, are shown below.
The molecules are regular
tetrahedral species. Assume the bond
lengths in all the structures to be the
same.
Identify the pair(s) of structures of
molecules in which both the members
have the same magnitude of dipole
moment.
A. I and III
B. Il and v
c. IV and vı
D. I and ( V )
11
932 What kind of compound is ( C a O ) or Calcium Oxide.
A. Covalent compound
B. Electrovalent compound
c. Co-ordinate covalent compound
D. None of these
11
933 Which of the following is the correct
statement for the molecule, ( boldsymbol{C} boldsymbol{s} boldsymbol{I}_{3} ? )
A. It is a covalent molecule
B. It contains ( C s^{+} ) and ( I_{3}^{-} )
c. It contains ( C s^{3+} ) and ( I^{-} )
D. It contains ( C s^{+}, I_{3}^{-} ) and lattice ( I_{2} ) molecule
11
934 What is giant molecules? 11
935 ( A X_{4} ) forms square planar type
structure. Distance between A and X
atoms is 4 units, then distance between
two ( X ) atoms in trans position is:
11
936 Which one of the following has no unpaired electrons?
( A cdot O_{2} )
в. ( O_{2}^{-} )
( c cdot O_{2}^{+} )
D. ( O_{2}^{-} )
11
937 The shape of Ammonium ion is:
A. tetrahedron
B. pyramid
c. square planar
D. square pyramid
11
938 Which of the following statement(s) is/are correct?

As the s-character of a hybrid orbital decreases,
(1) the bond angle decreases
(II) the bond strength increases
(III) the bond length increases
(IV) the size of orbital increases
( A cdot(1),(11) ) and (IV)
B. (I), (III) and (IV)
c. (।) and (II)
D. (I), (II), (III) and (IV)

11
939 The correct order of decreasing polarity
¡s:
( mathbf{A} cdot H F>S O_{2}>H_{2} O>N H_{3} )
B ( cdot H F>H_{2} O>S O_{2}>N H_{3} )
( mathbf{c} cdot H F>N H_{3}>S O_{2}>H_{2} O )
( mathbf{D} cdot H_{2} O>N H_{3}>S O_{2}>H F )
11
940 Among ( N H_{3}, H_{2} ) and ( H F ) which would
you expect to have the highest magnitude of hydrogen bonding and why?
11
941 The bond between hydrogen and fluorine
in a molecule of hydrogen fluoride. ( boldsymbol{H} boldsymbol{F} )
is sometimes considered an ionic bond
and other times is considered a
covalent bond.
What is the reason for this confusion?
A. The electronegativity difference between the two atoms is not high enough to be considered an ionic bond even though ( H ) is a metal.
B. The hydrogen atoms is sometimes considered a metal and in other considered a non-metal.
C. The electronegativity difference between the two atoms is high enough to be considered an ionic bond even though ( H ) is a non-metal.
D. The fluorine atoms are sometimes considered a metal and in other times considered a non-metal.
11
942 D. 2 Polarity in a molecule and hence the dipole moment depends primarily on
electronegativity of the constituent atoms and shape of a molecule. Which
of the following has the highest dipole moment?
(a) CO2
(b) HI
(c) H2O
(d) SO,
11
943 Select the molecule that has one
pi bond?
This question has multiple correct options
( mathbf{A} cdot C H=C H )
B. ( C H_{2}=C H-C H O )
c. ( C H_{3}-C H=C H_{2} )
D. ( C H_{3}-C H=C H-C O O H )
11
944 Choose the incorrect statements.
This question has multiple correct options
A. All ( S-F ) bond lengths are identical in ( S F_{4} )
B. All ( C l-F ) bond lengths are identical in ( C l F_{3} )
C . All ( angle F C l F ) angles are not identical in ( C l F_{3} )
D. All possible angle in ( B F_{2} C l ) are ( 120^{circ} )
11
945 The ( C-H ) bond in propane is:
A ( cdot sigma s p-s )
B ( cdot operatorname{csp}^{2}-s )
c. ( sigma p-s )
D. ( sigma s p^{3}-s )
11
946 Q11. Explain the important aspects of resonance with reference to the CO3 10. 11
947 as shown below is correct, but some of the bonds are shown
Q20. The skeletal structure of CH2COOH as shown below is correct, but some
incorrectly. Write the correct Lewis structure for acetic acid.
H :o:
H=C-C-0-H
H
11
948 If pure “p” orbitals are involved in molecule formation, then the shape of
( boldsymbol{H}_{3} boldsymbol{O}^{+} ) will be:
A. pyramidal
B. tetrahedral
c. angular
D. planar
11
949 Using valance bond theory, explain the type of hybridisation of the following given below:
( left[M n(C N)_{6}right]^{3-},left[C oleft(N H_{3}right)_{6}right]^{3+},left[C rleft(H_{2} Cright.right. )
11
950 The ( B C l_{3} ) is a planar molecule whereas
( N C l_{3} ) is pyramidal, because:
A. ( B-C l ) bond is more polar than ( N-C l ) bond
B. ( N-C l ) bond is more covalent than ( B-C l ) bond
c. nitrogen atom is smaller than boron atoms
D. ( B C l_{3} ) has no lone pair but ( N C l_{3} ) has a lone pair of electrons
11
951 Draw electron dot representation for the
formation of ( boldsymbol{C}_{2} boldsymbol{H}_{2} )
11
952 Which of the following molecular orbitals has two nodal planes?
A ( cdot sigma 2 s )
в. ( pi 2 p_{y} )
( mathbf{c} cdot pi^{*} 2 p_{y} )
D. ( sigma^{*} 2 p_{x} )
11
953 Which of the following is not a typical property of an ionic compound?
A. High melting point.
B. Conducts electricity in the molten and in the aqueous solution state.
C. They are insoluble in water
D. They exist as oppositely charged ions even in the solid state
11
954 Dipole moment of ( C O ) is very small
( (0.1 D) ) (in-spite of the larger difference in electronegativity between ( C text { and } O) ) and negative end of the dipole lies near
the less electronegative ( C ) -atom. It is
due to:
A. occupation of anti-bonding molecular orbitals
B. occupation of empty ( d ) – orbitals
c. occupation of lone-pairs
D. occupation of the lone pairs as well as empty ( d- ) orbitals
11
955 Which of the following factors are
responsible for origination of van der
Waals forces?
This question has multiple correct options
A. Instantaneous dipole-induced dipole interaction.
B. Dipole-induced dipole interaction and ion-induced dipole interaciton.
C. Dipole-dipole interaction and ion-induced dipole interaction.
D. Small size of molecule.
11
956 Which combination will give the strongest covalent bond?
A ( cdot K^{+} ) and ( C l^{-} )
B. ( K^{+} ) and ( O^{2} )
c. ( C a^{2+} ) and ( C l^{-} )
D. ( C a^{2+} ) and ( O^{2} )
11
957 Among ( boldsymbol{C a} boldsymbol{H}_{2}, boldsymbol{B} boldsymbol{e} boldsymbol{H}_{2}, boldsymbol{B} boldsymbol{a} boldsymbol{H}_{2}, ) the order
of ionic character is
A. ( B e H_{2}<B a H_{2}<C a H_{2} )
в. ( B e H_{2}<C a H_{2}<B a H_{2} )
c. ( B a H_{2}<B e H_{2}<C a H_{2} )
D. ( C a H_{2}<B e H_{2}<B a H_{2} )
11
958 A, ( B, ) and ( C ) are three elements with
atomic number ( 6,11, ) and 17
respectively. Which of these cannot form covalent bond and why?
11
959 Fluorine molecules is formed by:
( mathbf{A} cdot ) the axial ( p-p ) orbital overlap
B. the sideways ( p ) -porbital overlap
C . the ( s-s ) orbital overlap
D. the ( s-p ) orbital overlap
11
960 What will be the atomic number of an
atom with an electron dot arrangement
similar to : ( I: ? )
( mathbf{A} cdot mathbf{1} )
B. 6
( c cdot 9 )
D. 10
E . 14
11
961 The ( boldsymbol{P}-boldsymbol{P}-boldsymbol{P} ) angle in ( boldsymbol{P}_{4} ) molecule
and ( S-S-S ) angle in ( S_{8} ) molecule is (in degree) respectively:
A ( cdot 60^{circ}, 107^{circ} )
В . ( 107^{circ}, 60^{circ} )
( mathbf{c} cdot 60^{circ}, 108^{circ} )
D. ( 60^{circ}, 40^{circ} )
11
962 In which crystal system, the length of each stage (edge length) is same?
A ( . ) BaSO ( _{4} )
в. Нg S
( c cdot operatorname{cas} O_{4} )
D. ( Z n O )
11
963 Statement I: The most important factor in determining the chemical properties of an element is the number of electrons
in the outermost shell.

Statement II: The number of electrons in
the outer shell determines the bonding characteristics of the element.
A. Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement
B. Both the Statement 1 and Statement 2 are correct and statement 2 is NOT the correct explanation of Statement
c. statement 1 is correct but Statement 2 is not correct
D. statement 1 is not correct but Statement 2 is correct
E. Both the Statement 1 and Statement 2 are not correct

11
964 When drawing Lewis dot structures, what should you do if you run out of electrons before all atoms are satisfied?
A. Leave it as is.
B. Try double or triple bonds
c. Make a resonance structure
D. Add the missing electrons
11
965 ( N a+C l rightarrow N a^{+}+C l^{-} rightarrow N a^{+} C l^{-} )
(2,8,1)(2,8,7)(2,8)(2,8,8)
The above equation represents the
formation of sodium chloride. Observe
the equation and answer the following:
a) How many electrons are transferred
from ( N a ) to ( C l ? )
b) Name the force acting between ( N a^{+} )
and ( C l^{-} )
c) Name the nearest noble gas to ( C l^{-} )
d) Name the bond between ( N a^{+} ) and
( boldsymbol{C l}^{-} )
e) How many electrons are present in
( N a^{+} ) ion?
11
966 The enthalpy changes at ( 298 mathrm{K} ) in successive breaking of ( boldsymbol{O}-boldsymbol{H} ) bonds of
HOH are:
( boldsymbol{H}_{2} boldsymbol{O}(boldsymbol{g}) rightarrow boldsymbol{H}(boldsymbol{g})+boldsymbol{O} boldsymbol{H}(boldsymbol{g}), boldsymbol{Delta} boldsymbol{H}=boldsymbol{4} boldsymbol{9} boldsymbol{8} )
kJ ( m o l^{-1} )
( boldsymbol{O} boldsymbol{H}(boldsymbol{g}) rightarrow boldsymbol{H}(boldsymbol{g})+boldsymbol{O}(boldsymbol{g}), boldsymbol{Delta} boldsymbol{H}=mathbf{4 2 8} mathbf{k J} )
( m o l^{-1} )
The bond enthalpy of the ( O-H ) bond is:
A . 498 k ( operatorname{mol}^{-1} )
B. 463 kJ ( m o l^{-1} )
c. 428 ks ( m o l^{-1} )
D. 70 kJ ( m o l^{-1} )
11
967 The correct order of increasing bond length of ( C-H, C-O, C-C ) and
( boldsymbol{C}=boldsymbol{C} ) is :
A. ( C-H<C-O<C-C<C=C )
в. ( C-H<C=C<C-O<C-C )
c. ( C-C<C=C<C-O<C-H )
D. ( C-O<C-H<C-C<C=C )
11
968 The total number of lone pair of
electrons in ( N_{2} O_{3} ) is:
11
969 Which of the following is a volatile covalent liquid at ( 25^{circ} mathrm{C} ) and 1 atm?
A . ( N_{2} )
в. ( K I )
c. ( C C l_{4} )
D. ( A g N O_{3} )
ह. ( C a C O_{3} )
11
970 Which of the following statement is correct for the attainment of stable
electronic configuration in case of magnesium atom?
A. Magnesium atom attains stable electronic configuration of nearest noble gas-Neon
B. Magnesium atom attains stable electronic configuration by losing two electrons from its valence shel
c. Magnesium atom becomes positively charged magnesium ion after attaining stable electronic configuration
D. All of the above
11
971 Which of the following have same bond order?
This question has multiple correct options
A ( cdot H_{2}^{+} )
в. ( H_{2}^{-} )
( c cdot C l_{2} )
D. ( H e_{2}^{+} )
11
972 Which of the following species are stabilized by removal of electron? This question has multiple correct options
A . ( N O )
в. ( O_{2} )
c. ( F_{2} )
D. ( C N )
11
973 Find the bond order of peroxide ion. 11
974 Q30. Which hybrid orbitals are used by carbon atoms in the following more
ecules?
(4) CH3-CH, (b) CH–CH = CH, (c) CH-CH-OH (4) CH3-CHO (6) CH3COOH.
11
975 Which one of the following statements is true for ammonium ion?
A. All bonds are ionic
B. All bonds are coordinate covalent
c. ( H ) atoms are situated at the corners of a square
D. ( H ) atoms are situated at the corners of a tetrahedron
11
976 Select the correct reason for given statement ‘Fluoride of ( A l ) is ionic while
chloride is covalent’.
A . IE of ( A l ) in ( A l F_{3}>A l C l_{3} )
B. EA of fluorine > chloride
C . Lattice energy of ( A l F_{3}>A l C l_{3} )
D. EA of fluorine < chlorine
11
977 Is hydrogen bonding between dimethyl ether and hydrogen peroxide possible? If yes then how? And if no then why not? 11
978 r valericies.
Q4. Write the Lewis dot symbols of the following elements and predict their var
(1) CI (ii) P
11
979 Identify the pair in which the two species are isostructural.
A. ( S i F_{4} ) and ( S F_{4} )
B. ( I O_{3}^{-} ) and ( X e O_{3} )
c. ( B H_{4}^{-} ) and ( N H_{4}^{+} )
D. ( P F_{6}^{-} ) and ( S F_{6} )
11
980 Three elements ( A, B, C ) belong to IIA, IVA VIA group respectively of the periodic table. Identify the elements that form covalent bonds and that form
electrovalent bond?
11
981 Shape of ( D C l_{4}^{-} ) is:
( A cdot ) see-saw
B. perfect tetrahedral
c. square planar
D. none of these
11
982 The combination of atoms occurs
because they want:
A. to decrease number of electrons in the outer most
orbit
B. to attain an inert gas configuration
c. to increase number of electrons in the outer most orbit
D. to attain 18 electrons in the outermost orbit
11
983 6. The molecule Ne, does not exist because
(7) N, > N (6) N = N. (c) N < N
(d) None of these
7 TAlhich one is diamation Not Na NO-2
11
984 Based on lattice energy and other considerations which one of the
following alkali metal chloride has the
highest melting point?
A. ( K C l )
B. ( R h C l )
c. LiCl
D. ( N a C l )
11
985 Which of the following species has the maximum number of lone pair of
electrons on the central atom?
A. ( C l O_{3} )
в. ( X e F_{4} )
( mathrm{c} cdot S F_{4} )
D. ( I_{3} )
11
986 How many atoms of ( boldsymbol{P C l}_{5} ) lie in the
same plane?
11
987 Which of the following bond is nonpolar
covalent?
A. ( S i ) Si bond in ( C l_{3} ) sisicla
B. ( S i C l ) bond in ( C l_{3} ) sisiCla
c. ( C a F ) bond in ( C a F_{3} )
D. ( N H ) bond in ( N H_{3} )
11
988 The bond order of ( H_{2}^{-} ) ion is ( frac{1}{2} . ) If it has 2 bonding electrons, calculate the number of antibonding electrons
A . 4
B. 3
( c cdot 2 )
D.
11
989 The atomic number of ( boldsymbol{S} boldsymbol{n} ) is ( mathbf{5 0 .} ) The
shape of gaseous ( S n C l_{2} ) molecule is:
A. ( C l-S n-C l ) (linear)
B.
( c )
D.
11
990 Assertion
Boiling point of ( H F ) is lesser than
water
Reason
Hydrogen bonding in water is weaker
than ( boldsymbol{H} boldsymbol{F} )
A. Assertion is true, Reason is true and Reason is correct explanation for Assertion
B. Assertion is true, Reason is true and Reason is not the correct explanation for Assertion
C. Assertion is true, Reason is false
D. Assertion is false, Reason is true
11
991 Carbon suboxide has the formula ( C_{3} O_{2} )
( mathrm{C}-mathrm{C} ) ditance are found to be ( 130 mathrm{pm} ) and
( mathrm{C}-mathrm{O} ) distances are ( 120 mathrm{pm} . ) Lewis structures is ( boldsymbol{O}=boldsymbol{C}=boldsymbol{C}=boldsymbol{C}= )
( boldsymbol{O}, overline{boldsymbol{O}}-boldsymbol{C} equiv boldsymbol{C}-boldsymbol{C} equiv boldsymbol{O}^{+} )
If true enter 1 , else enter 0 .
11
992 Which of the following molecules are expected to exhibit intermolecular ( mathrm{H} )
bonding?
I. Acetic acid
Il. o-nitrophenol
III. m-nitrophenol
IV. o-boric acid
( mathbf{A} cdot ) ।, ॥।, ॥ ।
B. ।, ॥।, IV
c. ।, ॥ा, ।V
D. II, III, IV
11
993 In ( N O_{3}^{-} ) ion number of bond pair and
the lone pair of electrons on nitrogen
atom are:
A .2,2
в. 3,1
c. 1,3
D. 4,0
11
994 The total number of electrons in the
carbon atom of methyl free radical is:
A. six
B. seven
c. eight
D. nine
11
995 ( boldsymbol{B} boldsymbol{X}_{3}+boldsymbol{N} boldsymbol{H}_{3} rightarrow boldsymbol{B} boldsymbol{X}_{3} cdot boldsymbol{N} boldsymbol{H}_{3}+ ) Heat of
adduct formation ( (Delta H) )
The numerical value of ( Delta H ) is found to
be maximum for:
( A cdot B F_{3} )
в. ( B C l_{3} )
( mathrm{c} . B B r_{3} )
D. ( B I_{3} )
11
996 During the formation of the ionic bond, electron transfer takes place from one
atom to the others.
A. True
B. False
11
997 Assertion
During covalent bonding the electro negativity difference between two
atoms is greater than 1.7
Reason
Covalent bond is formed by sharing of
electrons between atoms that have
same size
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
998 Define isotopes. 11
999 Assertion
In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons.
Reason
Oxygen atom forms two ionic or electrovalent bonds with two hydrogen
atoms.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1000 Which of the following hydrogen bonds are strongest in vapour phase?
A. HF ( ldots ). HF. HF
B. HF ……………. HCl
c. нс।……………. нс।
D. HF ……………. H
11
1001 Intermolecular interactions that is
dependent on the inverse cube of distance between the new molecules is
A. lon lon interactions
B. Ion-dipole interaction
c. London forces
D. Hydrogen bond
11
1002 If a molecule ( M X_{3} ) has zero dipole
moment, the ( sigma ) – bonding orbitals used by M (atomic number ( <21 ) ) is:
A . pure ( p )
B. ( s p ) – hybridized
c. ( s p^{2} ) – hybridized
D. ( s p^{3} ) – hybridized
11
1003 Draw the Lewis structure for ( C O_{3}^{2-} ) 11
1004 What type of bond exists between ( boldsymbol{H} boldsymbol{F} )
( N H_{3}, C_{2} H_{5} O H ) molecules?
11
1005 Which types of bonding are present in ammonium carbonate, ( left(N H_{4}right)_{2} C O_{3} ? )
1. lonic
2. Covalent
3. Co-ordinate(dative covalent).
A. 1,2 and 3 are correct
B. 1 and 2 are correct
( c cdot 2 ) and 3 are correct
D. 1 is correct
11
1006 The atomic number of three elements
( A, B ) and ( C ) are ( a, a+1 ) and ( a+2 )
respectively. If ( C ) is an alkali metal, then
the nature of bonding in the compound of ( A ) and ( C ) is
A. co-ordinate
B. covalent
c. ionic
D. metallic
11
1007 The strongest acid among the following is –
( mathbf{A} cdot mathrm{ClO}_{3}(mathrm{OH}) )
B. ( mathrm{ClO}_{2}(mathrm{OH}) )
( mathbf{c} cdot operatorname{SO}(mathrm{OH})_{2} )
( mathrm{D} cdot mathrm{SO}_{2}(mathrm{OH})_{2} )
11
1008 Ice is an example of the following crystal:
A . covalent
B. ionic
c. van der Waal
D. hydrogen bonding
11
1009 Which of the following compounds would have significant intermolecular hydrogen bonding?
( boldsymbol{H} boldsymbol{F}, boldsymbol{C} boldsymbol{H}_{3} boldsymbol{O} boldsymbol{H}, boldsymbol{N}_{2} boldsymbol{H}_{4}, boldsymbol{C} boldsymbol{H}_{4} )
This question has multiple correct options
A. ( H F, N_{2} H_{4} )
в. ( H F, C H_{4}, C H_{3} O H )
( mathbf{c} cdot H F, C H_{3} O H )
D. ( C H_{3} O H, C H_{4} )
11
1010 Assertion
Boiling and melting points of amides are higher than corresponding acids.
Reason
It is due to strong intermolecular hydrogen bonding in their molecules
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1011 09. Which of the following has larger bond angle in each pair?
(1) CO, BF, (ii) NH, CH,
11
1012 Oxygen molecule is paramagnetic in nature. What is the paramagnetic
content in terms of the magnetic
moment in ( O_{2}^{-} ? )
A . 1.732
B. 3
c. 1.5
D. 2.5
11
1013 Two atoms of elements ( X ) and ( Y )
contribute an electron each during the bond formation and both ( X ) and ( Y ) have
equal tendency to attract the shared electron pair. The type of bond formed between ( X ) and ( Y )
is
A. polar covalent bond
B. ionic bond
c. coordinate covalent bond
D. non-polar covalent bond
11
1014 Soid PCI ( _{5} ) exists as ? 11
1015 Molecule having maximum number of
covalent bonds is:
( mathbf{A} cdot N H_{4} O H )
в. ( N H_{4} C l )
c. ( C Oleft(N H_{2}right)_{2} )
D. ( C H_{3} O H )
11
1016 VSEPR notation of ( boldsymbol{P C l}_{5}, boldsymbol{H}_{2} boldsymbol{O} ) and ( boldsymbol{I} boldsymbol{C l}_{mathbf{4}}^{-} )
are:
A ( cdot P C l_{5}-A X_{5}, H_{2} O-A X_{2} E_{2}, I C l_{4}^{-}-A X_{4} E_{2} )
B. ( P C l_{5}-A X_{5}, H_{2} O-A X_{2} E, I C l_{4}^{-}-A X_{4} E )
( mathrm{c} cdot P C l_{5}-A X_{5}, H_{2} O-A X_{2}, I C l_{4}^{-}-A X_{4} E )
D. ( P C l_{5}-A X_{5}, H_{2} O-A X_{2} E_{2}, I C l_{4}^{-}-A X_{4} E )
11
1017 037. Write the significance of plus and minus sign in representing the orbitals. 11
1018 The hybridization of iron in
( boldsymbol{K}_{4}left[boldsymbol{F} boldsymbol{e}(boldsymbol{C} boldsymbol{N})_{6}right] ) is?
A ( cdot d s p^{2} )
B ( cdot s p^{3} )
c. ( d^{2} s p^{3} )
D. ( d^{2} s p^{2} )
11
1019 Question 25. Explain why inspite of nearly the same electronegativity,
nitrogen forms hydrogen bonding while chlorine does not?
11
1020 If BCI bond has a dipole moment,
explain why ( B C l_{3} ) molecule has
zero dipole moment
11
1021 Why does HF has the maximum boiling point amongst all hydrogen halides?
A. Due to hydrogen bonding
B. Due to Vander Waal’s forces
c. Due to minimum molecular mass
D. None of these
11
1022 Count the total number of ( X-O ) bonds
having equal length in ( boldsymbol{H} boldsymbol{S} boldsymbol{O}_{4}^{-} ) and
( boldsymbol{S}_{3} boldsymbol{O}_{6}^{2-} ) respectively. (If the answer is 5 and 3 then represent as 53 )
A . 36
B. 40
( c cdot 42 )
D. 44
11
1023 A correct statement is/are:
This question has multiple correct options
( mathbf{A} cdotleft[M n B r_{4}right]^{-2} ) is tetrahedral
B. ( left[N ileft(N H_{3}right)_{6}right]^{+2} ) is an inner orbital complex
( ^{mathbf{C}} cdotleft[operatorname{Co}left(N H_{3}right)_{6}right]^{+2} ) is paramgnetic
D ( cdotleft[operatorname{CoBr}_{2}(e n)_{2}right]^{-} ) exhibits linkage isomerism
11
1024 Assertion
On reacting ( M g ) with ( C l_{2}, M g C l_{2} ) is
formed and not ( M g C l )
Reason
( M g^{2+} ) ion has stable octet
configuration and not ( M g^{+} )
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1025 Write a note on properties and uses of covalent compounds. 11
1026 Comment on electrovalent Bond
Formation
11
1027 Hydrogen halide with the highest boiling point is:
( mathbf{A} cdot H F )
в. ( H B r )
c. ( H C l )
D. ( H I )
11
1028 Assertion
In Lewis structures of ( N F_{3} ) and ( C O_{3}^{2-} )
nitrogen and carbon occupy the central position whereas fluorine and oxygen
occupy the terminal positions.
Reason
In Lewis representation, the least electronegative atom occupies the central position in the molecule/ion.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1029 The correct electron dot structure of a
water molecule is:
( A )
H ợ ( cdot ) H
в. H :ö. H
c. H :ö: H
D. H : ( 0: H )
11
1030 The lattice energy of NaCl is
( 788 k J ) mol ( ^{-1} . ) This means that ( 788 k J )
of energy is required:
A. to separate one mole of solid ( N a C l ) into one mole of ( N a(g) ) and one mole of ( C l(g) ) to infinite distance
B. to separate one mole of solid ( N a C l ) into one mole of ( N a^{+}(g) ) and one mole of ( C l^{-}(g) ) to infinite distance
C. to convert one mole of solid ( N a C l ) into one mole of
gaseous ( N a C l )
D. to convert one mole of gaseous ( N a C l ) into one mole of solid ( N a C l )
E. to separate one mole of gaseous ( N a C l ) into one mole of ( N a^{+}(g) ) and one mole of ( C l^{-}(g) ) to infinite distance
11
1031 Assertion
Generally, covalent compounds are gases, liquids or soft solids at room temperature.
Reason
Between covalent compounds Vander
Waals forces of attractions exists
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1032 State whether the statement is true or
false :
In the electron dot structure, the
valence shell electron is represented by
cross or dot.
11
1033 Strongest hydrogen bond is present in:
( mathbf{A} cdot C H_{3} O H )
в. ( C H C l_{3} )
( mathbf{c} cdotleft[C H_{3}right]_{2} C H O H )
D. ( left[C H_{3}right]_{3} C O H )
11
1034 Q. 31 Explain the non-linear shape of H2S and non-planar shape of PCL 3 using
valence shell electron pair repulsion theory.
ito volonco choll
S=2.8.6). TWO
11
1035 Among ( L i C l, B e C l_{2}, B C l_{3} ) and ( C C l_{4} )
the covalent charecter varies as:
A ( cdot operatorname{Li} C lB C l_{3}>C C l )
в. ( L i C l>B e C l_{2}<B C l_{3}<C C l_{4} )
c. ( L i C l<B e C l_{2}<B C l_{3}B e C l_{2}>B C l_{3}>C C l_{4} )
11
1036 Which one of the following does not have intermolecular H-bonding? This question has multiple correct options
A. ( C H_{4} )
в. ( H_{2} S e )
c. ( N_{2} H_{4} )
D. ( H_{2} S )
11
1037 Give the Molecular Orbital Energy
diagram of a) ( left.N_{2} text { and } bright) O_{2} ). Calculate
the respective bond order. Write the
magnetic nature of ( N_{2} ) and ( O_{2} )
molecules.
11
1038 Which of the following is not an ionic compound?
A. Sodium hydride
B. Carborundum
c. Potassium oxide
D. Calcium carbide
11
1039 Predict the structures of ( boldsymbol{P H}_{3} boldsymbol{C l}_{2} )
A. Trigonal bipyramidal with apical H atoms
C. Trigonal bipyramidal with apical Cl atoms
D. Square pyramidal with apical Cl atom
11
1040 Bonding in ferric chloride is
A. Covalent
B. Ionic
c. co-ordinate
D. None of the above
11
1041 Q. 6 In NO3 ion, the number of bond pairs and lone pairs of electrons on
nitrogen atom are
(a) 2,2 B
(6) 3, 1
(c) 1,3
(d) 4,0
Thinking Process
To solve this question, we must know the structure of Nozioni.es
So=N-0:1
o
Then, count the bond pairs and lone pairs of electron on nitrogen.
11
1042 The state of hybridization of boron and oxygen atoms in boric acid ( left(boldsymbol{H}_{3} boldsymbol{B} boldsymbol{O}_{3}right) )
respectively are:
A ( cdot s p^{2} ) and ( s p^{2} )
B. ( s p^{2} ) and ( s p^{3} )
c. ( s p^{3} ) and ( s p^{2} )
D. ( s p^{3} ) and ( s p^{3} )
11
1043 In a triple bond, there is sharing of:
A. 3 electrons
B. 4 electrons
c. 6 electrons
D. none of these
11
1044 Which of the following group show ( +M ) effect ?
( mathbf{A} cdot-C N )
в. ( N O )
c. ( -C C l_{3} )
D. – ( C H O )
11
1045 In which of the following pairs, hydrogen bonding is not possible?
A. ( N H_{3}, N H_{3} )
в. ( N H_{3}, C H_{4} )
с. ( H_{2} O, C H_{3} O H )
D. ( H F, H_{2} O )
11
1046 Sharing of valence electrons between two atoms generally takes place between ( _{text {toms. }} )
A. metallic
B. non-metallic
c. large
D. small
11
1047 Calculate the change in enthalpy for the
following process at 1 atm ( boldsymbol{H}_{2} boldsymbol{O}left(boldsymbol{l}, mathbf{5} boldsymbol{0}^{o} boldsymbol{C}right) rightarrow boldsymbol{H}_{2} boldsymbol{O}left(boldsymbol{g}, mathbf{1 5 0}^{boldsymbol{o}} boldsymbol{C}right) )
given that ( Delta H_{v} ) at ( 100^{circ} mathrm{C} ) is
( 40.7 k J m o l^{-1} )
( C_{P}left(H_{2} O, lright)=75.0 J m o l^{-1} K^{-1} )
( boldsymbol{C}_{boldsymbol{P}}left(boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{g}right)=mathbf{3 3} . boldsymbol{3} boldsymbol{J} boldsymbol{m o l}^{-1} boldsymbol{K}^{-1} )
A ( .64 .8 K J )
в. ( 52.5 K J )
c. ( 48.6 K J )
D. ( 46.1 K J )
11
1048 Assertion
( pi_{b} ) and ( pi^{*} ) orbitals obtained from ( 2 p )
orbital are lying in the same plane.
Reason
Bonding M.O’s are formed by constructive interference while
antibonding M.O’s are formed by destructive interference.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1049 What type of forces act between the ions during the formation of a crystal of ionic compound? 11
1050 A polar bond is formed between two
atoms of different electronegativity. A polar molecule results when there is
only one polar bond, or more than one polar bond within it is not sufficiently symmetrically oriented to cancel the effects of the others.
Select the correct order of boiling point.
( mathbf{A} cdot H_{2} OH F )
( mathbf{c} cdot H F=H_{2} O )
D. None of these
11
1051 The intermolecular interaction
dependent on the inverse cube of between the molecules is:
A. ion-ion interaction
B. ion-dipole interaction
c. london force
D. none of the above
11
1052 Find the oxidation number of Calcium
in ( C a O )
( A cdot+1 )
B. – –
( c cdot+2 )
( D cdot-2 )
11
1053 According to molecular orbital theory, the total number of bonding electron
pairs in ( boldsymbol{O}_{2} ) is:
A .2
B. 3
( c .5 )
D. 4
11
1054 The total number of electrons that take
part in forming the bond in ( N_{2} ) is :
( A cdot 2 )
B. 4
( c cdot 6 )
D. 10
11
1055 The stickiness of honey which mainly consists of water and sugar is due to:
A. presence of sugar
B. strong bonding in sugar
c. hydrogen bonding
D. presence of some organic compound
11
1056 Q. 16 The molecular formula of the compound formed from B
mula of the compound formed from B and C will be
(a) BC
(b) B,C
(c) BC2
(d) BC3
hour and represents
11
1057 State true or false:
In nature, all elements during bond formation acquire octet configuration
11
1058 Which of the following will have maximum covalent character?
A . ( N a C l )
в. ( N a B r )
c. ( N a I )
D. ( N a F )
11
1059 State the type of Bonding in the
following molecules:
Calcium oxide.
11
1060 What is meant by the term bond order?
Calculate the bond order of: ( N_{2}, O_{2}, O_{2}^{+} )
and ( boldsymbol{O}_{2}^{-} ? )
11
1061 Which of the respective orders are
correct?
This question has multiple correct options
( mathbf{A} cdot N H_{3}>S b H_{3}>A s H_{3}>P H_{3}: ) Thermal stability
order
B. Liquid hydrogen S r C O_{3}>B a C O_{3}: k_{p} ) value order during
their thermal dissociation in closed container
( mathrm{D} cdot mathrm{O}_{2}>mathrm{K} mathrm{O}_{2}>mathrm{K}_{2} mathrm{O}_{2}: ) Magnetic moment order
11
1062 Highest covalent character is found in which of the following?
A. ( C a F_{2} )
в. ( C a C l_{2} )
( mathrm{c} cdot mathrm{CaI}_{2} )
D. ( C a B r_{2} )
11
1063 The structure and hybridization of
( boldsymbol{S} boldsymbol{i}left(boldsymbol{C} boldsymbol{H}_{3}right)_{4} ) respectively, is:
A. bent and ( s p )
B. trigonal and ( s p^{2} )
c. octahedral and ( s p^{3} d )
D. tetrahedral and ( s p^{3} )
11
1064 Polar covalent compounds dissolve in water due to presence of partial charges on polar covalent compounds.
A. True
B. False
11
1065 Which of the following statements is
true concerning ethene?
A. Both carbon atoms are ( s p^{2} ) hybridized and the molecule is planar
B. Both carbon atoms are ( s p^{2} ) hybridized and all bond
angles are approximately ( 109.5^{circ} )
C. One carbon atom is ( s p ) hybridized while the other is ( s p^{2} )
D. Both carbon atoms are ( s p^{3} ) hybridized and all bond angles are approximately ( 109.5^{circ} )
E. Both carbon atoms are ( s p ) hybridized and the molecule
is planar
11
1066 ( Delta H_{f}^{o} ) of ( N_{2} O ) is ( 82 k J / m o l ) and bond
energy for ( N_{2}, N=N, O=O ) and
( N=O ) bonds are 946,418,498 and
( 607 k J / ) mol respectively. Resonance
energy of ( N_{2} O ) is:
A. ( -170 k J / m o l )
в. ( -252 k J / m o l )
c. ( -88 k J / m o l )
D. ( -1195 k J / ) mol
11
1067 Select the incorrect geometry for
hybridization:
A. ( s p= ) linear
В ( cdot s p^{3} d= ) Т.В.Р.
( mathbf{c} cdot s p^{3} d^{2}=P . B . P )
D. All are correct
11
1068 Valence bond theory of Pauling and Slater accounts for the following characteristic of covalent bond:
A. directional
B. ionic
c. strength
D. hybrid
11
1069 Which of the following is steam volatile?
A. Phenol
B. o-Nitrophenol
c. m-Nitrophenol
D. p-Nitrophenol
11
1070 Which statements (s) is (are)correct?
This question has multiple correct options
A. ( A pi- ) bond is weaker then ( sigma ) -bond
B. ( A sigma- ) bond is weaker then ( pi- ) bond
C. A double bond stronger then H-bond
D. A covelent bond stronger then H-bond
11
1071 Which of the following statement
is false?
( mathbf{A} cdot H_{2} ) has just one sigma bond
B. ( H C l ) has just one sigma bond
( mathbf{c} cdot H-C equiv C-H ) has four pi bonds and three sigma bonds
D. ( C H_{2}=C H_{2} ) has five sigma bonds and one pi bond
( mathrm{E} cdot H_{2} mathrm{O} ) has two sigma bonds and two lone pairs
11
1072 Use the figure below to answer the
question that follows. Which of the four molecular structures.
I-IV, exhibits trigonal planar molecular geometry?
0
ex
( 0=t )
( A )
в.
( c )
( D )
11
1073 What is the formal charge on the
chlorine atom in the oxyacid ( H O C l O_{2} ) if it contains single bonds?
A . -2
B. – 1
( c cdot+1 )
D. +2
11
1074 ( ln C O_{3}^{2-}, ) all the three ( C-O ) bonds are
of identical length. State whether the above statement is
true or false
A. The statement is true
B. The statement is false
c. Neither
D. ( ln C O_{2}^{2-} ), all the three ( C-O ) bonds are of identical length
11
1075 Dipole moment of is 1.5 D. The dipole
moment of is
( mathbf{A} cdot 1.5 D )
B. ( 2.25 D )
c. ( 1 D )
D. ( 3 D )
11
1076 In which of the following species the angle around the central atom is
exactly equal to ( 109^{circ} 28^{prime} ? )

