The S-block Elements Questions

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

List of the s-block elements Questions

Question No Questions Class
1 Of the following the commonly used as a laboratory desiccator is :
A. ( N a_{2} C O_{3} )
в. ( C a C l_{2} )
c. Nacı
D. None of the above
11
2 Which is the major constituent of gun
powder?
A. Nitre
B. Sulphur
c. charocal
D. Chile salt petre
11
3 The solubility in water is more for:
A. ( B a C O_{3} )
в. ( B e C O_{3} )
( mathrm{c} cdot mathrm{CaCO}_{3} )
D. ( M g C O_{3} )
11
4 The element having greatest difference between its first and second ionization
energies is:
A. ( C a )
в. ( K )
( c . B a )
D. ( S e )
11
5 Slaked lime is obtained when water is
added to:
A ( cdot operatorname{CaSO}_{4} cdot frac{1}{2} mathrm{H}_{2} mathrm{O} )
в. ( C a C l_{2} )
( c cdot C a O )
D. ( C a C O_{3} )
11
6 State whether the given statement is
true or false:

A solution of a substance ( X ) is used for
white washing. The reaction of the
substance ( X ) is with water is:
( boldsymbol{C a O}(boldsymbol{s})+boldsymbol{H}_{2} boldsymbol{O}(boldsymbol{l}) rightarrow )
Calcium oxide
( boldsymbol{C} boldsymbol{a}(boldsymbol{O} boldsymbol{H})_{2}(boldsymbol{a} boldsymbol{q}) )
Calcium hydroxide
A. True
B. False

11
7 In Solvay ammonia process, sodium
bicarbonate is precipitated due to
A . presence of ( N H_{3} )
B. reaction with ( C O_{2} )
C. reaction with brine solution
D. reaction with NaOH
11
8 Alkali metals cannot be extracted by
reduction of their oxides and other
compounds because:
A. alkali metals are strong reducing agents
B. alkali metals have low ionisation enthalpy
C. alkali metals have high lattice enthalpy
D. alkali metals are strongly basic in nature
11
9 Baking powder is a mixture of:
A. Sodium carbonate and acetic acid
B. Sodium carbonate and tartaric acid
C. Sodium hydrogen carbonate and tartaric acid
D. Sodium hydrogen carbonate and acetic acid
11
10 Lithium on heating in air forms mainly
( L i_{2} O ) (oxide) and not peroxide ( left(L i_{2} O_{2}right) )
If true enter 1 else 0
11
11 The reaction that takes place when ( C l_{2} )
gas is passed through conc. NaOH
solution is :
A . oxidation
B. reduction
c. displacement
D. disproportionation
11
12 “Alkali metals dissolve in liquid
ammonia to give green coloured solutions which upon standing slowly
liberate ( boldsymbol{H}_{2} ). The green colour of metalammonia solutions is due to the
presence of solvated electrons.”
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0
11
13 Molten sodium chloride conducts
electricity due to the presence of:
A. free electrons
B. free molecules
c. atoms
D. free ions
11
14 In which case second has lower boiling point than first? This question has multiple correct options
A . Li, K
в. Ве, Мg
( c cdot operatorname{li}, c s )
D. са, мв
11
15 Soda ash is prepared by passing over a concentrated solution
of sodium hydroxide.
A ( . H_{2} )
в. ( O_{2} )
( mathrm{c} cdot H_{2} )
D. ( C O_{2} )
11
16 Arrange
( boldsymbol{N} boldsymbol{a}^{+}, boldsymbol{M} boldsymbol{G}^{2+}, boldsymbol{O}^{2-}, boldsymbol{F}^{-} boldsymbol{A} boldsymbol{l}^{3+}, boldsymbol{N}^{3-} )
(each having 10 electrons) in increasing
ionic radii.
( mathbf{A} cdot A l^{3+}<M g^{2+}<N a^{+}<F^{-}<O^{2-}<N^{3-} )
B. ( N^{3-}<O^{2}<F^{-}<N a^{+}<M g^{2+}<A l^{3+} )
C ( cdot A l^{3+}<M g^{2+}<F^{-}<N a^{+}<O^{2-}<N^{3-} )
D. None of these
11
17 Which of the following statement is
incorrect?
A. Sodium and potassium are soft and silvery white metals.
B. Sodium and potassium in air get tarnished due to the formation of a layer of oxide or carbonates.
C. Sodium and potassium burn in dry oxygen (excess) gives peroxides.
D. Sodium and potassium are kept under kerosene to avoid contact with air and moisture.
11
18 Alkali metals impart blue color to:
A. acidic solution
B. ammonia solution
c. nitrate solution
D. none of these
11
19 Which of the following is/are
constituents of cement??
A. ( operatorname{si} O_{2} )
в. ( A l_{2} O_{3} )
( mathrm{c} cdot mathrm{CaSO}_{4} )
D. All of the above
11
20 The most lightest alkaline earth metal
is:
( A . B e )
в. ( M g )
( c . C a )
D. Ba
11
21 Solubility of the alkaline earth’s metal sulphates in water decreases in the
sequence:
A. ( S r>C a>M g>B a )
в. ( B a>M g>S r>C a )
c. ( M g>C a>S r>B a )
11
22 Gypsum on heating gives:
This question has multiple correct options
( ^{mathbf{A}} cdot operatorname{CaSO}_{4} cdot frac{1}{2} H_{2} O )
B ( cdot C a S O_{4} )
( mathbf{c} cdot C a O )
( mathbf{D} cdot C a S+O_{2} )
11
23 0.17 The formula of soda ash is
(a) Na ,CO, 101,0
(c) Na2CO3.H2O
(b) Na2CO, 2H,0
(d) Na2CO3
11
24 In seas, mainly how do marine organism build their shells? 11
25 The solubility of II group hydroxides
increases with molecular weight. This is
because:
A. lattice energy is same but hydration energy decreases down the group.
B. hydration energy is same but lattice energy decreases down the group
C. both lattice and hydration energy increase down the group
D. decrease in lattice energy down the group is faster than decrease in hydration energy.
11
26 “Lithium is the only metal among alkali
metals that can form nitride.”