This question has multiple correct options
( mathbf{A} cdot S F_{4} )
в. ( N H_{3} )
( mathrm{c} cdot 1 mathrm{NH}_{4}^{+} )
D. None of the above

11
1077 Q.43 Arrange the following bonds in order of increasing ionic character giving
reason.
N-H, F-H, C-H and 0-H
11
1078 Which of the following is the correct representation of electron dot structure of nitrogen?
( A )
( therefore ddot{N}: dot{N} )
в. ( therefore dot{mathbf{N}}: dot{mathbf{N}} )
( therefore dot{mathbf{N}}: dot{mathbf{N}} )
D. ( therefore ) N:
11
1079 Which of the following molecule does not have a linear arrangement of
atoms?
A ( . H_{2} S )
в. ( C_{2} H_{2} )
( mathbf{c} cdot B e H_{2} )
D. ( C O_{2} )
11
1080 Select the INCORRECT statement:
( mathbf{A} cdot N_{2} O ) with sodium metal in liquid ammonia forms sodium azide and nitrogen gas is liberated.
B. Ammonia is oxidized to nitrogen by dilute solution of sodium hypochlorite in presence of glue.
C. Ammonium dichromate on heating decomposes to give nitrogen and a green coloured compound.
D. CaNCN on hydrolysis produces a white precipitate and a gas which turns filter paper moistened with copper sulphate solution deep blue.
11
1081 Which of the following is an amphoteric oxide?
A. ( S O_{3} )
в. ( M g O )
c. ( A l_{2} O_{3} )
D. ( P_{4} O_{10} )
11
1082 One part of an element A combines with two parts of B (another element). Six parts of element C combine with four
parts of element B. If A and C combines together, the ratio of their masses will
be governed by:
A. law of definite proportions
B. law of multiple proportions
c. law of reciprocal proportions
D. law of conservation of mass
11
1083 Which of the following overlap is/are
correct?
This question has multiple correct options
( A )
( 00+00 )
0
в.
( 00+00 )
0
c. ( infty+infty )
( 00+infty )
D. None of the above
11
1084 Which one of the following paires of elements is most likely to form an ionic
compount?
( mathbf{A} cdot mathbf{B} ) and ( C I_{2} )
B. ( mathrm{K} ) and ( mathrm{O}_{2} )
c. ( O_{2} ) and ( C I_{2} )
D. Al and ( I_{2} )
11
1085 Find the number of molecule(s) is/are having zero dipole moment and linear shape from the following:
( boldsymbol{C l} boldsymbol{F}_{3}, boldsymbol{I}_{3}^{-}, boldsymbol{C O}_{2}, boldsymbol{H} boldsymbol{g} boldsymbol{C l}_{2}, boldsymbol{I} boldsymbol{C l}_{2}^{-}, boldsymbol{X} boldsymbol{e} boldsymbol{F}_{2} )
11
1086 Which of the following species have
shortest ( N-O ) bond length?
A . ( N O )
B. ( N O^{+} )
( mathrm{c} cdot mathrm{N} mathrm{O}_{2}^{2+} )
D. ( N O^{-} )
11
1087 Assertion
The ( 0-0 ) bond length in ( H_{2} O_{2} ) is shorter
than that of ( O_{2} F_{2} )
Reason
( H_{2} O_{2} ) has an open book-type structure.
Read the above assertion and reason
and choose the correct option regarding
¡t.
A. Assertion is true, Reason is true and Reason is correct explanation for Assertion
B. Assertion is true, Reason is true and Reason is NOT the
correct explanation for Assertion
c. Assertion is true, Reason is false
D. Assertion is false, Reason is true
11
1088 Hydrogen bonding is maximum in
A. Ethanol
B. Diethylether
c. Ethyl chloride
D. Triethylamine
11
1089 The electron dot structure for ( B F_{3} ) is
( A )
B.
( c )
( D )
11
1090 Using the cross-section image of an
iodine solid, which of the following
explains why it cannot conduct
electricity in the solid or molten states?
A. The molecular lattice points are too far away to conduct electricity
B. Only metallic solids conduct electricity
C. The electrons are tightly bound within the covalent bond of the ( I_{2} ) molecules.
D. The electrons are too polarizable to conduct electricity.
11
1091 Least active electrophile is
A. ( C H_{3}-_{|}^{C}-O C H_{3} )
B. ( _{text {I }}^{o} )
[
C H_{3}-C-C l
]
c. ( C H_{3}-underset{d}{|}_{O}-N M e_{2} )
D.
[
C H_{3}-C-S C H_{3}
]
11
1092 The total number of ( pi ) electrons in the
given structure are :
( A cdot 12 )
B. 16
( c )
D
11
1093 The compound which does not contain
ionic bond is:
A . NaOH
в. нс
( mathrm{c} cdot K_{2} )
D. Lif
11
1094 Among ( boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{H}_{2} boldsymbol{S}, boldsymbol{H}_{2} boldsymbol{S} boldsymbol{e} ) and ( boldsymbol{H}_{2} boldsymbol{T} boldsymbol{e} )
the one with the highest boiling point is:
A. ( H_{2} O ) because of hydrogen bonding interactions
B. ( H_{2} ) Te because of its higher molecular weight
c. ( H_{2} S ) because of hydrogen bonding interactions
D. ( H_{2} ) Se because of its lower molecular weight
11
1095 Identify the correct order of lattice energies.
A. ( C s C l<R b C l<K C lC a C l_{2}>A l C l_{3} )
c. ( N a C l<L i C l<M g C l_{2}N a C l<M g C l_{2}<A l C l_{3} )
11
1096 The hybridisation of nitrogen in nitrate
ion is:
( mathbf{A} cdot s p )
B ( cdot s p^{2} )
( c cdot s p^{3} )
D. ( s p^{3} d )
11
1097 Why ( N O_{2}^{+} ) and ( I_{3}^{-} ) are linear species? 11
1098 Anhydrous ( A l C l_{3} ) is covalent. from the
data given below Lattice Energy ( =5137 mathrm{KJ} ) mol( ^{-1} )
( triangle boldsymbol{H} ) hydration ( boldsymbol{A l}^{3+}= )
( -4665 K J / m o l^{-1} )
( triangle boldsymbol{H} ) hydration ( boldsymbol{C l}^{-}= )
( -381 K J / m o l^{-1} )
Identify the correct statement-
A. It will remain covalent in aqueous solution
B. The solution will consists of ( A I^{3+} ) and ( C I^{-} )
c. The solution will consists of hydrate ( A I^{3+} ) and ( C I^{-} )
D. None of these
11
1099 Q34. Write the important conditions required for the linear combination of atomic orbitals to form
molecular orbitals.
11
1100 The nature of the bond in diamond is:
A. ionic
B. covalent
c. matallic
D. coordinates covelent
11
1101 ( boldsymbol{S b F}_{5} ) reacts with ( boldsymbol{X} boldsymbol{e} boldsymbol{F}_{4} ) and ( boldsymbol{X} boldsymbol{e} boldsymbol{F}_{6} ) to
form ionic compounds ( left[boldsymbol{X} boldsymbol{e} boldsymbol{F}_{3}^{+}right]left[boldsymbol{S b} boldsymbol{F}_{6}right]^{-} boldsymbol{a n d}left[boldsymbol{X} boldsymbol{e} boldsymbol{F}_{5}^{+}right]left[boldsymbol{S b} boldsymbol{F}_{6}^{-}right] )
The geometry of ( X e F_{3}^{+} ) ion and ( X e F_{5}^{+} ) ion, respectively, is :
A. sqare pyramidal, T-shaped
B. bent T-shaped, square pyramidal
c. see-saw, square pyramidal
D. square pyramidal, see-saw
11
1102 Q40. What is meant by the term bond order? Calculate the bond order of:
N₂0₂0₂ +0₂
11
1103 For the given bond pairs, decide which is the more polar?
( boldsymbol{S} boldsymbol{i}-boldsymbol{O} ) and ( boldsymbol{P}-boldsymbol{P} )
A ( . S i-O>P-P )
в. ( S i-O<P-P )
c. ( s i-O=P-P )
D. None of these
11
1104 Which among the following best describes the orbital overlap in
a molecule of :
( boldsymbol{H}-underset{H}{_{H}}=underset{H}{boldsymbol{I}}-boldsymbol{H} )
i. s to s
ii. s to ( mathrm{p} )
iii. ( s p^{2} ) to ( s p^{2} )
A. i only
B. ii only
c. i and iii only
D. ii and iii only
E. i, ii and iii
11
1105 Write the maximum number of atoms
having same hybridisation in 2,5 -di-Nchloridothioimino-3, ( 4^{-} ) diazonothiophene
A .4
B. 5
( c cdot 6 )
( D )
11
1106 Q. 44 Explain why Co- ion cannot be represented by a single Lewis structure.
How can it be best represented?
It can be
11
1107 Match the column I with column II and
mark the appropriate choice.
Column II
(A) ( s p^{3} d^{2} )
( C_{2} H_{2} quad ) (i) ( quad ) hybridisation
(B) ( s p^{3} d^{3} )
( S F_{6} quad ) (ii) ( quad ) hybridisation
( begin{array}{llll}text { (C) } & S O_{2} & text { (iii) } & s p text { hybridisation }end{array} )
( begin{array}{llll}text { (D) } & I F_{7} & text { (iv) } & s p^{2} text { hybridisation }end{array} )
A ( cdot(A) rightarrow(i),(B) rightarrow(text { iii }),(C) rightarrow(text { ii }),(D) rightarrow(i v) )
B. ( (A) rightarrow(text { iii), }(B) rightarrow(i),(C) rightarrow(i v),(D) rightarrow(i) )
C. ( (A) rightarrow(text { ii) },(B) rightarrow(text { iii) },(C) rightarrow(i),(D) rightarrow(i v) )
D. ( (A) rightarrow(text { iv ) },(B) rightarrow(i),(C) rightarrow(text { iii }),(D) rightarrow(text { ii }) )
11
1108 The presence of polar bonds in a
polyatomic molecule suggests that the molecule has non-zero dipole moment.
If true enter 1 , else enter 0 .
11
1109 Q38. Describe the hybridisation in case of PCI.. Why are the axial bonds longer as compared to
equatorial bonds?
are represented as
11
1110 Which formulae does not correctly
represents the bonding capacity of the
atom involved?
This question has multiple correct options
( A )
( mathrm{CH}_{3} mathrm{C}=mathrm{CCH}_{3} )
B.
( c )
( D )
11
1111 Consider the following molecules/ions:
( boldsymbol{S} boldsymbol{O}_{2}, boldsymbol{C} boldsymbol{O}_{2}, boldsymbol{N}_{2} boldsymbol{O}, boldsymbol{O} boldsymbol{F}_{2}, boldsymbol{I} boldsymbol{C l}_{2}^{-}, boldsymbol{I}_{3}^{-}, boldsymbol{N} boldsymbol{O}_{2}, boldsymbol{N} )
Among the above, the number of molecules/ions which are linear, is
11
1112 The linear structure is assumed by:
This question has multiple correct options
( mathbf{A} cdot operatorname{Sn} C l_{2} )
в. ( N C O^{-} )
( mathrm{c} cdot mathrm{NO}_{2}^{+} )
D. ( C S_{2} )
11
1113 top
Q Type your question
codes given below:
Column( mathbf{1} )
Bond order
(a) ( N_{2} rightarrow quad ) increases and
( N_{2}^{+} )
(p) magnetic property is changed
Bond order
( (b) )
( O_{2}^{+} rightarrow quad ) decreases and
(q) magnetic property ( O_{2}^{2+} quad ) is not changed
Bond order
(c)
( B_{2} rightarrow ) ( B_{2}^{+} )( quad ) (r) ( quad ) increases and magnetic property is not changed
Bond order
(d)
( begin{array}{l}begin{array}{l}N O^{-} rightarrow \ N Oend{array} rightarrow & text { (s) } quad begin{array}{l}text { decreases and } \ text { magnetic property } \ text { is changed }end{array}end{array} ) 1 Note: Here change in magnetic property refers to change from diamagnetic to
paramagnetic or paramagnetic to diamagnetic.
( A cdot A-s, B-p, C-r, D-q )
B. ( A-s, B-p, C-q, D-r )
( C cdot A-r, B-q, C-s, D-p )
D. ( A-p, B-s, C-q, D-r )
11
1114 Write order of dipole moment of
following compounds:
( (mathrm{i}) )
(ii)
(iii)
(v)
( (mathbf{v i}) )
A ( .(i i i)>(i i)>(i)>(i v)>(v)>(v i) )
B. ( (i i i)>(i)>(i i)=(v i)>(i v)>(v) )
C. ( (i i)>(i)=(i i i)=(i v)>(v)=(v i) )
D. ( (i i i)>(i)>(i v)>(v)>(i i)>(v i) )
11
1115 8
8
8
8
11
1116 The inter nuclear distance in ( H_{2} ) and
( C l_{2} ) molecules are 74 and 198 pm.
respectively. The bond length of ( H C l )
may be:
( mathbf{A} cdot 136 p m )
в. ( 272 mathrm{pm} )
c. ( 135.919 mathrm{pm} )
D. ( 271.919 mathrm{pm} )
11
1117 Which compound processes the greatest lattice energy?
( mathbf{A} cdot L i B r )
в. LiCl
c. ( L i I )
D. ( L i F )
11
1118 enthalpy stabilises an ionic compound the most.
A. low ionization
B. high electron affinity
c. lattice
D. none of them
11
1119 Which type of bond are there between
atoms of potassium and chloride when they form a crystal of potassium
chloride?
A. Hydrogen bond
B. lonic bond
c. Polar covalent bond
D. Nonpolar covalent bond
E. Metallic bond
11
1120 Calculate the ratio of ( sigma ) bonding
electrons and ( pi ) bonding electrons in ( B_{2} ) molecule.
11
1121 The maximum number of sublevels,
orbitals and electrons in n-shell of an
atom are respectively
A .4,12,32
B. 4,16,30
c. 4,16,32
D. 4,32,64
11
1122 The number of ( sigma ) and ( pi ) bonds in ( C_{2} H_{2} )
is:
A. 0 and 4
B. 2 and 2
( c .3 ) and 2
D. 4 and 2
11
1123 5. A molecule or ion is stable if:
(a) N = N (6) N < N (c) N <NO
6 The molecule Ne does not exist because
(d) N.-No = + ve
11
1124 The ionic bonds ( X^{+} Y^{-} ) are formed
when
(I) electron affinity of ( Y ) is high
(II) ionization energy of ( boldsymbol{X} ) is low
(III) lattice energy of ( boldsymbol{X} boldsymbol{Y} ) is high
(IV) lattice energy of ( boldsymbol{X} boldsymbol{Y} ) is low
A . I and II
B. I and III
c. ।, ॥ and III
D. All
11
1125 Considering only lattice enthalpy, arrange them in the increasing order of their stability:
Na ( C l, M g C l_{2}, M g O )
A. ( N a C l, M g O, M g C l_{2} )
в. маСl, М ( g ) Са( _{2}, ) М ( g ) О
c. ( M g C l, M g O, M g C l_{2} )
D. none of these
11
1126 ( S F_{2}, S F_{4} ) and ( S F_{6} ) have the
hybridisation of sulphur atom
respectively as:
A ( cdot s p^{2}, s p^{3}, s p^{3} d^{2} )
B ( cdot s p^{3}, s p^{3}, s p^{3} d^{2} )
( mathbf{c} cdot s p^{3}, s p^{3} d, s p^{3} d^{2} )
D ( cdot s p^{3}, s p^{3} d^{2}, d^{2} s p^{3} )
11
1127 The molecular structure of a compound
is as below:
( mathrm{H}-mathrm{S}-mathrm{H} )
What is the name of the compound?
A. Sulphuric acid
B. Sulphur dioxide
c. Hydrogen sulphide
D. Sodium hydroxide
11
1128 If true enter 1 , else enter 0 .
The energy of the resonance hybrid may
be more than that of any of the
individual Lewis formula.
A.
11
1129 State True or False.
( C O_{2} ) is a polar molecule but not have
polar bond
A. True
B. False
11
1130 What charge do group IV A atoms have when they become ions?
A. Either +4 or – 4 but they don’t usually become ions.
B. +4
( c cdot-4 )
( D cdot+3 )
E. – –
11
1131 The lewis acidity of ( B F_{3} ) is less than
( B C l_{3} ) even though fluorine is more electronegative than chlorine. It is due
to:
A. stronger ( 1 p(B)-3 p(C l) sigma- ) bonding
B. stronger ( 2 p(B)-3 p(C l) pi- ) bonding
c. stronger ( 2 p(B)-2 p(F) sigma- ) bonding
D. stronger ( 2 p(B)-2 p(F) pi- ) bonding
11
1132 Which of the following ions is diamagnetic? This question has multiple correct options
A. ( B e E t_{2} )
в. АlМе( _{3} )
c. ( B_{2} H_{6} )
D. ( operatorname{Si}left(C H_{3}right)_{4} )
11
1133 The bond in the formation of fluorine
molecule will be:
A. due to ( s-s ) overlapping
B. due to ( s-p ) overlapping
c. due to ( p-p ) overlapping
D. due to ( d-d ) hybridization
11
1134 When two isomeric liquid compounds
( A^{prime} ) and ( ^{prime} B^{prime} ) form ( H- ) bonding are
heated, compound ‘ ( A^{prime} ) boils at lower
temperature than’ ( B^{prime} ). Which of the
following is correct for ( ^{prime} boldsymbol{A}^{prime} ) and ( ^{prime} boldsymbol{B}^{prime} ) ?
A. Intermolecular ( H ) -bonding present in’ ( A^{prime} )
B . Intramolecular ( H ) -bonding present in’ ( ^{prime} A^{prime} )
C. Intramolecular ( H ) -bonding present in ( ^{prime} B^{prime} )
D. None of the above
11
1135 The total number of moles of valence
electrons in ( 4.2 mathrm{g} ) of ( N_{3}^{-} ) ion are:
A ( .2 .2 N_{A} )
в. ( 4.2 N_{A} )
c. ( 1.6 N_{A} )
D. ( 3.2 N_{A} )
11
1136 Q2. What are Lewis structures? Write the Lewis structure of H, BeF, and H,O. 11
1137 (a) List three properties of ionic compounds.
(b) Show the formation of ( N a C l ) by transfer of electron
(c) How is it that ionic compounds in
the solid state do not conduct
electricity but they do so when in molten state?
11
1138 Which among the following is not a planar molecule?
A ( cdot B C l_{3} )
B. ( C_{2} H_{4} )
c. ( S F_{4} )
D. ( H_{2} O )
11
1139 Given the following bond energies, ( boldsymbol{C}-boldsymbol{H}=mathbf{4 1 4} boldsymbol{K} boldsymbol{J} / boldsymbol{m o l} )
( boldsymbol{C}-boldsymbol{C l}=mathbf{1 5 0} boldsymbol{K} boldsymbol{J} / boldsymbol{m o l} )
( C l-C l=243 K J / m o l )
( boldsymbol{H}-boldsymbol{C l}=mathbf{4 3 2} boldsymbol{K} boldsymbol{J} / boldsymbol{m o l} )
How much energy would be required in the reaction?
( boldsymbol{C H}_{4(boldsymbol{g})}+boldsymbol{2} boldsymbol{C l}_{2(boldsymbol{g})} rightarrow boldsymbol{C H}_{2} boldsymbol{C l}_{2(boldsymbol{g})}+ )
( 2 H C l_{(g)} )
A. -150 KJ
J
в. -130 Кл
с. -228 Кл
D. -571 Кл
11
1140 Which one of the following compounds is shown its strongest hydrogen bonding?
A. Ammonia
в. ( H_{2} O_{2} )
c. ( H F )
D. ( H_{2} O )
11
1141 In which of the following molecules the central atom does not retain any lone pair of electrons?
A ( cdot N O_{2} )
в. ( N H_{3} )
c. ( B F_{3} )
D. ( H_{2} O )
11
1142 Q. 11 In which of the following substances will hydrogen bond be strongest?
(a) HCI
(b) HO
(c) HI
(d) HS
11
1143 4. In SO, molecule, Satom is:
(@) sp hybridized (b) sp hybridized
5. A molecule or ion is stable if
(c) sp hybridized
(d) d sphybridized
11
1144 Which of the following compounds of elements in group IV is expected to be most ionic?
A. ( P b C l_{2} )
в. ( P b C l_{4} )
c. ( C C l_{4} )
D. ( operatorname{sicl}_{4} )
11
1145 Draw the structure of ( B F_{3} ) 11
1146 Select the most ionic and most covalent
compounds respectively from the following.
( boldsymbol{C r} boldsymbol{O}_{5}, boldsymbol{M n}_{2} boldsymbol{O}_{7}, boldsymbol{P b O}, boldsymbol{P}_{4} boldsymbol{O}_{10}, boldsymbol{S n O}_{2} )
A. ( C r O_{5}, M n_{2} O_{7} )
в. ( P b O, M n_{2} O_{7} )
( mathrm{c} cdot mathrm{Cr} mathrm{O}_{5}, P_{4} mathrm{O}_{1} )
D. ( S n O_{2}, C r O_{5} )
11
1147 Which of the following species have maximum number of unpaired electrons?
( A cdot O_{2} )
B. ( O_{2}^{text {t }} )
( c cdot O_{2} )
D. ( O_{2}^{2} )
11
1148 The shape of ( X e F_{6} ) is :
A. square planar
B. distorted octahedral
c. square pyramidal
D. pyramidal
11
1149 Q. 25 CO is isoelectronic with
(a) NO+
(b) N
(c) SnCI,
(d) NOZ
11
1150 The lewis structure of the product that is formed. 11
1151 Which set contains no ionic species?
A. ( N H_{4} C l, O F_{2}, H_{2} S )
в. ( C O_{2}, C C l_{4}, C l_{2} )
c. ( B F_{3}, A l F_{3}, T l F_{3} )
D. ( I_{2}, C a O, C H_{3} C l )
11
1152 During the formation of ( N a C l ), which processes are endothermic?
A. Sublimation
B. Ionization
c. Bond dissociation
D. All of these
11
1153 Which of the following give good synergic bond with metal?
A. ( c o )
в. ( N H_{3} )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. ( C l )
11
1154 Explain hybridization in acetylene? 11
1155 The group of molecules having identical
shape is:
( mathbf{A} cdot B F_{3}, P C l_{3}, X e O_{3} )
B. ( S F_{4}, X e F_{4}, C C I_{4} )
( mathbf{c} cdot P C l_{5}, I F_{5}, X e O_{2} F_{2} )
D. ( C I F_{3}, X e O F_{2}, X e F_{3}^{+} )
11
1156 Which of the following statement is
incorrect for ( boldsymbol{P} boldsymbol{C l}_{5} ) ?
A. Its three P-CI bond lengths are equal
B. It involves ( s p^{3} d ) hybridization
c. It has linear geometry
D. Its shape is trigonal bipyramidal
11
1157 Write the molecular formula for
aluminium
(III) nitrate?
11
1158 Trauguia planta
Q5. Define Hybridisation. Explain sp3 hybridisation with suitable example.
11
1159 What is common between the following molecules?
( boldsymbol{S O}_{3}, boldsymbol{C O}_{3}^{2-}, boldsymbol{N O}_{3}^{-} )
A. All have linear shape
B. All have trigonal planar shape
c. All have tetrahedral shape
D. All have trigonal pyramidal shape
11
1160 Which amongst the following contains a covalent bond?
A. ( M g C l_{2} )
в. ( C a F_{2} )
c. ( A I_{2} O_{3} )
D. ( H C l )
11
1161 The compound with highest lattice
energy is:
A. ( K B r )
в. ( N a B r )
( mathbf{c} cdot L i B r )
D. ( R b B r )
11
1162 Select the correct order of polarising
power of cation.
( mathbf{A} cdot N a^{+}>M g^{+2}>A l^{+3}>S i^{+4} )
B ( cdot S i^{4+}>A l^{3+}>M g^{2+}>N a^{+} )
( mathbf{C} cdot A l^{3+}>M g^{2+} S i^{4+}>N a^{+} )
D. ( M g^{2+}>A l^{3+}>S i^{4+}>N a^{+} )
11
1163 The number of ( angle F I F ) angles which are
less than ( 90^{circ} ) in ( I F_{5} ) are :
( A cdot 8 )
B. 7
( c cdot 6 )
D. 5
11
1164 The hybridization of the central atoms of compounds ( A, B, C ) and ( D ) are
( s p^{3} d, s p^{3}, s p^{2} ) and ( s p ) respectively. If the
compounds ( A ) and ( D ) have the same
shape like ( I_{3}^{-} ) and the compounds ( B ) and ( C ) have the same shape like water
molecule,
then the value of ( boldsymbol{P}+boldsymbol{Q}+boldsymbol{R}+boldsymbol{S} ) is:
(Given that ( P, Q, R ) and ( S ) are the
number of lone pairs of electrons on
central atoms of compounds ( boldsymbol{A}, boldsymbol{B}, boldsymbol{C} ) and ( D ) respectively.
11
1165 In which molecule sulphur atom is not
( boldsymbol{s} boldsymbol{p}^{3} ) -hybridized?
( mathbf{A} cdot S O_{4}^{2} )
в. ( S F_{4} )
c. ( S F_{2} )
D. None of these
11
1166 Which of the following molecules represents the order of hybridisation
( s p^{2}, s p^{2}, s p, s p ) from left to right carbon
atoms?
A ( cdot C H_{2}=C H-C H=C H_{2} )
в. ( H C=C-C equiv C H )
c. ( C H_{3}-C H=C H-C H_{3} )
D. ( C H_{2}=C H-C equiv C H )
11
1167 In Allene ( left(C_{3} H_{4}right), ) the type(s) of
hybridization of the carbon atoms is ( (operatorname{are}) ? )
A. ( s p ) and ( s p^{3} )
B. ( s p ) and ( s p^{2} )
C . only ( s p^{2} )
D. ( s p^{2} ) and ( s p^{3} )
11
1168 Which of the following phenomena will occur when two atoms of the elements
having same spin of electron approach for bonding?
A. Orbital overlap will not occur
B. Bonding will not occur
c. Both ( A ) and ( B ) are correct
D. None of the above
11
1169 Hydrogen bond is a covalent
bond.
A. stronger than
B. weaker than
c. equal in strength to
D. cannot be predicted
11
1170 In which of the above species, starred ( C )
has ( s p^{2} ) hybridisation?
( A cdot p, q )
B. p, q, r
( c cdot p, q, s, t )
( mathbf{D} cdot mathbf{q}, mathbf{s}, mathbf{t} )
11
1171 Nonpolar intramolecular and
intermolecular bonds are present in:
A. ( C C l_{4} )
в. ( C O )
c. ( H F )
D. ( H C l )
E . ( F_{2} )
11
1172 Hybridization state of beryllium atom in
( B e C l_{2} ) molecule is ( x . ) The type of
hybridization changes to ( y ) when ( B e C l_{2} ) transforms to the solid state. Then ( boldsymbol{x}, boldsymbol{y} )
are respectively:
A ( . s p, s p^{2} )
B . ( s p, s p^{3} )
c. ( s p^{2}, s p^{3} )
D. ( s p, s p )
11
1173 Hybridization on carbon in carbonion ( stackrel{Theta}{C} H_{3} ) is:
( A cdot s p^{3} )
B. ( s p^{3} d^{2} )
( c cdot s p^{2} )
D. ( s p^{3} d )
11
1174 Q.10 In which of the following molecule/ion all the bonds are not equal?
(a) XeF4
(b) BF
(c) C,H,
(d) SiF.
11
1175 Select the correct order of first
ionization potential
A. ( N>O_{2} )
в. ( O_{2}>N )
( mathrm{c} cdot O_{2} simeq N )
D. None of these
11
1176 Which one of the following has the regular tetrahedral structure?
A ( cdot mathrm{xeF}_{4} )
в. ( mathrm{SF}_{4} )
( mathrm{c} cdot mathrm{BF}_{4}^{-} )
D. None of the above
11
1177 Consider the following Lewis
Dot structure:
What is the formal charge of right-side
( N ) atom?
[
left[because prod_{0}^{0} ldotsright]^{-}
]
11
1178 Among ( N_{2} O, S O_{2}, I_{3}^{+} ) and ( I_{3}^{-}, ) the linear
species are ( N_{2} O ) and ( I_{3}^{-} )
A . True
B. False
11
1179 Which statements are correct?
This question has multiple correct options
A. Bond energy of ( C equiv O ) and ( N equiv N ) are respectively
1070 and ( 946 k J ) mol( ^{-1} )
B. ( C O ) has resonating structure but ( N_{2} ) not
C. Bond order of both ( C O ) and ( N_{2} ) is three
D. Bond order of both ( C O^{+} ) and ( N_{2}^{+} ) are same
11
1180 This question contains STATEMENT-I (Assertion) and STATEMENT-2 (Reason) and has 4 choices ( (a),(b),(c) ) and ( (d) )
out of which ONLY ONE is correct.
STATEMENT-I: p-Hydroxybenzoic acid has a lower boiling point than o-
hydroxybenzoic acid. STATEMENT-2: 0-Hydroxybenzoic acid has a intramolecular hydrogen bond.
A. Statment-1 is True, Statement-2 is True; Statement-2 is correct explanation for Statement-
B. Statment-l is True, Statement-2 is True; Statement-2 is NOT correct explanation for Statement-
c. Statement-1 is True, Statement-2 is False.
D. Statement-1 is Flase, Statement-2 is True
11
1181 The correct increasing covalent nature
is:
A. ( N a C l<L i C l<B e C l_{2} )
в. ( B e C l_{2}<N a C l< )LiСl
c. ( B e C l_{2}<L i C l<N a C l )
D. ( L i C l<N a C l<B e C l_{2} )
11
1182 According to valence bond theory, the
predicted bond angle for ( boldsymbol{H}_{2} boldsymbol{O} ) is:
A ( cdot 90^{circ} )
B. ( 109^{circ} 28 )
( mathbf{c} cdot 107^{circ} 18 )
D. ( 104^{circ} 28 )
11
1183 Which type of bond carbon atoms forms with other atoms?
A. Ionic bond
B. Hydrogen bond
c. Metallic bond
D. covalent bond
11
1184 The correct order of hybridization of the central atom in the following species is:
( N H_{3},left[P t C l_{4}right]^{2-}, P C l_{5} ) and ( B C l_{3} )
B . ( s p^{3}, d s p^{2}, d s p^{3}, s p^{2} )
C ( cdot d s p^{2}, s p^{2}, s p^{3}, d s p^{3} )
D. ( d s p^{2}, s p^{3}, s p^{2}, d s p^{3} )
11
1185 Which resonance form in each of the
following sets is the major contributor to the real structure?
11
1186 In which pair(s) is/are the stronger bond found in the first species? This question has multiple correct options
A ( cdot O_{2}^{-}, O_{2} )
в. ( N_{2}, N_{2} )
c. ( N O^{+}, N O^{-} )
D. ( C O, O_{2}^{2+} )
11
1187 Assertion
( N ) -atom in ( N H_{3} ) is ( s p^{3} ) hybridised and
bond angle is ( 107^{circ} )
Reason
( l p-b p ) repulsion (VSEPR) decreases
bond angle to ( 107^{circ} )
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
1188 Which of the molecules is trigonal bipyramidal?
A. ( B F_{3} )
в. ( C H_{4} )
c. ( P C l_{5} )
D. ( S F_{6} )
11
1189 Which of the following do not exist as stable molecules?
This question has multiple correct options
A. ( H_{3} )
B. ( H-H e )
c. ( H e_{2} )
D. ( H_{3} O )
11
1190 Which of the following does not give ppt with ( boldsymbol{C r} boldsymbol{O}_{4}^{-2} )
A ( cdot C a^{+} )
B. ( S r^{+} )
( c cdot P b^{+2} )
D. ( B a^{+2} )
11
1191 Number of pi bonds in cyclic structure
of ( boldsymbol{S}_{3} boldsymbol{O}_{9} ) is:
11
1192 Consider the given organometallic compound.
( (mathrm{I})left(boldsymbol{C} boldsymbol{H}_{3}right)_{2} boldsymbol{H} boldsymbol{g} )
(II) ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{Z} boldsymbol{n} )
( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{M} boldsymbol{g} )
( (mid V) C H_{3} L i )
The correct decreasing order of ionic character is :
A. ( I>I I>I I I>I V )
В. ( I I>I>I I I>I V )
c. ( I>I I I>I I>I V )
D. ( I V>I I I>I I>I )
11
1193 Resonance structures of a molecule do
not have.
A. Identical arrangement of atoms
B. Nearly the same energy content
C. The same number of paired electrons
D. Identical bonding
E. All of the above
11
1194 Which of the following molecules is/are dimagnetic?
This question has multiple correct options
A ( cdot L i_{2} )
в. ( B_{2} )
c. ( C_{2} )
D. ( N_{2} )
11
1195 Correct statement regarding this
reaction
( boldsymbol{B} boldsymbol{F}_{3}+boldsymbol{N} boldsymbol{H}_{3} rightarrowleft[boldsymbol{F}_{3} boldsymbol{B} leftarrow boldsymbol{N} boldsymbol{H}_{3}right] )
A. Hybridiration of ( N ) is changed
B. Hybridiration of ( B ) is changed
( mathrm{c} . N H_{3} ) act as a Lewis Base
D. (2)( &(3) ) both
11
1196 A: Tetracyanomethane
B: Carbondioxide
C: Benzene
( mathbf{C}: mathbf{1}, mathbf{3}-boldsymbol{b} boldsymbol{u} boldsymbol{t} boldsymbol{a}-boldsymbol{d} boldsymbol{i}-boldsymbol{e} boldsymbol{n} boldsymbol{e} )
Ratio of ( sigma ) and ( pi: )
A . in A and B are equal
B. in C and D are equal
( c . ) is same in ( A, B, C, ) and ( D )
D. in B and D are equal
11
1197 Q3. Write Lewis symbols for the following atoms and ions: Sand S2-; Al and Alº; H and H 11
1198 The heat of neutralization of HCl by NaOH is ( -55.9 mathrm{kJ} / mathrm{mol} ). If the heat of
neutralization of HCN by NaOH is -12.1 kJ/ mol.

The energy of dissociation of HCN is :
A. -43.8 kJ
B. 43.8 kJ
c. 68 kJ
D . -68kJ

11
1199 In which of the following molecules, central atom used orbitals of different quantum number in the hybridisation :-
( mathbf{A} cdotleft[F e(C O)_{5}right] )
в. ( I F_{7} )
c. ( N i(C O)_{4} )
D. ( X e O_{4} )
11
1200 For which of the following hybridisation, the bond angle is maximum?
( A cdot s p^{2} )
B. ( s p )
( c cdot s p^{3} )
D. ( d s p^{2} )
11
1201 ( H_{2} O ) has a higher boiling point than
HF because:
A. ( H_{2} O ) is more polar than ( H F )
B. ( H_{2} O ) can form more hydrogen bonds
C. ( H_{2} O ) has a higher molecular weight
D. ( H_{2} O ) has more atoms
E. ( H_{2} O ) does not have a higher boiling point that ( H F )
11
1202 014. Which is more polar – Co, or N,O? Give reason. 11
1203 Among the following species, identify the isostructural pairs.
( N F_{3}, N O_{3}^{-}, B F_{3}, H_{3}^{+} O, H N_{3} )
( mathbf{A} cdotleft[N F_{3}, N O_{3}^{-}right] ) and ( left[B F_{3}, H_{3}^{+} Oright] )
B . ( left[N F_{3}, H N_{3}right] ) and ( left[N O_{3}^{-}, B F_{3}right] )
C ( cdotleft[N F_{3}, H_{3}^{+} Oright] ) and ( left[N O_{3}^{-}, B F_{3}right] )
D. ( left[N F_{3}, H_{3}^{+} Oright] ) and ( left[H N_{3}, B F_{3}right] )
11
1204 f Hund’s rule is not applicable, then how many unpaired electrons are present in ( N O ) molecule? 11
1205 The energy required to break ( 76 mathrm{gm} ) gaseous fluorine into free gaseous
atom is 180 Kcal at ( 25^{0} C . ) The bond
energy of F-F bond will be:
A. 180 Kcal
B. 90 Kcal
c. 45 Kcal
D. 104 kcal
11
1206 Which of the following structure is most
expected for molecule ( X e O F_{4} ? )
A. Tetrahedral
B. Square pyramidal
c. Square planar
D. Octahedral
11
1207 Explain the formation of a chemical
bond.
11
1208 In which of the following compounds the carbon marked with asterisk is most
electronegative?
( mathbf{A} cdot C H_{3}-C H_{2}-dot{C} H_{2}-C H_{3} )
в. ( C H_{3}-dot{C H}=C H-C H_{3} )
c. ( C H_{3}-C H_{2}-C equiv dot{C} H )
D. ( C H_{3}-C H_{2}-C H=dot{C} H_{2} )
11
1209 Which of the following have state of hybridization of the central atom not same as in the others?
( A cdot B ) in ( B F_{3} )
B. ( operatorname{oin} H_{3} O^{+} )
c. ( mathrm{N} ) in ( N H_{3} )
D. ( operatorname{Pin} P C l_{3} )
11
1210 Amongst ( N H_{3}, B e C l_{2}, C O_{2} ) and ( H_{2} O )
the non-linear molecules are:
A. ( B e C l_{2} ) and ( H_{2} O )
в. ( B e C l_{2} ) and ( C O_{2} )
c. ( N H_{3} ) and ( H_{2} O )
D. ( N H_{3} ) and ( C O_{2} )
11
1211 What is the shape of the ( I B r_{2}^{-} ) ion?
A. Linear
B. Bent shape with bond angle of about ( 90^{circ} )
C. Bent shape with bond angle of about ( 109^{circ} )
D. Bent shape with bond angle of about ( 120^{circ} )
11
1212 The pair of molecules in which one of
the molecule has linear shape while
another one has square based pyramid
shape is:
( mathbf{A} cdotleft[B r_{3}^{-}, P F_{5}right] )
в. ( C O_{2}, N F_{3} )
( mathrm{c} cdot mathrm{SO}_{2}, mathrm{CIF}_{5} )
D ( cdotleft[l_{3}^{-}, B r_{5}right] )
11
1213 Which of the following is responsible for the relatively high boiling point of
water?
A. Hydrogen bonding
B. lonic bonding
c. Metallic bonding
D. Non-polar covalent bonding
E. Polar covalent bonding
11
1214 State True or False.
Ethyne is a linear molecule.
A. True
B. False
11
1215 Which is not characteristic of ( pi ) -bond?
A. ( pi ) – bond is formed when a sigma bond already formed
B. ( pi ) – bond are formed from hybrid orbitals
C ( . pi ) – bond may be formed by the overlapping of ( p ) orbitals
D. ( pi ) – bond results from lateral overlap of atomic orbitals
11
1216 0.58 Assertion (A) Though the central atom of both NH, and H,0 molecules are
spºhybridised, yet H-N-H bond angle is greater than that of H-0-H.
Reason (R) This is because nitrogen atom has one lone pair and oxygen
atom has two lone pairs.
(a) A and R both are correct and R is the correct explanation of A
(b) A and R both are correct but R is not the correct explanation of A
(c) A is true, but R is false
(d) A and R both are false
11
1217 16. In the compound
CH2 = CH – CH2 – CH2 – C=CH, the C2-C, bond is
of the type:
(a) sp -sp?
(b) sp3 – sp3
(c) sp – sp
(d) sp2 – sp (IIT-JEE 1999)
11
1218 Trimethylamine is a pyramidal molecule and formamide is a planar molecule. Hybridisation of nitrogen in both is:
B . ( s p^{3}, s p^{2} )
( mathrm{c} cdot s p^{3}, s p^{3} )
D. ( s p^{2}, s p )
11
1219 Which has the largest ( boldsymbol{O}-boldsymbol{N}-boldsymbol{O} ) bond
angle?
A ( cdot N O_{2} )
в. ( N O_{2}^{+} )
( mathrm{c} cdot mathrm{N} mathrm{O}_{2}^{-} )
D. ( N O_{3}^{-} )
11
1220 The number of unpaired electrons in a paramagnetic atom of an element with atomic number 16 is : 11
1221 The hybridised state of ( C u ) in
( left[boldsymbol{C u}left(boldsymbol{N} boldsymbol{H}_{3}right)_{4}right]^{2+} ) is:
( mathbf{A} cdot s p )
B ( cdot s p^{2} )
( c cdot s p^{3} )
D. ( d s p^{2} )
11
1222 State True or False.
The bond length decreases with increase in multiplicity of bonds between two atoms.
A. True
B. False
11
1223 The highest bond length is ( boldsymbol{C}-boldsymbol{H}, boldsymbol{C}- )
( boldsymbol{O}, boldsymbol{C}-boldsymbol{C} ) and ( boldsymbol{C}=boldsymbol{C} ) is:
A. ( C-C )
B. ( C-O )
c. ( C-H )
D. ( C=C )
11
1224 Assuming the additivity of covalent radii in the ( C-I ) bond, what would be
the iodine-iodine distance in each of the
diiodobenzene? Assume that the ring is
regular hexagon and that each ( C-I )
bond lies on a line through the centre of the hexagon. (Take ( C-C ) bond-length ( =1.40 A ) radius of iodine atom ( =1.33 dot{A} ) radius of carbon atom ( =0.77 dot{A} ) )
( ln o-, m- ) and ( p- ) isomers, bond
angles are respectively ( 60^{circ}, 120^{circ} ) and
( 180^{circ} . ) Hence, the distance between two-
atoms is:
A . ( 3.5 hat{A} )
в. ( 4.0 hat{A} )
( c .7 .0 hat{A} )
D. ( 8.0 hat{A} )
11
1225 The amount of energy released when
one mole of ionic solid is formed by packing of gaseous ion is called:
A. Ionization energy
B. Solvation energy
c. Lattice energy
D. Hydration energy
11
1226 Compare ( C-O ) bond strength
amongst:
A ( cdot C O>C O_{2}>C O_{3}^{2} )
в. ( C O>C O_{3}^{2-}>C O_{2} )
( c cdot C O_{3}^{2-}>C O_{2}>C O )
D. ( C O<C O_{3}^{2-}<C O_{2} )
11
1227 Which is helpful in the formation of ionic bond?
A. Only small cation
B. Only small anion
c. Small cation and small anion both
D. Low positive charge cation and small anion
11
1228 The correct relationship between the
bond lengths ( a ) and ( b ) is:
( boldsymbol{O} )
( boldsymbol{C H}_{3}-stackrel{|}{boldsymbol{C}}-boldsymbol{O}-boldsymbol{C H}_{3} )
( mathbf{A} cdot a=b )
В. ( b>a )
( c cdot b<a )
D. impossible to predict
11
1229 Which of the following species has a molecular shape similar to that of
ammonia, ( N H_{3} ? )
( A cdot B H_{3} )
в. ( H_{2} O )
( mathrm{c} cdot mathrm{H}_{3} mathrm{O}^{+} )
D. ( C H_{4} )
E ( . N H_{4}^{+} )
11
1230 Suggest reasons why the ( B F ) bond
lengths in ( B F_{3}(130 mathrm{pm}) ) and ( B F_{4}^{-}(143 )
( p m ) ) differ.
11
1231 1 11
1232 There are three elements ( mathrm{E}, mathrm{F}, mathrm{G} ) with
atomic number 19,8 and 17
respectively.Give molecular formula of the compound formed between ( mathrm{E} ) and ( mathrm{G} )
11
1233 Shape of ( left(boldsymbol{S} boldsymbol{i} boldsymbol{H}_{3}right)_{3} boldsymbol{N} ) with respect to ( boldsymbol{N} )
is:
A. pyramidal
B. tetrahedral
c. trigonal planar
D. T-shaped
11
1234 Draw the electron dot stucture of a
molecule of sulphur which is made up
of eight atoms of sulphur.
( A )
B. ( S F_{4} )
( c cdot S_{8} )
D. None of the above
11
1235 If shape of anion is tetrahedral, then the shape of cation formed is :
A. Linear
B. Bent
c. Pentagonal bipyramidal
D. Trigonal planar
11
1236 Q. 20 Which of the following is not tetrahedral in shape!
(a) NH
(b) Sica (c) SF.
(d) SO4
11
1237 In the formation of ( N_{2}^{+} ) from ( N_{2} ), the electron is lost from:
( mathbf{A} cdot ) a ( sigma ) -orbital
B . a ( pi ) -orbital
c. a ( sigma^{*} ) -orbital
D. a ( pi^{*} ) -orbital
11
1238 Which of the following is correct electron dot structure of oxygen?
( A )
[
therefore dot{0}: therefore dot{0}:
]
в.
[
therefore dot{0}: stackrel{because}{0}:
]
( c )
[
therefore 0:: 0:
]
D.
[
therefore dot{0}:: dot{0}
]
11
1239 The type of hybrid orbitals used by chlorine atom in ( C l O^{-}, C l O_{2}^{-}, C l O_{3}^{-} )
and ( C l O_{4}^{-} ) is/are:
A ( cdot s p, s p^{2}, s p^{3} ) and ( s p^{3} d )
B. ( s p ) and ( s p )
C . only ( s p^{3} )
D. only sp
11
1240 Titanium tetrachloride, ( boldsymbol{T} boldsymbol{i} boldsymbol{C} boldsymbol{l}_{4}, ) is a
liquid at room temperature and has a very high vapor pressure. Which statement best explains these
observations?
A. Titanium tetrachloride is an ionic compound, with ( T i^{4+} ) and ( C l^{-} ) ions arranged in a lattice
B. Titanium tetrachloride is a molecular substance, with
( T i C l_{4} ) molecules held together by covalent bonds
c. The bonding in titanium tetrachloride is metallic, with a sea of electrons being shared equally between all the atoms in a sample.
D. Titanium tetrachloride is a network covalent substance, with an essentially infinite lattice of covalently-bonded ( T i ) and ( C l ) atoms
E. Titanium tetrachloride is simply a mixture of titanium atoms and chlorine atoms, which are not bonded to each other in any particular way
11
1241 The octet rule is not obeyed by which of the following molecule:
A. ( C O_{2} )
в. ( H_{2} ) о
( c cdot O_{2} )
D. ( C O )
11
1242 toppr LoGin non
Q Type your question_
bonding.
Sample ( quad ) Appearance ( quad ) Melting
[
begin{array}{l}text { Point } \ left(^{circ} Cright)end{array}
] and
condu
onduc
aqueo begin{tabular}{llll}
( mathrm{A} ) & Shiny & 962 & ( mathrm{co} ) \
( mathrm{B} ) & Crystalline & 801 & ( mathrm{a} ) \
& & & ( mathrm{sol} ) \
( mathrm{C} ) & Powdery & 186 & ( mathrm{not} ) ( mathrm{co} ) \
hline
end{tabular} onduc
Based on this data, identify the type of bonds present in each sample.
A. Sample A is a metal.
Sample B is a salt.
Sample ( C ) is a molecule
B. Sample A is a molecule
Sample B is a metal.
Sample ( c ) is a salt.
c. Sample A is a salt.
Sample B is a metal.
Sample ( C ) is a molecule.
D. Sample A is a molecule.
( B ) is a salt
Sample C is a metal.
11
1243 In ionic bond formation octet is
completed
A. True
B. False
11
1244 Draw the molecular orbital formed on
sideways overlap of ( 2 p_{x} ) with ( 2 p_{x} )
11
1245 Assertion: The most important factor in determining the chemical properties of an element is the number of electrons
in the outermost shell.

Statement 2 : The number of electrons
in the outer shell determines the
bonding characteristics of the element.
A. Both Assertion and Reason are correct and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are correct and Reason is not the correct explanation of Assertion
c. Assertion is correct but Reason is not correct
D. Assertion is not correct but Reason is correct
E. Both the Assertion and Reason are not correct

11
1246 Which of the following has weakest ( boldsymbol{H}- )
bond?
A ( . H-F )
в. ( O-H )
c. ( N-H )
D. ( C-H )
11
1247 Which of the following elements forms double or triple bonds involving ( boldsymbol{p}-boldsymbol{p} )
bonding?
A. Carbon
B. Silicon
c. Germanium
D. Tin
11
1248 08. Although geometries of NH, and H,O molecules are distorted tetrahedral, bond angle in water
is less than that of ammonia. Discuss.
11
1249 Assertion
lonic bonds are directional in nature
whereas covalent bonds are non-
directional.
Reason
According to orbital overlap concept,
the formation of a covalent bond
between two atoms results by pairing of electrons present in the valence shell
having same spins.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1250 An electrovalent bond is formed
between
A. Two electronegative atoms
B. Two metals
c. Electropositive and electronegative atoms
D. Two electropositive atoms
11
1251 The octet rule is not obeyed in:
This question has multiple correct options
A. ( C O_{2} )
в. ( B C l_{3} )
c. ( P C l_{5} )
D. ( S i F_{4} )
11
1252 Correct wrong statements if found any from those given below:
(a) When difference in electronegativity increases, the possibility of covalent bonding increases.
(b) Electronegativity increases while moving from left to right along a period.
(c) lonic bond is present in ( boldsymbol{H} boldsymbol{C l} ) molecule.
(d) Partial ionic bond is also there in
polar molecule
11
1253 01. How is bond order related to the stability of a molecule?
TT. I
11
1254 Molecules/ions and their magnetic
properties are given below
Molecule/lon Magnetic property
(i) ( C_{6} H_{6} )
(1) Antiferromagnetic
(ii) ( C r O_{2} )
(2) Ferrimagnetic
(iii) ( M n O )
(3) Ferromagnetic
(iv) ( F e_{3} O_{4} )
(4) Paramagnetic
(v) ( F e^{3+} )
(5) Diamagnetic
The correctly matched pairs in the above is:
A. ( i-5 i i-3 ) iii -2 iv ( -1 v-4 )
B. ( i-3 ) ii -5 iii -1 iv ( -4 v-2 )
c. ( i-5 ) ii -3 iii -1 iv ( -2 v-4 )
D. ( i-5 ) ii -3 iii -1 iv ( -4 v-2 )
E . ( i-4 i i-5 ) iii -1 iv ( -2 v-3 )
11
1255 The number of bonding pairs electron
( (X) ) and lone pairs electron ( (Y) ) around
the central atom in the ( I_{3}^{-} ) ion are ( X+ )
( Y: )
A .22
B. 23
( c .32 )
D. 43
11
1256 The hybridisation of carbon in diamond, graphite and acetylene is:
B. ( s p, s p^{2}, s p^{3} )
( mathbf{c} cdot s p^{3}, s p^{2}, s p )
( mathbf{D} cdot s p^{2}, s p^{3}, s p )
11
1257 Which of the following element is formed as a result of transfer of one
valence electron?
A. Sodium chloride
B. Calcium oxide
c. Magnesium chloride
D. All of the above
11
1258 Which one is most ionic:
A ( cdot P_{2} O_{5} )
B. ( C r O_{3} )
c. ( M n O )
D. ( M n_{2} O_{7} )
11
1259 Draw electron dot structure of ethyne 11
1260 Q25. Describe the change in hybridisation (if any) of the Al atom in the following reaction.
AICI, + CV- AICI
11
1261 Which one of the following is a correct
set?
A ( cdot C l_{2} O, s p^{3}, ) Angular
B. ( B F_{3}, s p^{2}, ) T-shape
C. ( S O_{3}, s p^{3}, ) Trigonal pyramidal
D. ( N O_{2}, s p, ) Linear
E. ( S F_{4}, s p^{3} d^{2}, ) Square pyramidal
11
1262 Which is maximum covalent in nature?
( mathbf{A} cdot B e C l_{2} )
в. ( M g C l_{2} )
c. ( C a C l_{2} )
D. ( B a C l_{2} )
11
1263 Draw the structure of ( O_{3} ) and ( N O_{2} ) 11
1264 Q33. Explain the formation of H, molecule on the basis of valence bond theory. 11
1265 Which of the following statements is true about hydrogen bonding?
A. ( C l ) and ( N ) have comparable electronegativities yet there is no ( H ) -bonding in ( H C I ) because size of ( C l ) is large
B. Intermolecular ( H ) – bonding results in decrease in ( mathrm{m} ). and b.
C . lce has maximum density at ( 0^{circ} mathrm{C} ) due to ( H ) -bonding
D. ( K H C l_{2}left(H C l_{2}^{-}right) ) exists but ( K H F_{2}left(H F_{2}^{-}right) ) does not exist due to lack of ( H ) -bonding in ( H C l )
11
1266 Hybridisation of central atom in ( boldsymbol{N} boldsymbol{F}_{3} )
is:
( A cdot s p^{3} )
B . ( s p )
( c cdot s p^{2} )
D. ( d s p^{2} )
11
1267 Arrange the following in increasing lattice energy: ( L i F, L i B r, L i I ) 11
1268 Explain the formation of nitrogen
molecule.
A.
11
1269 If true enter 1 , else enter 0 .
The oppositely charged ion pair is more stable than the separated ions.
11
1270 When 2 hydrogen atoms combine to
form ( boldsymbol{H}_{2} ) molecule, the system
A. becomes stable and bond is covalent in nature
B. becomes unstable
c. becomes stable and bond is ionic in nature
D. becomes unstable and bond is metallic in nature
11
1271 Write the Lewis dot structure of ( C O )
molecule.
11
1272 Beryllium atom in beryllium fluoride is:
A ( cdot s p^{3} ) hybridised
B. ( s p^{2} ) hybridised
c. sp hybridised
D. Unhybridised
11
1273 Find the maximum possible number of
hydrogen bonds in which ( boldsymbol{H}_{2} boldsymbol{O}_{2} )
molecule can participate.
11
1274 Molecules with multiple bonds between dissimilar atoms e.g., ( boldsymbol{O}=boldsymbol{C}= )
( boldsymbol{O}, boldsymbol{O}=boldsymbol{S}=boldsymbol{O} . ) How many ( mathbf{S} mathbf{0} boldsymbol{pi} ) bonds
are present in ( S O_{3} ), etc.
11
1275 Which set of molecules is polar?
A. ( operatorname{XeF}_{4}, I F_{7}, S O_{3} )
в. ( P C l_{5}, C_{6} H_{6} )
c. ( operatorname{sn} C l_{2}, s O_{2}, N O_{2} )
D. ( C O_{2}, C S_{2}, C_{2} H_{6} )
11
1276 Which of the following has highest ratio of reducting hydrogen / OH?
A. Orthophosphroric acid
B. Hypophosphorus acid
c. Phosphorus acid
D. Pyrophosphoric acid
11
1277 Which of the following pairs of elements form oxides of polyanions and polycations respectively:
A. ( S i ) and ( A l )
B. ( C u ) and ( S i )
c. ( A l ) and ( B )
D. ( T i ) and ( A s )
11
1278 Shape of ( N H_{3} ) is very similar to:
This question has multiple correct options
A ( cdot operatorname{Se} O_{3}^{2-} )
B. ( C H_{3}^{-} )
( mathbf{c} . B H_{3} )
D. ( C H_{3}^{+} )
11
1279 Select pair of compounds in which both have different hybridization but have
same molecular geometry.
A. ( B F_{3}, B r F_{3} )
в. ( I C l_{2}^{-}, B e C l_{2} )
c. ( B C l_{3}, P C l_{3} )
D. ( P C l_{3}, N C l_{3} )
11
1280 Which type of bond is not present in
( boldsymbol{H} boldsymbol{N} boldsymbol{O}_{3} ) molecule?
A. Covalent
B. Ionic
c. Dative
D . ( p_{pi}-p_{pi} )
11
1281 How many nodal planes are present in ( delta ) bonding molecular orbital? 11
1282 The force responsible for the union of
two ice blocks into a single block is:
A. van der waals force
B. hydrogen bonds
c. dipole interaction
D. van der waals repulsion
11
1283 Which of the following has no lone pair
over the central atom?
A ( . N H_{3} )
в. ( P H_{3} )
( mathrm{c} cdot B F_{3} )
D. ( P C l_{3} )
11
1284 Number of unpaired electrons in
( boldsymbol{O}_{2}left[boldsymbol{A} boldsymbol{s} boldsymbol{F}_{4}right] ) is :
11
1285 What would be the electron dot
structure of a molecule of sulphur
which is made up of eight atoms of sulphur?
11
1286 Which of the following conditions apply to resonating structures? This question has multiple correct options
A. The contributing structures should have nearly same energies.
B. The contributing structures should be represented such that like charges reside on atoms that are far
C. The more electropositive element should preferably have positive charge and more electronegative element should have negative charge
D. The contributing structures must have the same number of unpaired electrons
11
1287 Correct order of dissociation energy of
( N_{2} ) and ( N_{2}+ ) is:
A ( cdot N_{2}>N_{2}^{+} )
B. ( N_{2}=N_{2}^{+} )
c. ( N_{2}<N_{2}^{+} )
D. none of these
11
1288 Which of the following molecules has two lone pairs and bond angle (need not
be all bond angles) ( <109.5^{circ} ? )
( mathbf{A} cdot S F_{2} )
в. ( K r F_{4} )
( mathbf{c} cdot I O I_{4}^{-} )
D. All of the above
11
1289 Which of the following is a nondirectional bond?
A . covalent
B. electrovalent
c. coordinate-covalent
D. none of these
11
1290 Bond ( X ) is made by the overlap of which type of hybridized orbitals?
A. sp and ( s p^{3} )
B. ( s p ) and ( s p^{2} )
( mathbf{c} cdot s p^{2} ) and ( s p^{3} )
D. none of these
11
1291 Which gas has the highest partial pressure atmosphere?
A. ( C O_{2} )
в. ( H_{2} ) о
( c cdot O_{2} )
D. ( N_{2} )
11
1292 It has been observed that the ratio of the
molar heat of vaporization of liquid and its normal boiling point is approximately same for most of the liquids (called Trouton’s rule). Which of the following does not follow this rule?
A. ( C_{6} H_{6} )
в. ( C_{6} H_{14} )
c. ( C C l_{4} )
D. ( N H_{3} )
11
1293 What is a Chemical bond? 11
1294 Which of the following would not have a dipole moment?
(i) ( boldsymbol{C C l}_{mathbf{4}} )
( (i i i) 1,2- )
dichloroacetylene
(ii) trans-1, 2-dichloroethene
( boldsymbol{C H}_{2} boldsymbol{C l}_{2} )
( A cdot ) (i) and (iv)
B. (i), (ii) and (iv)
C . (i), (ii) and (iii)
D. (ii) and (iii)
11
1295 The bond angle in ammonia is ( 109^{circ} 28^{prime} )
A. True
B. False
11
1296 Which of these molecules have non-
bonding electron pairs on the central
atom?
( mathbf{I}: boldsymbol{S} boldsymbol{F}_{mathbf{4}} quad |: boldsymbol{I} boldsymbol{C} boldsymbol{l}_{3} )
( | mathrm{II}: boldsymbol{S} boldsymbol{O}_{2} )
A. II only
B. I and II only
c. I and III only
D. I, II and III
11
1297 The calculated bond order in ( boldsymbol{H}_{2}^{-} ) ion is :
A . 12
в. ( 1 / 2 )
c. ( -1 / 2 )
D.
11
1298 Number of unpaired electron(s) in ( boldsymbol{O}_{2} ) is/are: 11
1299 Which of the following molecules contains only ( pi ) bond?
( mathbf{A} cdot B_{2} )
в. ( C_{2} )
( mathbf{c} cdot C_{2} H_{2} )
D. Both (1) & (2)
11
1300 The least stable hydride of 15 th group elements is
A ( . N H_{3} )
в. ( P H_{3} )
c. ( A s H_{3} )
D. ( B i H_{3} )
11
1301 Choose an incorrect statement.
( mathbf{A} cdot operatorname{In} C O_{2} ) molecule both ( pi ) -bond’s plane are
perpendicular of each other
B. ( C O_{2} ) is gas while ( S i O_{2} ) is solid
C ( cdot ln P_{4} ) molecule there are total six ( P-P ) linkage
D. In ( S_{8} ) molecule there are 16 lone pairs while in ( P_{4} ) molecule there are 8 lone pairs
11
1302 Bond energies in ( N O, N O^{+} ) and ( N O^{-} )
are such that:
A. ( N O>N O^{+}>N O^{-} )
В. ( N O^{-}>N O>N O^{+} )
c. ( N O^{+}>N O^{-}>N O )
D. ( N O^{+}>N O>N O )
11
1303 A diatomic molecule has a dipole moment equal to 1.2 D. If the bond length
is ( 1 A^{0}, ) what fraction of electronic
charge ( ^{prime} e^{prime} ) exists on each atom.
11
1304 What will be the bond order of the
species with electronic configuration
( 1 s^{2} 2 s^{2} 2 p^{5} ? )
A. one
B. Two
c. Three
D. zero
11
1305 Which of the following chemical bonds
has most ionic character?
A . ( L i H )
в. ( H F )
( mathrm{c} . mathrm{CsH} )
D. ( H I )
11
1306 Draw simple diagrams to show how electrons are arranged are arranged in the following molecules:
a) Calcium oxide (CaO)
b) Water ( left(H_{2} Oright) )
c)Chlorine ( left(C l_{2}right) )
11
1307 Draw the electron dot stucture of ( F_{2} )
(fluroine)
11
1308 Which of the following is a true
property about ( C H_{3}^{+} ? )
A. It is a non-planar species.
B. ( C^{+} ) is ( s p^{2} ) hybridised.
C. Electrophile can attack on ( C^{+} ) of ( C H_{3}^{+} )
D. It is an example of carbene.
11
1309 The correct order of dipole moments is :
A ( cdot C H_{4}<N F_{3}<N H_{3}<H_{2} O )
в. ( N F_{3}<C H_{4}<N H_{3}<H_{2} O )
c. ( N H_{3}<N F_{3}<C H_{4}<H_{2} O )
D. ( H_{2} O<N H_{3}<N F_{3}<C H_{4} )
11
1310 The molecular shapes of ( S F_{4}, C F_{4} ) and
( boldsymbol{X} boldsymbol{e} boldsymbol{F}_{4} )
A. differ with 1,0 and 2 lone pairs of electrons on the central atom, respectively.
B. differ with 0,1 and 2 lone pairs of electrons on the central atom, respectively.
c. are same with 1,1 and 1 lone pair of electrons on the central atom, respectively.
D. are same with 2,0 and 1 lone pair of electrons on the central atom, respectively.
11
1311 Which among the following have zero
dipole moment?
( A cdot operatorname{cis}-C_{2} H_{2} C l_{2} )
B. trans- ( C_{2} H_{2} C l_{2} )
c. ( P C l_{3} )
D. 2-Pentene
11
1312 Assertion
Generally, covalent compounds are gases, liquids or soft solids at room temperature.
Reason
Between covalent compounds Vander
Waal’s forces of attraction exists.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
1313 Which one of the following order is
correct for the bond energies?
( mathbf{A} cdot I_{2}>mathrm{Cl}_{2}>mathrm{Br}_{2} )
B. ( mathrm{Br}_{2}>mathrm{Cl}_{2}>mathrm{I}_{2} )
( mathbf{C} cdot I_{2}>mathrm{Br}_{2}>mathrm{Cl}_{2} )
( mathbf{D} cdot mathrm{Cl}_{2}>mathrm{Br}_{2}>mathrm{I}_{2} )
11
1314 Which of the following statements
is/are not correct?
This question has multiple correct options
A. ( pi ) – bond always exists with sigma -bond according to Valence Bond Theory
B. ( pi ) – bond can exist independently according to Valence Bond Theory
C ( . sigma ) – bond is weaker than pi-bond
D. ( pi ) – bond is less reactive than sigma-bond
11
1315 Number of lone pair of electrons present
on the central atom of ( N O_{2}^{-} ) ion is?
A. zero
B. 1
( c cdot 2 )
D. 3
11
1316 Suppose a gaseous mixture of ( H e, N e, A r, K r ) is irradiated with photons of frequency appropriate to
ionize ( A r . ) What ions will be present in the mixture?
( mathbf{A} cdot A r^{+} )
в. ( K r^{+} )
( mathrm{c} cdot mathrm{He}^{+} )
D. Both ( A ) and ( B )
11
1317 Among the following, the molecule that will have the highest dipole moment is :
A. ( H_{2} )
в. ( H I )
c. ( H B r )
D. HCl
E . ( H F )
11
1318 Q7. Arrange 0%, 0,70,-, o, in increasing order of bond energy. 11
1319 Ethane, with the molecular formula
( C_{2} H_{6} ) has:
A. 6 covalent bonds
B. 7 covalent bonds
c. 8 covalent bonds
D. 9 covalent bonds
11
1320 Assertion
Fluorine molecule has bond order one.
Reason