Answer whether the above statement is
true or false.
If true enter 1 , else enter 0

11
27 Q Type your question
One of the chief uses of sodium
carbonate has been in the conversion of
( operatorname{Ca}(O H)_{2}(s) ) to concentrated aqueous solution of NaOH which in turn was
used in the manufacture of soap.
( boldsymbol{C a}(boldsymbol{O H})_{2}(boldsymbol{s})+boldsymbol{2} boldsymbol{N} boldsymbol{a}^{+}(boldsymbol{a q})+ )
( boldsymbol{C O}_{3}^{2-}(boldsymbol{a q}) rightleftharpoons boldsymbol{C a C O}_{3}(boldsymbol{s})+ )
( mathbf{2} N boldsymbol{a}^{+}(boldsymbol{a} boldsymbol{q})+mathbf{2} boldsymbol{O} boldsymbol{H}^{-}(boldsymbol{a} boldsymbol{q}) )
In ( 1775, ) in order to gain independence from the importation of natural
( N a_{2} C O_{3}, ) the French government
offered a prize to anyone who could
devise a process to prepare ( N a_{2} C O_{3} )
from NaCl

A more economical process but based
on the same principle was given by :
A. Solvay
B. Leblanc
c. williamson
D. Haber

11
28 Among ( L i C l, R b C l, B e C l_{2} ) and ( M g C l_{2} )
which two are the highest and the lowest ionic compounds?
A. ( L i C l ) & ( R b C l )
в. ( R b C l & B e C l_{2} )
c. ( R b C l & M g C l_{2} )
D. ( M g C l_{2} & B e C l_{2} )
11
29 When sodium is dissolved in pure
liquid ammonia, then along with ( boldsymbol{H}_{2} )
the other product formed is:
A. sodium
B. sodium amide
c. sodium ammoniate
D. sodium tetra ammoniate
11
30 41. Which of the following is very
reactive and kept in kerosene?
(1) Sodium (2) Potassium
(3) Iodine (4) Bromine
11
31 Q5. Explain the following:
(a) Why Cs is considered as the most electropositive element?
(6) Lithium cannot be used in making photoelectric cells.
(c) Lithium does not form alums.
11
32 Q16. Why is BeCl, soluble in organic solvent? 11
33 ( boldsymbol{B} boldsymbol{e} boldsymbol{C l}_{2}+boldsymbol{L} boldsymbol{i} boldsymbol{A} boldsymbol{l} boldsymbol{H}_{4} longrightarrow boldsymbol{X}+boldsymbol{L} boldsymbol{i} boldsymbol{C l}+ )
( boldsymbol{A l C l}_{3} )
A. ( X ) is lithium hydride
B. ( X ) is ( B e H_{2} )
c. ( X ) is ( B e C l_{2} cdot 2 H_{2} O )
D. ( X ) is ( L i H )
11
34 Which of the following imparts violet colouration to the Bunsen burner non-
luminous flame?
( mathbf{A} cdot N a C l )
в. ( B a C l_{2} )
c. ( C a C l_{2} )
D. KCl
11
35 Be ( O ) is almost insoluble but ( B e S O_{4} ) is
soluble in water. Explain.
11
36 When magnesium ammonium phosphate is heated, it is converted to:
A. magnesium pyrophosphate
B. magnesium oxide
c. magnesium phosphate
D. magnesium nitride
11
37 Which are true statements about ( s )
block elements?
This question has multiple correct options
A. Metals are obtained by the electrolytic of fused chlorides.
B. Oxides are basic except Be0
C ( .+1 ) valency by alkali metals and +2 valency alkaline earth metals is shown
D. carbonates are thermally stable
11
38 Suspension of slaked lime in water is
known as:
A . lime water
B. quick lime
c. milk of lime
D. aqueous solution of slaked lime.
11
39 Fluorides and phosphates of alkali metals are:
A. completely soluble in water
B. sparingly soluble in water
C. completely soluble in water except ( L i ) and ( M g )
D. completely insoluble in water except ( L i ) and ( M g )
11
40 What is the chemical composition of
Nicol prism?
A. ( A l_{2} O_{3} )
в. ( mathrm{CaSO}_{4} )
( mathrm{c} cdot mathrm{CaCO}_{3} )
D. ( N a_{3} A l F_{6} )
11
41 Which of the following reactions is called slaking of lime?
A ( cdot C a C O_{3} rightarrow C a O+C O_{2} )
в. ( C a O+2 H C l rightarrow C a C l_{2}+H_{2} O )
c. ( C a O+H_{2} O rightarrow C a(O H)_{2}+ ) heat
D. ( C a C O_{3}+N a C l rightarrow N a_{2} C O_{3}+C a C l_{2} )
11
42 The elements that reacts with cold
water:
A . Mg
B. Са
( c . ) Ве
D. Mg & Ca
11