The number of electrons in antibonding
molecular orbitals is two less than in
bonding molecule orbitals.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct

11
1321 Which of the following compounds do
not contain covalent bond?
A ( . C H_{4} )
в. ( M g C l_{2} )
c. ( operatorname{sicl}_{4} )
D. ( N H_{3} )
11
1322 Q11. Define covalent bond according to orbital concept? 11
1323 Number of electrons present in the antibonding axially overlapping orbital
in ( N O^{+}, ) are:
A .4
B . 2
( c .6 )
D.
11
1324 Which is paramagnetic and coloured?
A. ( K_{2} C r_{2} O_{7} )
B ( cdotleft(N H_{4}right)_{2}left[T i C l_{6}right] )
( c cdot v O S O_{4} )
D. ( K_{3}left[C u(C N)_{4}right] )
11
1325 46. Which among the following is
a covalent compound ?
(1) Calcium chloride
(2) Magnesium fluoride
(3) Sodium chloride
(4) Carbon tetrachloride
11
1326 Q16. Write the significance/applications of dipole moment. 11
1327 Statement I : The reaction of BaCl
and ( N a_{2} S O_{4} ) doesnt go to completion.
Because

Statement II : The compound barium sulfate is formed
A. Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.
B. Both the Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.
c. Statement 1 is correct but Statement 2 is not correct.
D. Statement 1 is not correct but Statement 2 is correct
E. Both the Statement 1 and Statement 2 are not correct

11
1328 toppr
Q Type your question
drew the following diagrams ( a, b, c ) and among which three were considered
wrong and one correct by the teacher.
Guess the correct potential energy diagram and justify it.
( A )
B.
( c )
distanc
( D )
11
1329 Which of the following statements is
correct for ( boldsymbol{C} boldsymbol{s} boldsymbol{B} boldsymbol{r}_{3} )
A. It is covalent compound
B. It contains ( C s^{3+} ) and ( B r )
c. It contains ( C s^{+} ) and ( B r_{3}^{-} )
D. It contains ( C s^{+} ) and ( B r^{-} ) and lattice ( B r_{2} ) molecule
11
1330 Correct order of boun angle of the
following is?
A. ( C l O_{2}>O C l_{2}>O F F_{2} )
в. ( O F_{1}>O C l_{2}>C l_{2} O )
c. ( O C l_{2}>C l O_{2}>O F_{2} )
D. ( O C l_{2}>O F_{2}>C l O_{2} )
11
1331 Assertion
Dipole moment of bromobenzene is same as chloro benzene.
Reason
Dipole moment of ( C l-C ) bond is
greater than ( B r-C ) bond.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
1332 The hybridisation of ( N i ) in ( N i(C O)_{4} ) is:
( A cdot s p^{2} )
В. ( d s p^{2} )
( c cdot s p^{3} )
D. ( s p^{3} d )
11
1333 The bond order of ( H e_{2}^{+} ) molecule ion is:
A .
B. 2
( c cdot frac{1}{2} )
D.
11
1334 Which among the following has highest melting point?
A ( cdotleft(C H_{3} C Oright)_{2} O )
в. ( C H_{3} C N )
c. ( C H_{3} C O N H_{2} )
D. ( C H_{3} C O C l )
11
1335 What is the nature of bond in ( C a H_{2} ? ) 11
1336 Assertion
Li ( F ) has more covalent character than
( C s F )
Reason
Lattice energy of ( C s F ) is less than that
of ( boldsymbol{L} boldsymbol{i} boldsymbol{F} )
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1337 How many ( sigma ) bonds are present in
( boldsymbol{H}_{2} boldsymbol{N}-boldsymbol{N} boldsymbol{O}_{2} ? )
11
1338 What is meant by term bond order?
Write bond orders for ( N_{2}, O_{2} )
11
1339 ( M g^{2+} O^{2-} ) is formed since :
A. IE of ( M g ) is low
B. EA of ( O ) is low
c. IE of ( M g ) is high
D. IE of ( O ) is low
11
1340 How many covalent bonds are there in a molecule of ethane ( left(C_{2} H_{6}right) ? ) 11
1341 Which of the following has maximum hydrogen bonding?
A. Ethyl amine
B. Ammonia
c. Ethanol
D. Diethyl ether
11
1342 The number of nodal planes in ( p_{x} ) orbital is ?
( mathbf{A} cdot mathbf{1} )
B. 2
( c cdot 3 )
D.
11
1343 The pair of species with similar shape
is :
A ( cdot P C l_{3}, N H_{3} )
B ( cdot C F_{4}, S F_{4} )
c. ( P b C l_{2}, C O_{2} )
D ( cdot P F_{5}, I F_{5} )
11
1344 How many atom(s) of ( B F_{2}- ) lie in the
same plane?
11
1345 Which of the following has the smallest bond length?
A . ( N O^{+} )
в. ( N O )
( c cdot N O )
D. Equal
11
1346 Which of the following molecules
possess same shape as ( boldsymbol{H}_{3} boldsymbol{O}^{+} ) ? This question has multiple correct options
( mathbf{A} cdot N H_{4}^{+} )
в. ( N H_{3} )
( mathrm{c} . P H_{3} )
D. ( C H_{4} )
11
1347 The geometry of the molecule having sand p-characters equal to ( 25 % ) and ( 75 % ) respectively is:
A. trigonal
B. linear
c. tetrahedral
D. octahedral
11
1348 Which of the following molecules contain odd electron bonds?
This question has multiple correct options
( A cdot H_{2} O )
B. ( N O )
( c cdot N O_{2} )
D. ( C l O_{2} )
11
1349 Which pair of molecules will have a permanent dipole moment for both
members?
A. ( N O_{2} ) and ( O_{3} )
B. ( operatorname{SiF}_{4} ) and ( C O_{2} )
c. ( operatorname{SiF}_{4} ) and ( N O_{2} )
D. ( N O_{2} ) and ( C O_{2} )
11
1350 Which of the following is diamagnetic?
( A cdot O_{2} )
в. ( C O )
c. ( B_{2} )
D. ( N O )
11
1351 In ( N O_{3}^{-} ) ion, the number of bond pairs
and lone pairs of electrons on nitrogen
atom are:
A .2,2
B. 3,
( c cdot 1,3 )
D. 3, o
11
1352 Which of the following compounds does not have a trigonal planar geometry?
A ( . B H_{3} )
B. ( C O_{3}^{2} )
( mathrm{c} cdot mathrm{SO}_{3}^{2-} )
D. ( N O_{3} )
11
1353 In ( B r F_{3} ) molecule, the lone pairs
occupy equatorial positions to
minimize:
A. bond pair bond pair repulsion only
B. Ione pair lone pair repulsion and lone pair bond pair repulsion
C. lone pairlone pair repulsion only
D. lone pairbond pair repulsion only
11
1354 Give reasons for the following
statements
Why covalent compounds
(i) are bad conductors of electricity.
(ii) have low melting and boiling points.
11
1355 Q. 36 A reaction between ammonia and boron trifluoride is given below.
:NH3 + BF3 – H3N:BF3
Identify the acid and base in this reaction. Which theory explains it?
What is the hybridisation of B and N in the reactants?
Althout
11
1356 The number and type of bonds between
two carbon atoms in calcium carbide
are:
A. one ( sigma ), one ( pi )
B. One ( sigma ), two ( pi )
c. Two ( sigma ), one ( pi )
D. None of these
11
1357 Critical temperature of ( N_{2}, C O ) and
( C H_{4} ) are 126,134 and ( 190 mathrm{K} )
respectively. Arrange them in increasing order of adsorption on the surface of activated charcoal?
11
1358 Q. 1 Isostructural species are those which have the same shape and
hybridisation. Among the given species identify the isostructural pairs.
(a) [NF and BE]
(b) [BF. and NH)
(c) [BC], and BrС13]
(d) INH, and NO3]
11
1359 Hydrogen bonding can exist between two molecules or within a single molecule.
A. True
B. False
11
1360 The bond dissociation energy needed to form the benzyl radical from toluene is
the formation of the methyl radical from methane.
A. less than
B. greater than
c. equal to
D. greater than or equal to
11
1361 Select pair of compounds in which both have different hybridization but have the same molecular geometry.
A. ( B F_{3}, B r F_{3} )
B . ( I C l_{2}^{-}, B e C l_{2} )
c. ( B C l_{3}, P C l_{3} )
D. ( P C l_{3}, N C l_{3} )
11
1362 How many anti bonding electrons are
there in ( O_{2} ) molecule?
A . 10
B. 8
( c cdot 6 )
D.
11
1363 Linear overlapping of any two pure atomic ( p ) – orbitals lead to sigma bond formation.
A. True
B. False
11
1364 When a group IIA atom forms an ion, what charge does it have?
( A cdot+2 )
B . – –
( c cdot+3 )
( D cdot-3 )
E. None. It is neutral.
11
1365 Which of the following molecule has a planar structure?
( A cdot O_{2} S F_{2} )
в. ( O S F_{2} )
c. ( X e F_{4} )
( mathbf{D} cdot C l O_{4}^{-} )
11
1366 Number of covalent bonds present in
( boldsymbol{C} boldsymbol{a}(boldsymbol{O} boldsymbol{C l})_{2} )
11
1367 Select the correct statement.
( mathbf{A} cdot ) The ( S-F ) bond length is longer in ( S F_{6} ) compared to
that in ( S F_{2} )
B. In ( P C l_{5} ) axial bonds are smaller than of equatorial bonds.
C ( cdot ln I F_{7} ) axial bonds are longer than that of equatorial bonds
D. All are correct.
11
1368 Which of the following is an ionic compound?
A. ( C a C_{2} )
в. ( N a H )
c. ( B e C l_{2} )
D. ( B F_{3} )
11
1369 Which one of the following is incorrect?
A. The bond order of ( H_{2}, N_{2} ) and ( O_{2} ) follows the order:
( N_{2}>O_{2}>H_{2} )
B. In ( C s C I ) lattice, each ( C s ) is surrounded by ( 8 C l^{-} ) ions
C. The ionic nature of ( K C l, M g C l_{2} ) and ( A l C l_{3} ) follows the
order: ( K C l>M g C l_{2}>A l C l_{3} )
D. The central atoms in ( P F_{3}, C l F_{3} ) and ( X e F_{2} ) have ( s p^{3} d ) hybridisation
11
1370 Which is more ionic?
( N a F, N a C l, N a B r, N a I )
11
1371 Molecular orbital theory could be used to explain the bonding in ( S i F_{6}^{2-} ) and the shape of this ion is octahedral. 11
1372 Consider the following statements.
( S_{1}: ) The percentage of s-character in the
orbital forming ( S-S ) bonds and ( P-P )
bonds in ( S_{8} ) and ( P_{4} ) molecules respectively are same.
( S_{2}: ln S F_{4} ) the bond angles, instead of
being ( 90^{circ} ) and ( 180^{circ} ) are ( 89^{circ} ) and ( 177^{circ} ) respectively due to the repulsions between lone pair and bond pairs of electrons.
( S_{3}: ) Aqueous ( H_{3} P O_{4} ) is syrupy (i.e more viscous than water)
( S_{4}: S i O_{2} ) crystal maybe considered as giant molecule in which eightmembered rings are formed with alternate silicon and oxygen atoms of these:
A. ( S_{1} & S_{4} ) are correct only
B . ( S_{2}, S_{3} & S_{4} ) are correct only.
c. ( S_{1}, S_{2}, S_{3} & S_{4} ) are correct
D. ( S_{1}, S_{2} & S_{3} ) are correct only.
11
1373 ( pi ) bond is formed by:
A. overlapping of hybridised orbitals
B. overlapping of s-s orbitals
C. head on overlapping of ( p ) -p orbitals
D. ( p-p ) collateral overlapping
11
1374 Oxygen molecule is formed by:
A. one axial ( s ) -s overlap and one ( p ) – ( p ) axial overlap
B. two ( p ) – ( p ) axial overlap
C . two ( p-p ) sidewise overlap
D. one ( p-p ) axial and one ( p-p ) sidewise overlap.
11
1375 Assertion
O ( _{2} ) is paramagenetic in nature.
Reason
Bond-order of oxygen is two.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is
not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
1376 Nitrogen molecule, in which each nitrogen atom has electrons
in its valence shell and required three electrons to complete the octet.
A. 5
B. 4
( c cdot 3 )
( D .2 )
11
1377 Type of hybridisation in transition state
of ( S e F_{4}, ) when it undergoes in
hydrolysis:
B. ( s p^{3} d^{2} )
( mathbf{c} cdot d s p^{3} )
D. ( s p^{3} )
11
1378 In which of the following molecule/ion all the bonds are not equal?
A. ( X e F_{4} )
B. ( B F_{4}^{-} )
( mathbf{c} cdot C_{2} H_{4} )
D. ( operatorname{siF}_{4} )
11
1379 Sodium chloride is an ionic compound
where as hydrogen chloride is mainly covalent because
A. sodium is less reactive
B. hydrogen is non-metal
C. hydrogen chloride is a gas
D. electronegativity difference in the case of Hydrogen and chlorine is less than 2.1
11
1380 Write about hydrogen bonding in ice
and water.
11
1381 In dimethyl ether, oxygen is tetrahedrally hybridized the bond angle
is ( _{–}^{o}(110 / 119) )
11
1382 The maximum possible number of hydrogen bonds, a water molecule can form is?
A .4
B. 3
( c cdot 2 )
D.
11
1383 Which of the following has the strongest H-bond?
A. ( 0-H ldots . . . )
B. S-H….0
c. F-H…F
D. F-H…0
11
1384 The hybridization and geometry of
Br ( F_{3} ) molecules are:
A ( cdot s p^{3} d ) and ( T ) -shaped
B ( cdot s p^{3} d^{2} ) and tetragonal
( mathrm{c} cdot s p^{3} d ) and bent
D. none of these
11
1385 Which of the following compound contains both ionic and covalent bonds?
( mathbf{A} cdot K C N )
в. ( N a C l )
c. ( H C l )
D. ( A l C l_{3} )
11
1386 Write down correct order of covalent
character of the following.
( mathbf{a} cdot mathbf{L i C I}, mathbf{N a C l}, mathbf{R b C l}, mathbf{K C} )
b. ( mathrm{NaCl}, mathrm{Mg} C l_{2}, mathrm{Si} C l_{4} )
c. ( operatorname{sn} C l_{2}, operatorname{sn} C l 4 )
11
1387 Which of the following is more covalent among the following and why?
1) Cuo and Cus
2)AgCI and Agl
3) ( P b c l_{2} ) and ( p b C l_{4} )
4)NaCl and CuCl
11
1388 The valence electrons are involved in
formation of covalent bonds is/are
called:
A. non-bonding electrons
B. Ione pairs
c. unshared pairs
D. None of these
11
1389 The species having bond order different
from that in CO is:
A . ( N O )
B. ( N O^{+} )
c. ( C N^{-} )
D. ( N_{2} )
11
1390 Why does a molecule of water shows
( 104^{circ} 30^{prime} ) bond angle and ( C H_{4} ) has
( 109^{circ} 28^{prime}, ) although both of them show
( s p^{3} ) hybridization?
11
1391 The hydrides of the first element in
group ( 15-17, ) namely ( N H_{3}, H_{2} O ) and
( H F, ) respectively show abnormally high
values for melting and boiling points. This is due to:
A. small size of ( N, O ) and ( F )
B. the ability to form extensive intermolecular ( H ) bonding
c. the ability to form extensive intramolecular ( H ) bonding
D. effective van der Waal’s interaction
11
1392 The structure of glycine (amino acid) is
( H_{2} N-C H_{2} C O O^{-}(z text { witter ion }) )
Select the correct statement:-
A. Glycine as well as other amino acids are amphoteric
B. The acidic functional group in amino acids is ( N H_{3} )
C. The basic functional group in amino acids is ( -C O O )
D. All are correct
11
1393 All the elements tend to attain eight electrons in their outermost shell either
by sharing or by transfer of electron. The electronic distribution of ( X=2,7 ) and ( Y= )
2, 8, 1. What type of bond is formed between ( X ) and ( Y ? ) How is it formed?
11
1394 Find the sum of bond order and number
of ( pi ) bonds in ( B_{2} ) molecule.
11
1395 What are the postulates of valence bond theory? 11
1396 Maximum number of ( boldsymbol{H}- ) bonds that
can be formed by a water molecule is:
A .2
B. 3
( c cdot 4 )
D. 6
11
1397 In case of sodium chloride, the
chemical bond is formed by:
A. the transfer of valence electrons
B. the sharing of electrons
c. donation of electrons
D. both ( A ) and ( B )
11
1398 The two ways of combining atoms are:
A. transfer of valence electrons
B. sharing of valence electrons
C. both ( A ) and ( B )
D. none of the above
11
1399 Draw the shape of water molecule. 11
1400 Which one of the following statements
is correct?
A. Hybrid orbitals do not form ( sigma ) bonds
B. Lateral overlap of p-orbitals or p- and d- orbitals produces ( pi ) bonds
c. The strength of bonds follows the order
( sigma_{p-p}<sigma_{s-s}<pi_{p-p} )
D. s-orbitals do not form ( sigma ) bonds
11
1401 Which of the following molecules is planar?
A. ( N F_{3} )
в. ( N C l_{3} )
c. ( P H_{3} )
D. ( B F_{3} )
11
1402 Hydrogen bonding plays a central role in
the following phenomena:
This question has multiple correct options
( mathbf{A} cdot ) Ice floats in water
B. Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions.
C. Formic acid is more acidic than acetic acid.
D. Dimerisation of acetic acid in benzene.
11
1403 According to MOT (Molecular Orbital Theory), the molecular orbitals are
formed by mixing of atomic orbitals through LCAO (linear combination of
atomic orbitals). The correct statement
(s) about molecular orbitals is/are
Statement (a): bonding molecular orbitals are formed by addition of wavefunctions of atomic orbitals of same
phase Statement (b) : anti-bonding molecular orbitals do not take part in
bond formation because they belong to inner shells Statement (d) : anti-
bonding molecular orbitals provide stability to molecules while bonding molecular orbitals make the molecules
unstable.
A. statement a, d
B. Statement a, b, c
c. Statement ( a, b, d )
D. Statement a
11
1404 ( boldsymbol{O}=boldsymbol{C}=boldsymbol{O} )
How many pi bonds does given compound have?
( A cdot 2 )
B. 3
( c cdot 4 )
D. 5
11
1405 Predict the structure of the following and indicate whether the bond angles are likely to be dissorted from the
theoretical values:
( B e C l_{2} )
11
1406 Which of the following has a bond
formed by overlap of ( s p^{3}- ) hybrid
orbitals?
A. ( C H_{3}-C equiv C-C H_{3} )
в. ( C H_{3}-C H=C H-C H_{3} )
C ( . C H_{2}=C H-C H=C H_{2} )
D. ( H C equiv C H )
11
1407 The speci/species which do not support octet rule are:
( (a) H_{2} O(b) C l_{2} O(c) N O )
( (d) P C l_{5} )
( A cdot a, b ) and ( c )
B. c and d
( c . b, c ) and ( d )
( D . quad b, d ) and ( a )
11
1408 Assertion
Chemical bonds in organic compounds are covalent in nature.
Reason
Covalent bond is formed by the sharing of electrons in the bonding atoms.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1409 What are covalent compounds? Write
any three features and give two
examples.
11
1410 Given the species ( N_{2}, C O, N O^{+} ) and
( C N^{-} ) which of the following statements
are true for this :
(I) All the species are diamagnetic
(II) All the species are isostructural
(III) All the species have identical bond order
(IV) More than one species have zero dipole moment
A. I, II and III
B. ।, ॥, III and IV
c. III and IV
D. I and II
11
1411 Calculate the ( I-I ) distance in the
given compound ( boldsymbol{H}_{2} boldsymbol{C}=boldsymbol{C} boldsymbol{I}_{2}, ) if ( boldsymbol{C}-boldsymbol{I} )
bond length is 2.10 A. Give answer in nearest integer value in ( boldsymbol{A} )
11
1412 ( C O_{2} ) is not iso-structural with:
A. ( H g C l_{2} )
в. ( operatorname{Sn} C l_{2} )
c. ( C_{2} H_{2} )
D. ( Z n C l_{2} )
11
1413 Identify the linear molecule with lone
pairs?
B. ( mathrm{cO}_{2} )
( c cdot c_{2} H_{2} )
( D cdot X e F_{2} )
11
1414 Although F is more electronegative than
H, the resultant dipole moment of ( boldsymbol{N} boldsymbol{H}_{3} )
is much more than that of ( N F_{3} ). It can
be explained as:
A. the lone pair of nitrogen opposes the dipole moment of ( N F_{3} ) while it is added to the dipole moment of ( N H_{3} )
B. all the dipoles of ( N F_{3} ) are in same direction
c. all the dipoles of ( N H_{3} ) are in opposite direction
D. ( N H_{3} ) has a regular geometry while ( N F_{3} ) has irregular geometry which makes dipole moment of ( N H_{3} ) more than ( N F_{3} )
11
1415 Which of the following are correct for
co-ordianate covalent compounds?
A. Their M.P. is more than purely covalent bond
B. Their B.P. is more than ionic compounds
C. They are soluble in polar solvent
D. They are good conductor of electricity
11
1416 Choose the answer below that
accurately describes the correct
molecular shape for the molecule
( boldsymbol{X} boldsymbol{e} boldsymbol{O} boldsymbol{F}_{4} )
A. Tetrahedral
B. Trigonal pyramidal
c. Trigonal bipyramidal
D. Square pyramidal
11
1417 Which the following interaction form nonbonding molecular orbital when zaxis is the bonding axis?
( mathbf{A} cdot d_{y z}+d_{z^{2}} )
( mathbf{B} cdot d_{y z}+d_{x y} )
C ( cdot d_{x^{2}-y^{2}}+d_{x y} )
D. All form N.B.M.O.
11
1418 Predict the structure of the following and indicate whether the bond angles are likely to be dissorted from the
theoretical values:
( boldsymbol{B} boldsymbol{C l}_{3} )
11
1419 Specify the hybridization of central atom in the following species respectively.
( N_{3}^{-}, N O C l, N_{2} O )
( mathbf{A} cdot s p, s p^{2}, s p )
B. ( s p, s p, s p^{3} )
( mathbf{c} cdot s p^{2}, s p, s p )
D ( cdot s p^{2}, s p^{2}, s p )
11
1420 What are hybridisation states of each carbon atom in the following compounds?
12C=0, CH,CH=CH, (CH CO, CH2=CHCN, CHA:
11
1421 Consider the following species:
(i) ( left[boldsymbol{O}_{2}right]^{2-} )
(ii) ( [boldsymbol{C O}]^{+} )
(iii) ( left[boldsymbol{O}_{2}right]^{+} )
Among these sigma bond alone is
present in?
A. (i) alone
B. (ii) alone
c. (iii) alone
D. (i) and (ii)
E. (i), (ii) and (iii)
11
1422 Weakest interactions are involved in:
A. dative bond
B. metallic bond
c. hydrogen bond
D. vander waals forces
11
1423 Arrange the following bonds according
to their average bond energies in
descending order:
( boldsymbol{C}-boldsymbol{C l}, boldsymbol{C}-boldsymbol{B r}, boldsymbol{C}-boldsymbol{F}, boldsymbol{C}-boldsymbol{I} )
A. ( C-B r>C-I>C-C l>C-F )
B. ( C-F>C-C l>C-B r>C-I )
c. ( C-I>C-B r>C-C l>C-F )
D. ( C-C l>C-B r>C-I>C-F )
( F )
11
1424 If we consider no mixing of ‘2s’ and ‘2p’ orbitals, then the bond order and
magnetic nature of the diatomic
molecule ( mathrm{C}_{2} ) would be:
B. 2.5 and diamagnetic
c. 2 and diamagnetic
D. 2 and paramagnetic
11
1425 Identify the favourable conditions for the formation of ionic bond.
A. Low IP value of metal, low EA value of non-metal.
B. High IP value of metal, high EA value of non-metal.
c. Low IP value of metal, high EA value of non-metal
D. HighIP value of metal, low IP value of non-metal.
11
1426 Which option is correct?
[
mathrm{HC} equiv^{2}-mathrm{CH}_{2}-mathrm{CH}=mathrm{CH}_{2}
]
( A )
[
stackrel{1}{mathrm{C}} Rightarrow text { sp hybridised }
]
в.
[
stackrel{5}{mathrm{C}} Rightarrow mathrm{sp}^{2} text { hybridised }
]
( c )
( stackrel{3}{mathrm{C}} Rightarrow ) sp ( ^{3} ) hybridised
D. A
11
1427 the bond order in Column II.
Q.54 Match the species in Column I with the bond order in
Column 1 Column II
A. NO
1. 1.5
в со
2. 20
3. 2.5
D. O 4. 3.0
ou non
11
1428 According to M.O. theory for the atomic
species ” ( C_{2} ) ” which is not correct? This question has multiple correct options
A. Bond order is zero and it is paramagnetic
B. Bond order is zero and it is diamagnetic.
C. Bond order is two and it is paramagnetic
D. Bond order is two and it is diamagnetic.
11
1429 Three elements ( A, B, C ) belong to
( boldsymbol{I I} boldsymbol{A}, boldsymbol{I} boldsymbol{V} boldsymbol{A}, boldsymbol{V} boldsymbol{I} boldsymbol{A} ) group respectively of
the periodic table. Identify the elements that form covalent bonds and that form electrovalent bond respectively?
( mathbf{A} cdot A ) and ( B )
B. ( B ) and ( C )
c. ( C ) and ( B )
D. None of the above
11
1430 If true enter 1 , else enter 0 .
The formation of ionic solid from ions of
the elements is an endothermic
process.
A.
11
1431 Q. 4 Hydrogen bonds are formed in many compounds e.g., H20, HF, NH3. The
boiling point of such compounds depends to a extent on the strength of
hydrogen bond and the number of hydrogen bonds. The correct decreasing
order of the boiling points above compounds is
(a) HF > HAO>NH,
(b) H,O > HF > NH3
(c) NHz > HF> H2O
(d) NHA > HNOPHE
11
1432 State True or False.
( pi ) bond is formed by the colateral overlapping of atomic orbitals.
A. True
B. False
11
1433 The correct order of magnitude of bond
angles among the compounds ( boldsymbol{C H}_{4} )
( N H_{3} ) and ( H_{2} O ) is:
A. ( C H_{4}>H_{2} O<N H_{3} )
B. ( H_{2} O<N H_{3}<C H_{4} )
c. ( N H_{3}<C H_{4}<H_{2} O )
D. ( N H_{3}<H_{2} O<C H_{4} )
11
1434 Can a non polar molecule have polar
covalent bonds?
11
1435 Molecule which contains only sigma bonds in it is:
A. Pentene
B. Pentane
c. Pentadiene
D. Pentyne
11
1436 The types of bonds present in
( mathrm{CuSO}_{4} .5 mathrm{H}_{2} mathrm{O} ) are only:
A. electrovalent and covalent
B. electrovalent and coordinate covalent
C. electrovalent, covalent and coordinate covalent
D. covalent and coordinate covalent
11
1437 Which of the following is responsible for the relatively low vapour pressure of water?
A. Metallic bonding
B. lonic bonding
c. Hydrogen bonding
D. Polar covalent bonding
E. Nonpolar covalent bonding
11
1438 Which of the following molecules have zero dipole moment and tetrahedral
structure ?
This question has multiple correct options
A ( cdot C C l_{4} )
в. ( operatorname{SnCl}_{2} )
( mathrm{c} cdot operatorname{Sn} C l_{4} )
D. ( C O_{2} )
11
1439 How many peroxy linkages are present
in ( C r O_{5} ? )
( mathbf{A} cdot mathbf{1} )
B. 2
( c .3 )
D. 4
E . 5
11
1440 What is wrong with the Lewis dot
structure for ( I O^{-} ? )
[
[because dot{I}: dot{O}:]^{-}
]
A. The bond between ( I ) and ( O ) should be represented with single line
B. The negative symbol should be on the inside of the brackets
c. oxygen is not satisfied according to the octet rule
D. There are not enough electrons
11
1441 The theory that can completely/properly explain the nature of bonding in
( left[N i(C O)_{4}right] ) is :
A. Valence bond theory
B. Crystal field theory
c. Molecular orbital theory
D. Werner’s theory
11
1442 All covalent compounds possess coordinate covalent bonds.
A. True
B. False
11
1443 Consider the following Lewis
Dot structure:
( [: ddot{O}=N=ddot{O}:]^{+} )
The sum of formal charges on ( N ) and ( O )
is:
11
1444 The formal charge on carbon atom in
carbonate ion is?
11
1445 Choose the answer below that
accurately describes the correct molecular shape for the molecule
( boldsymbol{X} boldsymbol{e} boldsymbol{O} boldsymbol{F}_{4} )
A. Tetrahedrral
B. Trigonal pyramidal
c. Trigonal bipyramidal
D. Square pyramidal
E. Flat
11
1446 Statement I : Ammonia has a trigonal pyramidal molecular geometry. Statement II : Ammonia has a
tetrahedral electron pair geometry with the three atoms bonded to the central
atom
A. true, true, correct explanation
B. true, true, not correct explanation
c. true, false
( mathbf{D} cdot ) false, true
11
1447 The bond order of ( C O ) molecule on the
basis of molecular orbital theory is:
A. zero
B . 2
( c .3 )
D.
11
1448 The lattice energy of ( N a C l ) is ( 788 mathrm{kJ} )
mol ( ^{-1} ). This means that 788 kJ of
energy is required:
A. to separate one mole of solid ( N a C l ) into one mole of ( N a_{(g)} ) and one mole of ( C l_{(g)} ) to infinite distance
B. to separate one mole of solid ( N a C l ) into one mole of ( N a_{(g)}^{+} ) and one mole of ( C l^{-}(g) ) to infinite distance
c. to convert one mole of solid ( N a C l ) into one mole of gaseous ( N a C l )
D. to convert one mole of gaseous ( N a C l ) into one mole of solid ( N a C l )
11
1449 In which of the following pair(s), is/are the stronger bond found in the first
species? This question has multiple correct options
A. ( O_{2}^{-}, O_{2} )
в. ( N_{2}, O_{2}^{+} )
c. ( N O^{+}, N O )
D. ( O_{2}^{-}, O_{2}^{2+} )
11
1450 Q4. Draw the Lewis structures for the following molecules and ions:
H,S, SiCl, BeF, CO2, HCOOH
11
1451 Chlorine does not show hydrogen bonding in its compounds while nitrogen shows hydrogen bonding in its compounds. Identify the correct reason
A. Chlorine is not as highly electronegative as nitrogen
B. Chlorine has vacant d-orbitals while nitrogen has no vacant’d’ sub shell
c. ( H-C l ) bond is stronger than ( N-H ) bond
D. chlorine has larger size than nitrogen
11
1452 Decreasing order of stability of ( boldsymbol{O}_{2}, boldsymbol{O}_{2}^{-} )
( O_{2}^{+}, ) and ( O_{2}^{2-} ) is:
A ( cdot O_{2}>O_{2}^{+}>O_{2}^{2-}>O_{2}^{-} )
B. ( O_{2}^{-}>O_{2}^{2-}>O_{2}^{+}>O_{2} )
( mathrm{c} cdot O_{2}^{+}>O_{2}>O_{2}^{-}>O_{2}^{2} )
D. ( O_{2}^{2-}>O_{2}^{-}>O_{2}>O_{2}^{+} )
11
1453 How many atoms of ( B F_{3} ) lie in the same
plane?
11
1454 Formation of ( N a C l ) is best shown by:
A. born-haber cycle
B. wilkinson’s synthesis
c. haber process
D. none of these
11
1455 Among ( N H_{3}, H_{2} O ) and ( H F, ) which
would you expect to have highest magnitude of hydrogen bonding and why?
11
1456 Which of the following pairs of compounds will not form H-bonds with
each other?
A. Ethanol-methanol
B. Ethanol-water
c. chloroform-acetone
D. carbon tetrachloride-acetone
11
1457 Q4. Give the shapes of the following molecules:
(i) AB, (ii) AB
CAB
11
1458 Consider the following statements and arrange in the order of true/false as
given in the codes:
( S_{1}: ln A B_{2} L_{2} ) type, the ( B A B ) bond angle will always be greater than normal tetrahedral ( (L ) is a lone pair)
( S_{2}: ) Maleic acid has higher ( K_{a_{1}} ) value than fumaric acid due to
intramolecular hydrogen bonding.
( S_{3}: ln C l O_{3}^{-}, N H_{3} ) and ( X e O_{3}, ) the
hybridisation and the number of lone pair(s) on central atoms are same.
( mathbf{A} cdot T T T )
в. ( F T F )
c. ( F T T )
D. ( F F T )
11
1459 In ammonia molecule
covalent bond formation takes place between nitrogen and hydrogen.
11
1460 Shape of ( C O_{2} ) is:
A. pyramidal
B. triangular
c. linear
D. spherical
11
1461 What is the bond angle between ( C l- )
( boldsymbol{O}-boldsymbol{C l} ) in ( boldsymbol{C l}_{2} boldsymbol{O}_{7} ? )
A ( cdot 109^{circ} )
B. ( 119^{circ} )
( mathbf{c} cdot 108^{circ} 25^{prime} )
D. ( 120^{circ} )
11
1462 Are covalent bonds always non polar?
A. True
B. False
11
1463 Which one of the following compounds has the electron-pair geometry as di trigonal bipyramidal with three equatorial positions occupied by lone pairs of electrons?
( mathbf{A} cdotleft[A l C l_{3}right] )
в. ( X e F_{2} )
( mathbf{c} cdotleft[P tleft(N H_{3}right)_{2} C l_{2}right] )
D. ( C H_{3}-M g-B r )
11
1464 How many ( p- ) orbitals are parallel to
each other in the following conjugated system?
11
1465 In a polar covalent molecule, the shared
electrons are shifted towards the more
electronegative element.
A. True
B. False
11
1466 In the Lewis dot structure ( X ) : the
predictable oxidation number is :
A ( .+1 )
в. – –
( c cdot+2 )
D. -2
( mathrm{E} cdot+3 )
11
1467 The ( C-O-C ) bond angle in dimethyl
ether is:
A ( .111 .7^{circ} )
B . ( 108.5^{circ} )
( c cdot 109^{circ} )
D. ( 120^{circ} )
11
1468 Which of the following does not contain
covalent bond?
A. ( C o C l_{2} )
в. ( M n O_{4}^{-} )
( mathrm{c} cdot mathrm{Cr} mathrm{O}_{4}^{2} )
D. ( C r_{2} O_{7}^{2-} )
11
1469 During the formation of sodium chloride, chlorine accepts one electron from sodium to attain the configuration of which noble gas?
A. Neon
B. Helium
c. Argon
D. xenon
11
1470 Which of the following compounds shows maximum hydrogen bonding?
( mathbf{A} cdot H F )
в. ( H_{2} O )
c. ( N H_{3} )
D. ( C H_{3} O H )
11
1471 Specify the co-ordination geometry
around and hybridization of ( N ) and ( B )
( operatorname{atom} operatorname{in} mathbf{a} 1: 1 ) complex of ( B F_{3} ) and
( boldsymbol{N} boldsymbol{H}_{3}: )
( mathbf{A} cdot N: ) tetrahedral, ( s p^{3} ; B: ) tetrahedral, ( s p^{3} )
B. ( N: ) pyramidal, ( s p^{3} ; B ) : pyramidal, ( s p^{3} )
C ( . N: ) pyramidal, ( s p^{3} ; B: ) planar, ( s p^{3} )
D. ( N: ) pyramidal, ( s p^{3} ; B: ) tetrahedral, ( s p^{3} )
11
1472 Molecule with double bond is :
A ( . H_{2} )
B. ( F_{2} )
( c cdot C l_{2} )
D. ( O_{2} )
11
1473 The partial charge separation between
the bonded atoms gives rise to
in that compound.
A. covalent character
B. coordinate character
c. ionic character
D. none of these
11
1474 8. Among the following ions, the p, and d overlap will be
present in
(a) NOZ
(b) Soz-
(c) CO-
(d) NOE
11
1475 The shape of methane molecule is:
A . pentahedral
B. hexahedral
c. octahedral
D. tetrahedral
11
1476 Which one of the following molecule is planar?
A. ( N F_{3} )
в. ( N C l_{3} )
c. ( P H_{3} )
D. ( B F_{3} )
11
1477 In which of the following sets, the central atom of each member involves
( boldsymbol{s} boldsymbol{p}^{3} ) hybridisation?
( mathbf{A} cdot I O_{4}^{-}, I C l_{4}^{-}, I F_{4}^{+} )
в. ( X e O_{3}, X e O_{4}, X e F_{4} )
( mathrm{c} cdot mathrm{SO}_{3}, mathrm{SO}_{3}^{2-}, mathrm{SO}_{4}^{2} )
D. ( P C l_{4}^{+}, B F_{4}^{-}, C l O_{4} )
11
1478 According to Dalton, atoms combine in ratio to form compounds. 11
1479 Electrovalent bond or ionic bond is
formed by:-
A. Sharing of electrons
B. Donation of electrons
c. Transfer of electrons
D. None of these
11
1480 Which of the following have identical bond order?
(I) ( boldsymbol{C} boldsymbol{N}^{-} )
(II) ( boldsymbol{O}_{mathbf{2}}^{-} )
( (||) N O^{+} )
( (mid V) C N^{+} )
A . ।, ॥
B. ॥, IV
c. ।, ॥।, ॥।
D. I, IV
11
1481 What type of bond does ( M g ) form with
( C l ? )
A. Covalent
B. Ionic
c. co-ordinate
D. None of these
11
1482 The electronic arrangements of four elements i, ii, iii, iv are:
(iii) ( 1 s^{2} 2 s^{2} 2 p^{5} ) (iv)
(i) ( 1 s^{2} ) (ii) ( 1 s^{2} 2 s^{2} 2 p^{2} ) ( 1 s^{2} 2 s^{2} 2 p^{6} )
The tendency to form ionic bond is maximum in:
( A )
B. i i
c. iii
( D . ) iv
11
1483 Q.7 Which of the following species has tetrahedral geometry?
(a) BHA
(b) NHÀ (c) CO-
(d) H2O
11
1484 [
C H_{3} O-C H=C H-N O_{2}
]
ne
( C H_{2}=C H-N O_{2} ) ( C H_{2}=C H-C l )
[
C H_{2}=C H_{2}
]
Which of the following is the correct order of ( C=C ) bond lengths among
these compounds?
A ( I>I I>I I I>I V )
( V )
в. ( I V>I I I>I I>I )
c. ( I>I I I>I I>I V )
D. ( I I>I I I>I>I V )
11
1485 Which of the following is not a
correct statement about an ionic
compound?
A. Higher the temperature, more is the solubility
B. Higher the dielectric constant of the solvent, more is the solubility
C. Higher the dipole moment of the solvent,more is the solubility
D. Higher the lattice energy, more is the solubility
11
1486 Which of the following is miscible with
water?
A. ( C S_{2} )
В . ( C_{2} H_{5} O H )
c. ( C C l_{4} )
D. ( C H C l_{3} )
11
1487 Draw electron dot structure of
( boldsymbol{C O}_{2}, boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{F}_{2}, boldsymbol{N}_{2} )
11
1488 ( K_{2} S O_{4} cdot A l_{2}left(S O_{4}right)_{3} cdot 24 H_{2} O ) and
( left(N H_{4}right)_{2} S O_{4} cdot A l_{2}left(S O_{4}right)_{3} cdot 24 H_{2} O ) are:
A. isotopes
B. allotropes
c. isomorphous
D. isomers
11
1489 When two ice cubes are pressed over
each other they unites to form one cube. Which of the following forces are responsible to hold them together?
A. lonic interaction
B. Van der Waal’s forces
c. covalent interaction
D. Hydrogen bond formation
11
1490 Q20. Name the two conditions which must be satisfied for hydrogen bonding to take place in a
molecule.
1
11
1491 Q. 37 In both water and dimethyl ether (CH-0-CH3), oxygen atom is
central atom, and has the same hybridisation, vet they have different
bond angles. Which one has greater bond angle? Give reason.
thomolecules
11
1492 Among the following species, the ( boldsymbol{H}- ) ( boldsymbol{X}-boldsymbol{H} ) angle ( (boldsymbol{X}=boldsymbol{B}, boldsymbol{N} text { or } boldsymbol{P}) ) follows
the order:
A ( cdot P H_{3}<N H_{3}<N H_{4}^{+}<B F_{3} )
B. ( N H_{3}<P H_{3}<N H_{4}^{+}<B F_{3} )
C. ( B F_{3}<P H_{3}<N H_{4}^{+}<B F_{3} )
D. ( B F_{3}<N H_{4}^{+}<N H_{4}^{+}<B F_{3} )
11
1493 Presence of 3 bond pairs corresponds to hybridisation.
( A cdot s p^{3} )
B ( cdot s p^{3} d )
( c cdot s p^{2} )
D. sp
11
1494 Assertion
Statement-1: In water, orthoboric acid
behaves as a weak monobasic Lewis
acid.
Reason
Statement-2: In water, orthoboric acid
acts as a proton donor.
A. Statement-1 is True, Statement-2 is True; Statementis a correct explanation for Statement-
B. Statement-1 is True, Statement-2 is True; Statementis NOT a correct explanation for Statement-
c. Statement-1 is True, Statement-2 is False
D. Statement- 1 is False, Statement-2 is True
11
1495 Q Type your question
4
( B )
( c )
( D )
11
1496 Anhydrous ( A l C l_{3} ) is a covalent
compound. From the data given below,
predict whether it would remain covalent or become ionic in an aqueous
solution.
(lonisation energy of ( boldsymbol{A} boldsymbol{L}= ) ( mathbf{5 1 3 7} boldsymbol{K J} quad boldsymbol{m o l}^{-1} mathbf{)} )
( Delta boldsymbol{H} ) hydration for ( boldsymbol{A} boldsymbol{l}^{3+}= )
( -4665 K J m o l^{-1} )
( Delta H ) hydration for ( C l^{-}= )
( -381 K J m o l^{-1} )
A. lonic
B. Covalent
c. Partially ionic
D. Partially covalent
11
1497 ( mathrm{H}_{2} mathrm{O} ) is a liquid where as ( mathrm{H}_{2} mathrm{S} ) is a gas.
This is due to
A. the molecular mass of ( mathrm{H}_{2} mathrm{S} ) is more than that of ( mathrm{H}_{2} mathrm{O} )
B. the molecular mass of ( mathrm{H}_{2} mathrm{S} ) is less than that of ( mathrm{H}_{2} mathrm{O} )
C . Presence of hydrogen bond in ( mathrm{H}_{2} mathrm{S} )
D. absence of hydrogen bond in ( mathrm{H}_{2} mathrm{S} )
11
1498 This holds a sample of barium iodide,
( B a I_{2}, ) together:
A. hydrogen bonding
B. ionic bonding
c. metallic bonding
D. nonpolar covalent bonding
E. polar covalent bonding
11
1499 In which of the following pairs, first compound has larger bond angle than
another?
This question has multiple correct options
A. ( H_{2} O ) and ( N H_{3} )
B. ( S F_{2} ) and ( B e F_{2} )
( mathrm{c} . B F_{3} ) and ( B F_{4}^{-} )
D. ( N H_{3} ) and ( N F_{3} )
11
1500 Maximum bond angle is present in:
( mathbf{A} cdot B B r_{3} )
в. ( B C l_{3} )
( c . B F_{3} )
D. none of these
11
1501 ( P ) in ( P C l_{5} ) has ( s p^{3} d ) hybridisation which of the following statement is wrong
about ( boldsymbol{P C l}_{5} ) structure?
A. Two ( P-C l ) bonds are stronger and three ( P-C l ) bonds are weaker
B. Two ( P-C l ) bonds are axial and larger than three ( P ) Cl equatorial bonds
C . ( P C l_{5} ) has trigonal bipyramidal geometry with nonpolar nature
D. All of these
11
1502 Formation of ( C a O ) by Born-Haber cycle
involves which of the following
processes?
A. Sublimation of ( C a )
B. Ionization of ( C a ) to ( C a^{+2} )
C. Homolytic Bond dissociation of ( O_{2} )
D. Electron Affinity of ( O ) to ( O^{2-} )
E. All of these
11
1503 Which of the following has strongest hydrogen bonding?
A. ( O-H ldots N )
B. ( O-H ldots O )
c. ( F-H ldots F )
D. ( O-H ldots F )
11
1504 0.61 Use the molecular orbital energy level diagram to show that N, would be
expected to have a triple bond. F2, a single bond and Ne, no bond.
11
1505 ( H C l ) gas is covalent and ( N a C l ) is an
ionic compound. This is because:
A. sodium is highly electropositive
B. hydrogen is a non-metal
c. ( H C l ) is a gas
D. electronegativity difference between ( H ) and ( C l ) is less than ( 2 . )
11
1506 Which of the following pair of species is not isostructural?
A. ( K r F_{2}, I C l_{2} )
в. ( S O_{3}, S O_{3}^{2} )
c. ( C O_{3}^{2-}, B O_{3}^{3} )
D. ( operatorname{si} O_{4}^{4-}, I O_{4} )
11
1507 Molecule ( A B ) has a bond length of 1.617 A and a dipole moment of 0.38 D. The fractional charge on each atom (absolute magnitude) is :
( left(e_{0}=4.802 times 10^{-10} mathrm{esu}right) )
( mathbf{A} cdot mathbf{0} )
B. 0.05
c. 0.5
D. 1.0
11
1508 Which one of the following is most polar?
A. ( C l-C l )
B. ( N-F )
c. ( C-F )
D. ( O-F )
11
1509 FEST
Q35. Use molecular orbital theory to explain why the Be, molecule does not exist.
11
1510 Calculate the sum of ratios of ( sigma )
bonding electrons and ( pi ) bonding
electrons in ( C_{2} ) molecule
11
1511 Identify the correct reason for zero
dipole moment.
This question has multiple correct options
A. The molecule may be homoatomic
B. There may be a dative bond in the molecule
C. The molecule may be heteroatomic and symmetric
D. There may be lone pairs in the molecule
11
1512 09. How do you express the bond strength in terms of bond order? 11
1513 Amongst ( L i C l, R b C l, B e C l_{2} ) and
( M g C l_{2}, ) the compounds with the
greatest and the least ionic character
respectively are:
( mathbf{A} cdot L i C l ) and ( R b C l )
в. ( R b C l ) and ( B e C l_{2} )
c. ( M g C l_{2} ) and ( B e C l_{2} )
D. ( R b C l ) and ( M g C l_{2} )
11
1514 From the following sequence calculate the lattice energy of ( A B(s) ) ( boldsymbol{A}(boldsymbol{s}) rightarrow boldsymbol{A}(boldsymbol{g})+boldsymbol{e} ; quad boldsymbol{6} 1 boldsymbol{0} boldsymbol{k} boldsymbol{J} boldsymbol{m o l}^{-1} )
( boldsymbol{B}(boldsymbol{g})+boldsymbol{e} rightarrow boldsymbol{B}(boldsymbol{g}) ; quad-boldsymbol{2 6 0} boldsymbol{k} boldsymbol{J} boldsymbol{m o l}^{-1} )
( boldsymbol{A}(s)+boldsymbol{B}(boldsymbol{g}) rightarrow boldsymbol{A} boldsymbol{B}(s) )
( -569 k J m o l^{-1} )
( mathbf{A} cdot-219 )
в. -919
( mathbf{c} cdot+1539 )
D. +301
11
1515 Which have correct order of dipole
moment?
A. ( S O_{2}>H_{2} O )
В. ( N F_{3}>N H_{3} )
c. ( B F_{3}<N H_{3} )
D. ( S O_{2}<S O_{3} )
11
1516 Which of the following elements can not
exhibit ( s p^{3} d ) hybridisation state:
A .
B.
( c cdot c )
D. B
11
1517 State True or False.
( B C l_{3} ) in aqueous solution exists as
( B^{3+} ) and ( C l )
A . True
B. False
11
1518 Which of the following statements
is/are true?
This question has multiple correct options
A. It is impossible to satisfy the octet rule for all atoms in ( X e F_{2} )
B. ( M g S O_{4} ) is soluble in water because hydration energy of ( M g S O_{4} ) is higher in comparison to its lattice energy.
C. The bond in ( N O^{+} ) should be stronger than the bond in
( N O^{-} )
D. For ozone molecule, one oxygen-oxygen bond is stronger than the other oxygen-oxygen bond.
11
1519 ( H_{2} O ) molecule is linear.
If the statement is true enter 1 , else
enter 0
11
1520 Q2. Write the type of hybridisation involved in CH, C,H, and C H2. 11
1521 Based on the following diagram, which colored bond(s) and corresponding number would exhibit the weakest
attractive forces for the structure?
A. Green (#3)
B. Red (#2)
c. Green (#3) and blue (#1)
D. Yellow (#4)
11
1522 Write hybridization and geometry of
( a) dot{C} l O_{3} )
b) ( dot{C} F_{3} )
11
1523 The hybridisation of ( C ) atoms in ( (C- )
( boldsymbol{C}) operatorname{single} ) -bond of ( boldsymbol{H}-boldsymbol{C} equiv boldsymbol{C}- )
( boldsymbol{C H} equiv boldsymbol{C H}_{2} ) is
( mathbf{A} cdot s p^{3}-s p^{3} )
B ( cdot s p^{2}-s p^{3} )
c. ( s p-s p^{2} )
D. ( s p^{3}-s p )
11
1524 Which of the following statements is
true for ( boldsymbol{I} boldsymbol{O}_{2} boldsymbol{F}_{2}^{-} ? )
A. The electrons are located at the corners of a trigonal bipyramidal but one of the equatorial pairs is unshared
B. It has ( s p^{3} d ) hybridisation and is ( T ) – shaped
C . Its structure is analogous to ( S F_{4} )
D. (A) and
(C) both
11
1525 The number of ( pi ) and ( sigma ) bond in the
following structure respectively are:
( A cdot 8,5 )
B. 8,6
c. 3,8
D. 5,13
11
1526 Predict the order of thermal stability of the group 1 and 2 metal carbonates. 11
1527 Ethanol has a higher boiling point than dimethyl ether though they have the same molecular weight. This is due to:
A. resonance
B. coordinate bonding
c. Hydrogen Bonding
D. ionic bonding
11
1528 The strength of sigma bonds formed by axial overlap of ( s ) – orp-orbitals of 2 nd
shell of participating atoms decreases
as:
11
1529 Q27. Draw diagrams showing the formation of a double bond and a triple bond between carbon
atoms in C, H, and C, H, molecules.
Ans
11
1530 In which of the following molecules/ion, all the bonds are not equal?
A. ( X e F_{4} )
в. ( B F_{4}^{-} )
c. ( S F_{4} )
D. ( operatorname{siF}_{4} )
11
1531 State the type of Bonding in the following molecules:
Water.
11
1532 The negative and positive ions are held by of attraction.
A. negative force
B. positive force
c. electrostatic force
D. none of the above
11
1533 In which of the following, there is intermolecular hydrogen bonding? This question has multiple correct options
A . water
в. ( C_{2} H_{5} O H )
c. ( C H_{3} ) СООН
D. ( H-F )
11
1534 If the atomic number of an element is
( 33, ) it will be placed in the periodic table in the
A. First group
B. Second group
C. Fifth group
D. Fourth group
11
1535 Which of the following compounds is covalent?
A ( . H_{2} )
в. ( C a O )
c. ( K C l )
D. ( N a_{a} S )
11
1536 Oxygen molecule is paramagnetic
because:
A. no. of bonding electrons ( > ) no. of antibonding electrons
B. no. of bonding electrons ( < ) no. of antibonding electrons
C. no. of bonding electrons = no. of antibonding electrons
D. presence of unpaired electrons in molecular orbitals.
11
1537 What is a hydrogen bond?
A. An attraction between a slightly positive hydrogen on one molecule and a slightly negative atom on another molecule.
B. An attraction between a slightly negative hydrogen on one molecule and a slightly positive atom on another molecule.
C. A very weak force within an atom.
D. A weak attraction between the carbon and hydrogen within a molecule.
E. An attraction between a slightly negative hydrogen on one molecule and a slightly positive atom on the same molecule.
11
1538 The correct order of strength of H-bond
in the following compound:
( mathbf{A} cdot H_{2} O>H_{2} O_{2}>H F>H_{2} S )
B ( cdot H F>H_{2} O_{2}>H_{2} O>H_{2} S )
( mathbf{c} cdot H F>H_{2} O>H_{2} S>H_{2} O_{2} )
( mathbf{D} cdot H F>H_{2} O>H_{2} O_{2}>H_{2} S )
11
1539 In vinyl acetylene ( boldsymbol{C H} equiv boldsymbol{C}-boldsymbol{C H}= )
( C H_{2} ) type of overlapping in ( left(C_{2} sigma C_{3}right) )
bond is :
( mathbf{A} cdot s p^{2}-s p )
B. ( s p-s p^{2} )
( mathbf{c} cdot s p^{3}-s p^{3} )
D. ( s p^{3}-s p^{2} )
11
1540 Density of ice is less than that of water because of:
A. absence of hydrogen bonding
B. crystal modification of ice
c. open porous structure of ice due to hydrogen bonding
D. different physical states of these
11
1541 The pair of molecules forming strongest hydrogen bonds are:
A. ( operatorname{SiH}_{4} ) and ( operatorname{SiF}_{4} )
в. ( C H_{3} C O C H_{3} ) and ( C H C l_{3} )
c. ( C H_{3} C O O H ) and ( H C O O H )
D. ( H_{2} O ) and ( H_{2} )
11
1542 Which has highest bond energy and stronger bond?
( mathbf{A} cdot F_{2} )
B. ( C l_{2} )
c. ( B r_{2} )
D. ( I_{2} )
11
1543 ( 2 p_{x} ) atomic orbital undergoes linear combination with:
A ( cdot 2 p_{y} ) orbital
B . ( 2 p_{x} ) orbital
C. Both ( 2 p_{y} ) and ( 2 p_{x} ) orbitals
D ( cdot 2 p_{z} ) orbital
11
1544 Assuming Z-axis as molecular axis, the molecular orbitals formed by the following combination of atomic orbitals is labeled as:
( 2 s+2 s: p i 2 s )
( A )
11
1545 How many atom(s) of ( B e C l_{2} ) lie in the
same plane?
11
1546 The molecular orbital configuration of
( C N^{+} ) is :
( mathbf{A} cdot K K sigma(2 s)^{2}, sigma^{*}(2 s)^{2}, pileft(2 p_{x}right)^{2}, pileft(2 p_{y}right)^{2} )
B . ( K K sigma(2 s)^{2}, sigma^{*}(2 s)^{2}, sigmaleft(2 p_{z}right)^{2}, pileft(2 p_{x}right)^{1}, pileft(2 p_{y}right)^{1} )
C ( cdot K K sigma(2 s)^{2}, sigma^{*}(2 s)^{2}, sigmaleft(2 p_{z}right)^{2}, pileft(2 p_{x}right)^{2}, pileft(2 p_{y}right)^{1} )
D. ( K K sigma(2 s)^{2} sigma^{*}(2 s)^{2}, sigmaleft(2 p_{z}right)^{2} pileft(2 p_{x}right)^{2}, pileft(2 p_{y}right)^{2} )
11
1547 ( O_{2} ) is paramagnetic in nature because it has two unpaired electrons. if true enter 1 , else enter 0
( A )
11
1548 Which type of overlapping is shown by ( boldsymbol{p} )
( left(p_{x}, p_{y} text { and } p_{z}right) ) -orbitals?
A. Two end to end and one sidewise overlap
B. Two sidewise and one end to end overlap
c. Three sidewise overlaps
D. Three end to end overlaps
11
1549 ( H_{2} O ) boils at higher temperature than
( H_{2} S, ) because it is capable of forming:
A. ionic bonds
B. covalent bonds
c. hydrogen bonds
D. metallic bonds
11
1550 Intramolecular hydrogen bonding is
found in:
A. salicylaldehyde
B. water
c. acetaldehyde
D. phenol
11
1551 Which of the following has higher
lattice energy ( -A l_{2} O_{3} ) or ( A l_{2} S e_{3} ? )
A. ( A l_{2} O_{3}>A l_{2} S e_{3} )
B . ( A l_{2} O_{3}<A l_{2} S e_{3} )
c. ( A l_{2} O_{3}=A l_{2} S e_{3} )
D. None of these
11
1552 In the compound
[
boldsymbol{C H}_{3}
]
the
[
boldsymbol{H C} equiv boldsymbol{C}-boldsymbol{C}=boldsymbol{C H}_{2}
]
hybridisation of ( C-2 ) and ( C-3 )
carbons are respectively:
A ( cdot s p^{3} ) and ( s p^{3} )
B. ( s p^{2} ) and ( s p^{3} )
( mathbf{c} cdot s p^{2} ) and ( s p )
D. ( s p^{3} ) and ( s p )
11
1553 The type of hybrid orbitals used by
chlorine atom in ( C l O_{2}- ) is:
( A cdot s p^{3} )
B . ( s p^{2} )
( c cdot s p )
D. ( d s p^{2} )
11
1554 Find the oxidation number of Oxygen in ( boldsymbol{C a O} )
( A cdot+1 )
( B cdot+2 )
( c cdot-1 )
( D cdot-2 )
11
1555 Strongest hydrogen bond is present in
A. ( H C l )
в. ( H B r )
c. ( H F )
D. ( H I )
11
1556 Which of the following statements are
correct for the ( boldsymbol{S O}_{boldsymbol{4}}^{boldsymbol{2}-} ) ion?
This question has multiple correct options
A. It is tetrahedral.
B. All the ( S-O ) bond length are equal, and shorter than
expected.
C. It contains four ( sigma ) -bonds between the ( S ) and the ( O ) atoms, two ( pi ) -bonds delocalized over the ( S ) and the four ( O ) atoms, and all the ( S-O ) bonds have a bond
order of 1.5
D. Oxidation state of sulphur is +6 and all oxygen in 2
11
1557 Identify the favourable conditions for the formation of ionic bond.
A. Low IP value of metal, low EA value of nonmetal
B. High IP value of metal, high EA value of nonmetal
c. Low IP value of metal, high EA value of nonmetal
D. High IP value of metal, low EA value of nonmetal
11
1558 Superoxide ion has electrons in anti-bonding molecular
orbitals.
11
1559 The hybridization of atomic orbitals
of nitrogen in ( N O_{2}^{+}, N O_{2}^{-} ) and ( N H_{4}^{+} ) is:
A ( cdot s p^{2}, s p^{3} ) and ( s p^{2} ) respectively
B. ( s p, s p^{2} ) and ( s p^{3} ) respectively
C. ( s p^{2}, s p ) and ( s p^{3} ) respectively
D. ( s p^{2}, s p^{3} ) and ( s p ) respectively
11
1560 What do you mean by noble metals? 11
1561 The bond energies in ( mathrm{NO}, N O^{+} ) and
( N O^{-} ) follow the order:
A ( cdot N O^{+}>N O>N O^{-} )
В. ( N O>N O^{+}>N O^{-} )
c. ( N O^{-}>N O>N O^{+} )
D. ( N O^{+}>N O^{+}>N O )
11
1562 Q17. How is bond order related to bond length of a molecule? 11
1563 LLLLLILEO
Q2. (a) Define dipole moment. What are the units of dipole moment?
(b) Dipole moment values help in predicting the shapes of covalent molecules. Explai
Ansal Dinole moment. In
olor molecule ann and have a nemitin nhnront
11
1564 The major binding force in diamond, silicon and quartz is :
A. electrostatic force
B. covalent bond
c. non-covalent bond
D. van der Waals force
11
1565 Find the total white colour compounds from following
( mathbf{A g C l}, mathbf{A g F} )
( F e S O_{4} .7 H_{2} O, Z n S O_{4} .7 H_{2} O )
Anhydrous ( C u S O_{4}, F e C l_{3}, F e C l_{2} )
11
1566 Two different compounds have the
formula ( X e F_{2} C l_{2} . ) Write Lewis
structure for these two compounds, and describe how measurement of dipole might be used to distinguish between them.
11
1567 Which of the following is the correct representation of electron dot structure of nitrogen?
A ( ldots ddot{N}: ddot{N} )
B . : ( dot{N}:: dot{N} )
( mathrm{c} cdot ddot{N}: dot{N} )
D・: ( N: )
11
1568 The shape of sulphate ion is:
A . Hexagonal
B. Square planar
c. Trigonal bipyramidal
D. Tetrahedral
11
1569 Which substance present in cotton
Cloth forms hydrogen bond with water?
A. Nucleic acid
B. Cellulose
c. Phenol
D. RNA
11
1570 Find the number of nonbonding molecular orbital(s) from the following (lf ( x ) is inter nuclear axis):
( boldsymbol{s}+boldsymbol{p}_{boldsymbol{y}}, boldsymbol{p}_{boldsymbol{y}}+boldsymbol{p}_{boldsymbol{y}}, boldsymbol{p}_{boldsymbol{x}}+boldsymbol{p} boldsymbol{x}, boldsymbol{d}_{boldsymbol{x} boldsymbol{y}}+ )
( boldsymbol{s}, boldsymbol{d} boldsymbol{x} boldsymbol{y}+boldsymbol{p}_{boldsymbol{x}}, boldsymbol{p}_{boldsymbol{y}}+boldsymbol{p}_{boldsymbol{x}} )
11
1571 Assertion
( C O_{2} ) molecule is linear in shape.
Reason
Any atom bonded to two other atoms
should be linear.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1572 A covalent bond is possible between:
A. Similar atoms
B. Dissimilar atoms
c. similar and Dissimilar atoms
D. similar molecules
11
1573 No. of double bond present in the Lewis
structure of ( boldsymbol{P} boldsymbol{F}_{boldsymbol{6}}^{-} ) is
11
1574 The compound in which all the bond
angles around every atom are 109.28 is:
( mathbf{A} cdot H C O O H )
B ( cdotleft(N H_{2}right)_{2} C O )
с. ( left(C H_{3}right)_{3} C O H )
D. ( left(C H_{3}right)_{3} C C H O )
11
1575 Hydrogen atoms are almost terminal
atoms in Lewis formula.
If true enter 1 , else enter 0 .
( A )
B.
( c cdot ) both
D. none
11
1576 2.55 Match the items given in Column I with examples given
Column 1 Column II
A Hydrogen bond 1. C
B. Resonance 2. LiF
C lonic solid | 3. H₂
D. Covalent solid 4. HF
5. 0, 95
11
1577 The type of hybrid orbitals used by the
chlorine atom in ( C l O_{2}^{-} ) is:
( A cdot s p^{3} )
B . ( s p^{2} )
( c cdot s p )
D. none of these
11
1578 Which of the following statements is incorrect for ( sigma ) and ( pi ) -bonds formed
between two carbon atoms?
A. ( sigma ) -bond is stronger than a ( pi ) -bond
B. Bond energies of ( sigma ) and ( pi ) -bonds are of the order of ( 264 k J / m o l ) and ( 347 k J / m o l )
C. Free rotation of surrounding atoms about a ( sigma ) -bond is allowed but not in case of a ( pi ) -bond
D. ( sigma ) -bond determines the direction between carbon atoms but a ( pi ) -bond has no primary effect in this regardd
11
1579 The ( A s F_{5} ) molecule is trigonal bipyramidal.The atomic orbitals used
by the ( A s ) atoms for bonding are:
A ( cdot d_{x^{2}-y^{2}}, d_{z}^{2}, s, p_{x}, p_{y} )
В. ( s, p_{x}, p_{y}, p_{z} )
c. ( s, p_{x}, p_{y}, p_{z}, d_{z^{2}} )
D ( cdot d_{x^{2}-y^{2}}, s, p_{x}, p_{y} )
11
1580 Co-ordinate bond is found in
A ( . H_{2} )
в. ( C l_{2} )
c. ( N H_{4} C l )
D. ( N a C l )
11
1581 Amongs the following which are
correctly matched:

This question has multiple correct options
A. Meta boric acid : ( H B O_{2} )
B. Mangnaic acid : ( H M n O_{4} )
C . Xenic acid : ( H_{2} X e O_{4} )
D. Dithionic acid : ( H_{2} S_{2} O_{6} )

11
1582 State True or False.
In one mole of a metal, there are
Avogadro’s number of molecular
orbitals.
A. True
B. False
11
1583 The correct stability order for ( N_{2} ) and its given ions is:
A ( cdot N_{2}>N_{2}^{+}>N_{2}^{-}>N_{2}^{2-} )
B . ( N_{2}^{-}>N_{2}^{+}>N_{2}>N_{2}^{2} )
C ( cdot N_{2}^{+}>N_{2}^{-}>N_{2}>N_{2}^{2-} )
D. ( N_{2}>N_{2}^{+}=N_{2}^{-}>N_{2}^{2} )
11
1584 Generally pi bond is formed from the lateral overlap of:
A. ( s-s ) orbitals
B. ( p-p ) orbital
c. ( d-d ) orbitals
D. both ( B ) and ( C )
11
1585 Which of the following has fractional
bond order?
A ( cdot O_{2}^{2+} )
B. ( O_{2}^{2} )
( mathrm{c} cdot F_{2}^{2} )
D. ( H_{2}^{-} )
11
1586 Distinguish between polar molecules and non polar molecules 11
1587 The electronegativities of two elements are 0.7 and ( 3.0 . ) The bond formed
between them would be:
A . ionic
B. covalent
c. co-ordinate covalent
D. metallic
11
1588 Which of following can have vacant ( boldsymbol{p} ) orbital?
( mathbf{A} cdot cdot cdot C H_{3} )
в. ( _{C H_{3}}^{oplus} )
( mathrm{c} cdot mathrm{CH}_{4} )
D. Both ( (B) ) and ( (C) )
11
1589 Enthalpy change for the reaction
( mathbf{4} boldsymbol{H}_{(g)} rightarrow mathbf{2} boldsymbol{H}_{mathbf{2}(boldsymbol{g})} ) is ( -mathbf{8 6 9 . 6 k J . T h e} )
dissociation energy of ( boldsymbol{H}-boldsymbol{H} ) bond is?
11
1590 Which of the following molecule species has unpaired electron(s)?
A. ( N_{2} )
в. ( F_{2} )
( c cdot O_{2} )
D. ( o_{2}^{2} )
11
1591 The correct order of dipole moment is :
A. ( C H_{4}<N F_{3}<N H_{3}<H_{2} O )
B. ( N F_{3}<C H_{4}<N H_{3}<H_{2} O )
c. ( N H_{3}<N F_{3}<C H_{4}<H_{2} O )
D. ( H_{2} O<N H_{3}<N F_{3}<C H_{4} )
11
1592 Describe the bonding in ( boldsymbol{H} boldsymbol{F} ) ?
A. s-s bonds
B. s-p bonds
c. p-p bonds
D. ( s p^{3}-p ) bonds
E ( cdot s p^{2}-s p^{2} ) bonds
11
1593 Assuming Z-axis as molecular axis, the molecular orbitals formed by the combination of atomic orbitals is
labeled as ( 2 p_{x}+2 p_{x} ) is :
A ( cdot pi 2 p_{x} )
В . ( pi p_{x} )
c. ( pi / 2 p_{x} )
D. ( pi p_{y} )
11
1594 Which is not the characteristic of ( pi- )
bond?
A. ( pi ) bond is formed when a sigma bond already exists
B. ( pi ) bonds are formed from hybrid orbitals
C. ( pi ) bond may be formed by the overlapping of p orbitals
D. ( pi ) bond results from lateral overlap of atomic orbitals
11
1595 Which of the following is most soluble in water?
A. ( C_{2} H_{5} O C_{2} H_{5} )
в. ( C_{2} H_{5} O H )
c. ( C_{2} H_{5} C O O C_{2} H_{5} )
D. ( C_{6} H_{6} )
11
1596 Choose the correct statement from the
following.
This question has multiple correct options
A. lonic bond takes place between the elements that have larger difference in their electro negativity.
B. Ionic compounds conduct electricity in their solid phase.
C. Covalent compounds exhibit isomerism.
D. ( S F_{6} ) is an example of ionic compound
11
1597 Which of the following is covalent?
A . ( N a C l )
в. ( K C l )
c. ( B e C l_{2} )
D. ( M g C l_{2} )
E ( cdot C a C l_{2} )
11
1598 Assertion: In the compound ( C H_{3} C I I_{2} C I=N, ) the most
electroegative carbon is II. Reason: Carbon atom II has more s-
character.
A. Assertion is True, Reason is True and Reason is the correct explanation for Assertion
B. Assertion is True, Reason is True and Reason is NOT a correct explanation for Assertion
c. Assertion is True, Reason is False
D. Assertion is False, Reason is True
11
1599 Identify the correct set of electrovalent compounds from the following in which the metal has electrovalency 2 and nonmetal has electrovalency 3
(A) Calcium sulphide
(B) Barium nitride
(C) Magnesium phosphide
(D) Aluminium nitride
(E) Magnesium fluoride
A. ( B & C )
в. ( B & D )
c. ( C & D )
D. ( A, B, C & E )
11
1600 Out of ( N i(C O)_{4}, N i(C N)_{4}^{2-} ) and
( N i C l_{4}^{2-} ) select paramagnetic and diamagnetic.
A ( cdot N i(C O)_{4} ) and ( N i(C N)_{4}^{2-} ) are diamagnetic
B . ( N i C l_{4}^{2-} ) is paramagnetic
c. Both (A) and
(B) Correct
D. None of these
11
1601 Sodium bicarbonate is less soluble in
water than potassium bicarbonate, it is
due to:
A. low molecular weight of ( N a H C O_{3} ) as compared to ( K H C O_{3} )
B. hydrogen bonding, sodium bicarbonate contains a dimeric anionic structure in potassium bicarbonate, anions forman infinite chain
C. hydrogen bonding, potassium bicarbonate contains a dimeric anionic structure while in sodium bicarbonate, anions form an infinite chain
D. ( K H C O_{3} ) is thermally less stable than ( N a H C O_{3} )
11
1602 The correct order of volalitity is:
( mathbf{A} cdot N H_{3}<H_{2} O )
B. p-nitro phenol C H_{3}-O-C H_{3} )
D. ( H F>H C l )
11
1603 The bond between carbon atom (1) and
carbon atom (2) in compound ( boldsymbol{N} equiv )
( C-C H=C H_{2} ) involves respectively
1
the hybrid orbitals:
A ( cdot s p^{2} ) and ( s p^{2} )
B. ( s p^{3} ) and ( s p )
c. ( s p ) and ( s p^{2} )
D. ( s p ) and ( s p )
11
1604 Covalent compounds dissolve in
organic solvents. Explain.
11
1605 Arrange the below molecules in order of
increasing ionic character
( L i F, K_{2} O, N_{2}, S O_{2} ) and ( C l F_{3} )
11
1606 In which case geometry of the molecule is pyramidal?
( mathbf{A} cdot Nleft(C H_{3}right)_{3} )
в. ( Nleft(S i H_{3}right)_{3} )
c. Both (a) and (b)
D. None of these
11
1607 State True or False.
( ln C O_{2} ) molecule, ( C O ) bond is polar but
( C O_{2} ) molecule is non-polar because the
vector sum of Dipole moment of the two
CO bond is zero.
A. True
B. False
11
1608 The total number of antibonding
electrons in ( N_{2} ) and ( O_{2} ) molecules
respectively is:
( A cdot 6,8 )
в. 5,8
c. 4,8
D. 4,6
11
1609 The high boiling point of ethanol ( 78.2^{circ} )
compared to dimethyl ether ( -23.6^{circ} )
though they have the same molecular
formula ( left[boldsymbol{C}_{2} boldsymbol{H}_{6} boldsymbol{O}right], ) is due to:
A. Hydrogen bonding
B. lonic bonding
c. co-ordinate covalent bonding
D. Resonance
11
1610 Select the incorrect statement.
A. If the orbitals differ largely in energy, the cost of hybridization energy becomes large
B. The hybridization in phosphorus between ( 3 s ) and ( 3 p- ) orbitals any be possible and the participation of ( 3 d ) orbitals in the hybridization with the ( 3 s ) and ( 3 p- ) orbitals in not expected because of their (i.e, ( 3 d ) orbital) much higher energy
C. The orbital participation generally requires to bond with highly electronegative elements
D. ( P H_{5} ) does not exist but ( P C l_{5}, P F_{5} ) exist through the formation of ( s p^{3} d^{2} ) hybridization
11
1611 Statement I: Ice is denser than water in
the liquid phase.
Because
Statement II: In water, hydrogen bonds can form between the positively charged ( mathrm{H} ) atom on one water molecule and the slightly negatively charged 0 atom on a nearby water molecule
( mathbf{A} cdot ) false, true
B. true, false
c. false, false
D. true, true, correct explanation
E. true, true, not correct explanation
11
1612 Assertion: Substances with hydrogen
bonding tend to have unusually low boiling points.
Il : Extra energy is necessary to break the hydrogen bonds.
A. Both Assertion and Reason are correct and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are correct and Reason is not the correct explanation of Assertion
c. Assertion is correct but Reason is not correct
D. Assertion is not correct but Reason is correct
E. Both the Assertion and Reason are not correct
11
1613 Why covalent character of lithium
halides follow the following order? ( boldsymbol{L} boldsymbol{i} boldsymbol{I}>boldsymbol{L} boldsymbol{i} boldsymbol{B} boldsymbol{r}>boldsymbol{L} boldsymbol{i} boldsymbol{C l}>boldsymbol{L} boldsymbol{i} boldsymbol{F} )
11
1614 The volatility of ( H F ) is low because of:
A. its low polarizability
B. the weak dispersion interaction between the molecules
c. its small molecular mass
D. its strong hydrogen bonding
11
1615 In which of the following molecules, the central atom does not have ( s p^{3} ) hybridization?
A ( . C H_{4} )
в. ( S F_{4} )
( mathbf{c} cdot B F_{4} )
D. ( N H_{4}^{+} )
11
1616 One of the resonating structure of ( boldsymbol{S O}_{4}^{-2} )
is as shown.

Which set formal charge on oxygen and
bond order is correct?
A. -0.5 and 1.5
B. 1.5 and 3
C. 2 and 3
D. 1.5 and 1.5

11
1617 Which of the compound does not has
electron linkage?
( mathbf{A} cdot K C N )
в. ( N H_{4} C l )
( mathbf{c} cdot C a C_{2} )
D. ( N H_{3} rightarrow B F_{3} )
11
1618 Assertion
Suger and alcohols are soluble in water
Reason

They have ( boldsymbol{O}-boldsymbol{H} ) bonds which bind to
water by hydrogen bonding
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect

11
1619 Find the expression that can be used to designate a linear nonpoplar molecule that contains polar bonds.
в. ( C O_{2}(g) )
( mathbf{c} cdot 2 N_{2} O(g) )
D. ( 2 N a C l(a q) )
E ( cdot H_{2} S O_{4}(a q) )
11
1620 Which of the following is/ are not paramagnetic? This question has multiple correct options
A . ( N O )
в. ( B r_{2} )
( c cdot c o )
D. ( O_{2} )
11
1621 Which of the following statements are
true with respect to electronic displacement in a covalent bond?
I. Inductive effect operates through ( pi )
bond.
II. Resonance effect operates through ( sigma ) bond.
III. Inductive effect operates through ( sigma )
bond.
IV. Resonance effect operates through ( pi )
-bond
V. Resonance and inductive effects
operate through ( sigma ) -bond.
A. III and IV
B. I and II
c. Il and IV
D. I and
11
1622 Which o the following statement is incorrect with respect to molecular orbital?
A. They are polycentric
B. They are designated as ( sigma, sigma^{*}, pi, pi^{*} ) etc
c. They have complex shapes
D. Each of these
11
1623 Which of the following is correct for ( boldsymbol{S} boldsymbol{F}_{4} )
?
A. It has a see-saw shape
B. It has two lone pairs of electrons
C. It has a square planar geometry
D. It has five bonding pairs
11
1624 Which one of the following compound
contains both ionic and covalent bond?
A ( cdot operatorname{si} 0_{2} )
в. ( B a F_{2} )
( mathbf{c} cdot N a_{2} C O_{3} )
D. ( C l_{2} O )
11
1625 The addition of energy in the form of heat causes molecules or crystals of the substance to break up into ions.
A. True
B. False
11
1626 Which of the following molecules has the smallest dissociation energy?
A ( cdot L i_{2} )
в. ( N a_{2} )
c. ( K_{2} )
D. ( C s_{2} )
11
1627 The correct order in which the 0 – 0 bond
length increases in the following is ?
A. ( H_{2} O_{2}<O_{2}<O_{3} )
в. ( O_{3}<H_{2} O_{2}<O_{2} )
c. ( O_{2}<O_{3}<H_{2} O_{2} )
D. ( O_{2}<H_{2} O_{2}<O_{3} )
11
1628 Write the Lewis structure of the nitrite
ion, ( N O_{2}^{-} )
11
1629 Which of the following is least volatile?
( mathbf{A} cdot H F )
в. ( H C l )
( mathbf{c} cdot H B r )
D. ( H I )
11
1630 When molecules are in a condensed
physical state (liquid or solid), they exert attractive intermolecular forces
(IMF), on one another. One example of this type of attractive force is hydrogen bonding.

Which of the labelled arrows ( (leftarrow text { and } leftrightarrow) ) in the diagram BEST illustrated
hydrogen bonding for ammonia, ( N H_{3} ? )
A. Hydrogen Bond
в.
c.
D. None of the above

11
1631 The hybrid state of ( S ) in ( S O_{3} ) is similar
to that of:
A. ( C ) in ( C_{2} H_{2} )
в. ( C ) in ( C_{2} H_{4} )
( mathbf{c} cdot C ) in ( C H_{4} )
D. ( C ) in ( C O_{2} )
11
1632 Q. 16 The molecular formula of the compound formed from B and C will be
(a) BC
(b) B,C
(c) BC2
(d) BC
τι
11
1633 The correct statement for the following
reaction is:
( boldsymbol{N} boldsymbol{H}_{3}+boldsymbol{H}^{+} rightarrow boldsymbol{N} boldsymbol{H}_{4}^{+} )
A. the state of hybridisation changes
B. bond angle increases
C. ( N H_{3} ) act as a Lewis acid
D. regular geometry changes
11
1634 Q3. Discuss the orbital structures of the following molecules on the basis of hybridisation.
(1) BH, (ii) CH
11
1635 ( (C-C l) ) bond in ( C H_{2}=C H-C l )
(vinyl chloride) is stabilized in the same
way as in:
A. benzyl chloride
B. ethyl chloride
c. chlorobenzene
D. allyl chloride
11
1636 Q.45 Out of H,0 and H,S, which one has higher bond angle and why: 11
1637 The molecule that deviates from octet
rule is:
A . ( N a C l )
в. ( B e C l_{2} )
( mathbf{c} cdot B H_{4}^{-} )
D. ( N H_{3} )
11
1638 Assertion
Bromoacetic acid reacts with conc.
NaOH to form ( alpha ) -ethoxy acetic acid.
Reason
It is ( S_{N} 1 ) mechanism.
Read the above assertion and reason
and choose the correct statement
regarding it.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1639 In the given, lewis structure of ( S_{2} O_{3}^{2-} )
formal charge present on sulphur
atoms 1 and 2 respectively are:
A. ( z e r o,+1 )
( mathbf{B} cdot+1,+1 )
( mathbf{c} .+2,+2 )
D. zero, zero
11
1640 The number of antibonding electrons
present in ( O_{2} ) molecular ion is:
A . 8
B. 6
( c .5 )
D. 4
11
1641 I. When iron reacts with oxygen an iron oxide compound with the formula of
( F e_{2} O_{3} ) can be formed
II. Iron atoms form cations with a
charge of +3 by losing 3 electrons and
oxygen atoms gain 2 electrons to form
an anion with a -2 charge.
A. Statement ( I ) is true, Statement ( I I ) is true and is a correct explanation of the phenomena described in 1
B. Statement I is true, Statement II is false
c. Statement I is false, statement II is true
D. Statement I is false, Statement II is false
11
1642 Consider following reactions:
( mathbf{l}: boldsymbol{N}_{mathbf{2}}+boldsymbol{O}_{mathbf{2}} rightarrow )
[
mathbf{2} boldsymbol{N} boldsymbol{O} quad triangle boldsymbol{H}=boldsymbol{X}_{mathbf{1}}
]
( |: 2 C O+O_{2} rightarrow )
( 2 C O_{2} )
[
triangle boldsymbol{H}=boldsymbol{X}_{2}
]
( |: 2 H_{2} O+O_{2} rightarrow )
[
mathbf{2} boldsymbol{H}_{mathbf{2}} boldsymbol{O}_{mathbf{2}} quad triangle boldsymbol{H}=boldsymbol{X}_{mathbf{3}}
]
( mathrm{IV}: boldsymbol{P} boldsymbol{C} boldsymbol{I}_{3}+boldsymbol{C} boldsymbol{I}_{2} rightarrow )
[
boldsymbol{P C I}_{5}
]
[
triangle boldsymbol{H}=boldsymbol{X}_{4}
]
In which case ( (s), triangle H_{f}=frac{Delta H}{2} ? )
( mathbf{A} cdot ) ।, ॥,।।
B. IV
c. ॥, ॥ ॥
( D )
11
1643 Select the correct statement.
A. Carbon-carbon bond order in graphite is more than diamond
B. Carbon-carbon bond order in graphite is less than diamond
C. Hybridization of each carbon in diamonds is ( S p_{3} )
D. Hybridization of each carbon in graphite is ( S p_{3} )
11
1644 Represent the molecule ( H_{2} O ) using
Lewis notation.
11
1645 The strength of H-bonding order is:
( mathbf{A} cdot H_{2} O>H_{2} O_{2}>H-F )
( mathbf{B} cdot H_{2} O_{2}>H_{2} O>H F )
( mathbf{c} cdot H F>H_{2} O>H_{2} O_{2} )
( mathbf{D} cdot H F=H_{2} O=H_{2} O_{2} )
11
1646 ( boldsymbol{C}(s)+boldsymbol{O}_{2}(boldsymbol{g}) rightarrow boldsymbol{C} boldsymbol{O}_{2},(boldsymbol{g}) ; boldsymbol{Delta} boldsymbol{H}= )
( -mathbf{9 4 . 3} ) kcal/mol ( C O(g)+frac{1}{2} O_{2}(g) rightarrow C O_{2}(g) ; Delta H= )
( -mathbf{6 7 . 4} ) kcal/mol
( O_{2}(g) rightarrow 2 O(g) ; Delta H=117.4 mathrm{kcal} / mathrm{mol} )
( boldsymbol{C O}(boldsymbol{g}) rightarrow boldsymbol{C}(boldsymbol{g})+boldsymbol{O}(boldsymbol{g}) ; boldsymbol{Delta} boldsymbol{H}=mathbf{2 3 0 . 6} )
kcal/mol
Calculate ( Delta boldsymbol{H} ) for ( boldsymbol{C}(boldsymbol{s}) rightarrow boldsymbol{C}(boldsymbol{g}) ) in
kcal/mol
A . 17.1
В. 154
( c cdot 117 )
D. 145
11
1647 Resonance in a molecule results in:
A. Destabilisation
B. Stabilisation
c. Increase in bond length
D. None of the above
11
1648 Which contains hydrogen bonds?
( mathbf{A} cdot H F )
в. ( H C l )
( mathbf{c} cdot H B r )
D. ( H I )
11
1649 The molecule having zero dipole
moment is:
A ( . C H_{3} C l )
в. ( C H_{2} C l_{2} )
c. ( C H C l_{3} )
D. ( C C l_{4} )
11
1650 Arrange the following species in the correct order of their stability.
( boldsymbol{C}_{2}, boldsymbol{L} boldsymbol{i}_{2}, boldsymbol{O}_{2}^{+}, boldsymbol{H} boldsymbol{e}_{2}^{+} )
A ( cdot L i_{2}<H e_{2}^{+}<O_{2}^{+}<C_{2} )
B. ( C_{2}<O_{2}^{+}<L i_{2}<H e_{2}^{+} )
( mathbf{c} cdot H e_{2}^{+}<L i_{2}<C_{2}<O_{2}^{+} )
D. ( O_{2}^{+}<C_{2}<L i_{2}<H e_{2}^{+} )
E ( cdot C_{2}<L i_{2}<H e_{2}^{+}<O_{2}^{+} )
11
1651 Assuming Z-axis as molecular axis, the molecular orbitals formed by the following combination of atomic orbitals is labeled as:
( 2 p_{z}+2 p_{z}: pi 2 p_{z} )
( A )
11
1652 The greater polarizability of anion gives rise to character for the
bond.
A . covalent
B. ionic
c. coordinate
D. none of these
11
1653 According to molecular orbital theory, which of the following will not exist?
A ( cdot H_{2}^{+} )
в. ( B e_{2} )
c. ( B_{2} )
D. ( C_{2} )
11
1654 ( boldsymbol{C H}_{2}=boldsymbol{C}=boldsymbol{C} boldsymbol{H}_{2} )
In molecule (allene)
A ( cdot ) All three ( C ) -atoms are ( s p^{2} ) hybridized
B. Both terminal C-atoms are ( s p^{2} ) hybridized while central C-atom is sp-hybridized
c. Both terminal C-atoms are sp-hybridized whilecentral C-atom is ( s p^{2} ) -hybridized
D. None of these
11
1655 In which species does the specifed atom have an incomplete outer shell?
A. ( B F_{3} ) (B)
B. ( C H_{3}^{-}(mathrm{C}) )
( mathrm{c} cdot F_{2} mathrm{O}(mathrm{F}) )
D. ( H_{2} O^{+}(0) )
11
1656 Which of the following species have undistorted octahedral structures?
1. ( boldsymbol{S F}_{mathbf{6}} )
2. ( boldsymbol{P F}_{mathbf{6}}^{-} )
3. ( boldsymbol{S} boldsymbol{i} boldsymbol{F}_{boldsymbol{6}}^{2-} )
4. ( boldsymbol{X} boldsymbol{e} boldsymbol{F}_{boldsymbol{6}} )
A. 2,3 and 4
B. 1,3 and 4
( c .2 ) and 3
D. 1,2 and 3
11
1657 Stability of the species ( L i_{2}, L i_{2}^{-} ) and
( L i_{2}^{+} ) increases in the order of :
A ( cdot L i_{2}<L i_{2}^{+}<L i_{2} )
B . ( L i_{2}^{-}<L i_{2}<L i_{2}^{+} )
C ( cdot L i_{2}<L i_{2}^{-}<L i_{2}^{+} )
D. ( L i_{2}^{-}<L i_{2}^{+}<L i_{2} )
11
1658 Assertion
( O-O ) bond length in ( H_{2} O_{2} ) is shorter
than that of ( boldsymbol{O}_{2} boldsymbol{F}_{2} )
Reason
( H_{2} O_{2} ) is a covalent compound.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
1659 10. Which of the following sets of molecules have different
shapes but same hybridization of the central atoms?
(a) NH,H,O (b) H,S, SO,
(c) Ni(CO)4 [NiC1,12- (d) SF, PCI,
11
1660 Formal charge on nitrogen and oxygen
in ( N O_{3}^{-} ) ion are respectively:
A ( cdot_{0, frac{-1}{3}} )
в. ( +1, frac{-1}{3} )
( c cdot+1, frac{-2}{3} )
D. ( _{0, frac{-2}{3}} )
11
1661 Which of the following is true due to intermolecular H- bonding in HF?
A. High boiling point liquidd
B. Capable of forming two series of salt
c. Dibasic
D. capable of forming acid salt
11
1662 In water molecule, the two ( boldsymbol{O}-boldsymbol{H} )
bonds are oriented at an angle of ( 104.5^{circ} )
( ln B F_{3}, ) the three ( B-F ) bonds are
oriented at an angle of ( 120^{circ} . ln B e F_{2} )
the two ( B e-F ) bonds are oriented at
an angle of ( 180^{circ} . ) Which of the following will have highest dipole moment?
A. ( B e F_{2} )
в. ( B F_{3} )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. All have zero dipole moment
11
1663 Increasing order of sizes of hybrid
orbitals is:
В ( cdot s p^{3}, s p^{2}, s p )
( mathbf{c} cdot s p^{2}, s p^{3}, s p )
D. ( s p^{2}, s p, s p^{3} )
11
1664 Which of the following molecules
exhibit resonance?
I. ( boldsymbol{A} boldsymbol{s} boldsymbol{F}_{mathbf{5}} )
।. ( boldsymbol{H} boldsymbol{N} boldsymbol{O}_{mathbf{3}} )
III. ( boldsymbol{S O}_{2} )
A. I only
B. II only
c. II and III
D. III and IV
E . ।, II, and III
11
1665 When the hybridization state of carbon
atom changes from ( s p^{3} ) to ( s p^{2} ) and
finally to ( s p, ) the angle between the
hybridized orbitals?
A. Decreases gradually
B. Decreases considerably
c. Is not affected
D. Increases progressively
11
1666 o-Hydroxy benzaldehyde is a liquid at room temperature while p-hydroxy benzaldehyde is a_- – melting solid.
A. low
B. equal
c. high
D. none
11
1667 Find out shape and hybridisation of the
following molecules ( left(boldsymbol{P} C l_{5}, boldsymbol{N} boldsymbol{H}_{3}, boldsymbol{H}_{2} boldsymbol{O}right. )
( boldsymbol{S F}_{6} )
11
1668 Which Lewis structure would produce a
molecule with a linear geometry?
A ( . A X_{2} )
в. ( A X_{2} E_{2} )
( mathrm{c} cdot A X_{3} )
D. ( A X_{3} E )
11
1669 6 Write the favourable factors for the formation of ionic bond. 11
1670 The structure of ( X e F_{2} ) involves
hybridization of the type:
( A cdot s p^{3} )
B. ( d s p^{2} )
( mathrm{c} cdot s p^{3} d )
D. ( s p^{3} d^{2} )
11
1671 The number of lone pair(s) of electrons
on the central atom in ( left[boldsymbol{B} boldsymbol{r} boldsymbol{F}_{4}right]^{-}, boldsymbol{X} boldsymbol{e} boldsymbol{F}_{6} )
and ( left[boldsymbol{S b C l}_{mathbf{6}}right]^{3-} ) are respectively:
( mathbf{A} cdot 2,1 ) and 1
B. 2,1 and 0
c. 2,0 and 1
D. 1,0 and 0
11
1672 ( X e O F_{4} ) contains:
A. six electron pairs forming an octahedron with two positions occupied by lone pairs
B. two ( pi ) -bonds and the remaining six electron pairs forming an octahedron
C. three ( pi ) -bonds and the remaining four electron pairs forming a tetrahedron
D. one ( pi ) -bonds and the remaining six electron pairs forming an octahedron with one position occupied by ( a )
lone pair
11
1673 Number of paramagnetic molecules
from the following are:
( boldsymbol{C N}^{-}, boldsymbol{N O}, boldsymbol{O}_{2}^{2-}, boldsymbol{O}_{2}, boldsymbol{N} boldsymbol{O}_{2}, boldsymbol{O}_{2}^{-}, boldsymbol{B}_{2}, boldsymbol{C}_{2}, boldsymbol{l} )
11
1674 Which pair is not correct order of lattice
energy?
A. ( K C I>M g O )
в. ( A l N>M g O )
c. ( B e C O_{3}>M g C O_{3} )
D. ( K C I<M g O )
11
1675 23. The correct order of increasing C-0 bond lengths in
CO, CO2- and CO2 is:
(a) CO?-<CO, <CO (b) CO<CO – < CO,
(c) co, – <CO (d) CO<co, <co
11
1676 On hybridization of one s-orbital and
one p-orbital we get:
A. mutual perpendicular orbitals
B. two orbitals at ( 180^{circ} ) to each other
C. four orbitals directed tetraheadrally
D. three orbitals in one plane
11
1677 Which of the following statement is
correct?
A. Sigma bond is weaker than pie-bond
B. ( H F ) is less polar than ( H I )
( mathrm{C} cdot ln N H_{4}^{+} ) ions 4 coordinate bond is present
D. ( ln S F_{6} ) all ( S-F ) bond length are same
11
1678 Assertion
During covalent bonding the electronegativity difference between
two atoms is greater than 1.7
Reason
Covalent bond is formed by sharing of electrons between atoms that have
same size
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1679 Assertion
If the hydrogen atoms of benzene are replaced by deuterium atoms then the reactivity of benzene ring is decreased
for ESR.
Reason
The bond strength of ( C ) -D is more than ( C ) –
H, so reaction depends on the bond strength of ( C-D ) and ( C-H )
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
1680 Among the following molecules in
increasing order of ( sigma ) to ( pi ) bond ratio.
(1)
(2)
(3)
(4)
( mathbf{A} cdot 2<3<4<1 )
B . ( 2<4<3<1 )
c. ( 3<2<1<4 )
D. ( 2<3<1<4 )
11
1681 Q. 15 Stable form of C may be represented by the formula
(b) C₂
(c) C₃
(d) CA
11
1682 In ( N_{2} ) molecule, the atoms are bonded
by:
A . one ( sigma, ) two ( pi ) bonds
в. one ( sigma ), one ( pi ) bonds
c. ( t w o sigma, ) one ( pi ) bonds
D. three ( sigma ), one ( pi ) bonds
11
1683 Energy required to break ethane into its
constituent atoms is ( 2860 K J ). If the
( C-H ) bond energy is ( 420 mathrm{KJ}, ) the ( C-C )
bond energy is:
11
1684 Bond energy of a molecule is:
A . always positive
B. either positive or negative
c. always negative
D. dependent on the physical state of the system
11
1685 During the formation of ( N a C l ), transfer
of electron is from ( X ) orbital of ( N a ) to
the ( Y ) orbital of ( C l . ) Then ( X ) and ( Y ) are
respectively:
A. ( 3 s ) and ( 3 s )
B. ( 3 s ) and ( 3 p )
c. ( 3 p ) and ( 3 s )
D. ( 3 p ) and ( 3 p )
11
1686 The hybridization of atomic orbitals of
nitrogen in ( N O_{2}^{+}, N O_{3}^{-} ) and ( N H_{4}^{+} ) are:
A ( . s p, s p^{3} ) and ( s p^{2} ) respectively
B. ( s p, s p^{2} ) and ( s p^{3} ) respectively
( mathrm{c} cdot s p^{2}, mathrm{sp} ) and ( s p^{3} ) respectively
D. ( s p^{2}, s p^{3} ) and sp respectively
11
1687 ( triangle H ) of which of the following reaction is
zero?
( mathbf{A} cdot H_{2}(g) rightarrow 2 H^{+}(g)+2 e^{-} )
B ( cdot 2 H(g)+a q rightarrow 2 H^{+}(a q)+2 e^{-} )
( mathbf{c} cdot 2 H(g) rightarrow 2 H^{+}(g)+2 e^{-} )
D ( cdot H_{2}(g)+a q rightarrow 2 H^{+}(a q)+2 e^{-} )
11
1688 Discuss the shape of the following molecule using VSEPR model:
( A s F_{5} ) and ( P H_{3} )
11
1689 Explain:
1) Stability of +3 state in nitrogen family increases from top to bottom.
2)Amongst ( L i F ) and ( L i I ) which has more covalent character.
11
1690 Which of the following compounds possesses zero dipole moment?
A. ( H_{2} O )
в. ( C H_{3} F )
c. ( C C l_{4} )
D. ( B F_{3} )
11
1691 Select the correct statement.
( mathbf{A} cdot S F_{4}, C H_{4}, S i C l_{4} ) and ( C C l_{4} ) have tetrahedral structure
B. ( B F_{3}, C l F_{3} ) and ( I C l_{3} ) have trigonal planar structure
C ( . X e F_{2}, B e C l_{2} ) and ( I C l_{2}^{-} ) have linear structure
D. All are correct
11
1692 (22) Tellalleural
06. Write the state of hybridisation of boron in BF 3.
11
1693 Diethyl ether is mostly used in solvent
extraction due to all of the following
reasons except:
A. Its solvation capacity is very high
B. being inert, it does not react with most organic compound
C. there are two lone pairs in it, therefore it acts as a strong nucleophile
D. its boiling point is low, therefore, it can be easily separated by distillation
11
1694 The electronic structure of four
elements a, b, c, d respectively are:
(a) ( 1 s^{2} )
(b) ( 1 s^{2} 2 s^{2} 2 p^{2} )
( (c) 1 s^{2} 2 s^{2} 2 p^{5} )
(d) ( 1 s^{2} 2 s^{2} 2 p^{6} )
The tendency to form electrovalent bond will be largest in :
( A cdot A )
B. B
( c cdot c )
D.
11
1695 The ratio of number of lone pairs in
( N H_{3}, H_{2} O ) and ( X e F_{2} ) is :
A .3: 2: 1
B. 2: 1: 3
( mathrm{c} cdot 1: 2: 3 )
D. 2: 3: 1
11
1696 The correct order of bond
angle(smallest first) in ( boldsymbol{H}_{2} boldsymbol{S}, boldsymbol{N} boldsymbol{H}_{3}, boldsymbol{B} boldsymbol{F}_{3} )
and ( boldsymbol{S} boldsymbol{i} boldsymbol{H}_{4} ) is:
A. ( H_{2} S<N H_{3}<B F_{3}<S i H_{4} )
B. ( N H_{3}<H_{2} S<S i H_{4}<B F_{3} )
c. ( H_{2} S<N H_{3}<S i H_{4}<B F_{3} )
D. ( H_{2} S<S i H_{4}<N H_{3}<B F_{3} )
11
1697 The sigma bonds present in benzene ring are: 11
1698 Which of the following bonds has the
higher energy?
A. ( S e-S e )
в. ( T e-T e )
c. ( s-s )
D. ( O-O )
11
1699 melting points and boiling points due to
relatively weak intermolecular
attractions that hold the molecules in
their solid form.
( t^{circ}(C) ) Molecular Solid ( quad ) Boiling Point
( H_{2} T e ) 0
( H_{2} S e ) -50
( H_{2} S ) -75
( H_{2} O ) 100
Which of the following reasons explain
why ( H_{2} O ) does not appear to follow this
fact?
( mathbf{A} cdot H_{2} O ) is relatively small compared to the other molecules
B. ( H_{2} O ) is not a molecular solid
C. ( H_{2} O ) have hydrogen bonding
D. ( H_{2} O ) is ionicly bonded while the others are covalently bonded
11
1700 The molecular formula of the first
member of alkenynes and its name is
given by the set:
A ( cdot C_{3} H_{2}, ) Alkene
B. ( C_{5} H_{6} ), Pent-1-en-3-yne
C. ( C_{6} H_{8} ), Hex-1-en-5-yne
D. ( C_{4} H_{4}, ) But-1-en-3-yne
11
1701 The correct order of strength of bonds is:
A. ( s-s>s-p>p-p )
В. ( s-s<s-ps-s>p-p )
D. ( s-s>p-p>s-p )
11
1702 Which of the following statements is/are true?
1) ( P H_{5} ) and ( B i C l_{5} ) do not exist.
2) ( p pi-d pi ) bond is present in ( S O_{2} )
3) ( I_{3}^{+} ) has bent geometry.
4) ( operatorname{Se} F_{4} ) and ( C H_{4} ) have same shape
( A cdot 1,2,3 )
в. 1, 3
( c cdot 1 ) and 2
D. 1,2,4
11
1703 The correct order of lattice energy is:
( mathbf{A} cdot L i F>C a F_{2}>M g O )
B. ( M g O>C a F_{2}> ) LiF
( mathbf{c} cdot C a F_{2}>M g O>L i F )
D. ( C a F_{2}>L i F>M g O )
11
1704 Atomic orbitals involved in
hybridization of ( S F_{6} ) molecule:
B . ( 3 s, 3 p_{x}, 3 p_{y}, 3 p_{z}, 3 d_{z} )
( mathbf{c} cdot 4 s, 4 p_{x}, 4 p_{y}, 4 p_{z}, 3 d_{x^{2}-y^{2}}, d_{x y} )
D. ( 3 s, 3 p_{x}, 3 p_{y}, 3 d_{x y}, 3 d_{d z}, 3 d_{x z} )
11
1705 Which of the following structures has a dipole moment in terms of atom and unbonded electron pair placement from a Lewis Dot structure view?
A ( . I F_{4}^{1} )
в. ( X e F_{4} )
( mathrm{c} cdot I F_{4}^{1} )
D. ( N H_{4}^{1} )
11
1706 A covalent bond is formed by:
A. transfer of electrons
B. sharing of electrons by only a single atom
C. sharing of electrons
D. repulsions of atoms between two atoms
11
1707 State True or False.
( K O_{2} ) is paramagnetic.
A. True
B. False
11
1708 Select the correct diagram for anti-
bonding molecular orbitals which are formed by side-way overlapping
This question has multiple correct options
( A )
B.
( c )
( D )
11
1709 The melting point of ( M g C l_{2} ) is greater
than that of ( B a C l_{2} ). Give reason?
11
1710 Which of the following is a common characteristic of a covalent compound?
A. High melting point
B. Conducts electricity when it is in the molten state
c. consists of molecules
D. Always soluble in water
11

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