43 The list gives four experiments done with calcium carbonate.
acid added
2 alkali added
3 heated strongly
4 water added
Which experiments produced carbon dioxide?
A. 1 and 2
B. 1 and 3
( c cdot 2 ) and 3
D. 2 and 4
11
44 Potash alum is represented by the formula:
A ( cdot K_{2} S O_{4} cdot A l_{2}left(S O_{4}right)_{3} cdot 24 H_{2} O )
B . ( K cdot A lleft(S O_{4}right)_{2} cdot 12 H_{2} O )
c. Both (a) and (b)
D. None of these
11
45 Choose the correct options regarding
the nature of oxides formed by ( L i ) and
( boldsymbol{B e}: )
This question has multiple correct options
A ( cdot L i_{2} O ) is acidic while ( B e O ) is basic
B. ( B e O ) is amphoteric.
( mathrm{c} cdot mathrm{Li}_{2} mathrm{O} ) is basic
D. ( L i_{2} O ) and ( B e O ) both are amphoteric
11
46 Draw a structure of ( B e C l_{2} ) in vapour
phase.
11
47 Dilute nitric acid was added to the
calcium oxide.
11
48 Assertion
Sodium reacts with oxygen to form
( N a_{2} O_{2} ) but postassium reacts with
oxygen to form ( K O_{2} )
Reason
Potassium is more reactive metal than
sodium.
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
49 Assertion
The superoxide ( M O_{2} ) contains the
paramagnetic ion ( boldsymbol{O}_{mathbf{2}}^{-} )
Reason
( O_{2}^{-} ) is stable in presence of large
cations as ( boldsymbol{K}, boldsymbol{R} boldsymbol{b}, boldsymbol{C} boldsymbol{s} )
Read the above assertion and reason
and choose the correct option regarding
¡t.
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
50 Two metals ( X ) and ( Y ) belong to the
second group of the periodic table. ( boldsymbol{X} ) forms insoluble oxide but soluble
sulphate. ( Y ) forms a soluble oxide but
insoluble sulphate. The hydroxide of
metal ( X ) is soluble in ( N a O H ) while that
of metal ( Y ) is insoluble in ( N a O H . ) What
are metals ( X ) and ( Y ? )
A. ( X=B e, Y=B a )
в. ( X=M g, Y=C a )
c. ( X=C a, Y=S r )
D. ( X=B a, Y=M g )
11
51 “Be dissolves in alkali to give
( N a_{2} B e O_{2} ) and ( H_{2} )
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0
11
52 0.27 Choose the correct statements from the following.
(a) Beryllium is not readily attacked by acids because of the presence of an oxide
film on the surface of the metal
(b) Beryllium sulphate is readily soluble in water as the greater hydration enthalpy
of Be + overcomes the lattice enthalpy factor
(c) Beryllium exhibits coordination number more than four
(d) Beryllium oxide is purely acidic in nature
11
53 The list gives four experiments carried out with calcium carbonate.
1 acid added
2 alkali added
3 heated strongly
4 water added
Which experiments produce carbon dioxide?
A. 1 and 2
B. 1 and 3
( c cdot 2 ) and 3
D. 2 and 4
11
54 Following reaction is used to remove temporary hardness which is due to
dissolved bicarbonates of ( C a^{2+} ) and
( M g^{2+} )
( boldsymbol{C a}left(boldsymbol{H} boldsymbol{C O}_{3}right)_{2}+boldsymbol{C a}(boldsymbol{O H})_{2} rightarrow )
( 2 C a C O_{3} downarrow+2 H_{2} O )
Actually lime ( ( C a O ) ) is added which in
( H_{2} O ) forms ( C a(O H)_{2} ) and precipitates
( boldsymbol{C a} boldsymbol{C O}_{3} boldsymbol{C a O}+boldsymbol{H}_{2} boldsymbol{O} rightarrow boldsymbol{C a}(boldsymbol{O H})_{2} )
If ( 10 mathrm{L} ) of hard water requires ( 0.56 mathrm{g} ) of Ca 0 , temporary hardness of ( C a C O_{3} ) is
( x times 10^{2} ) ppm. Find ( x )
11
55 Metallic calcium is prepared by:
A. displacement of calcium by iron from calcium sulphate solution
B. electrolysis of molten calcium chloride
C. reduction of lime by coke
D. electrolysis of aqueous solution of calcium nitrate
11
56 The product obtained on fusion of
( B a S O_{4} ) and ( N a_{2} C O_{3} ) is:
A. ( B a C O_{3} )
в. Ва О
( mathbf{c} cdot B a(O H)_{2} )
D. ( B a H S O_{4} )
11
57 Q. 31 Complete the following reactions
(1) 0₂ ² + H₂O
(11) 0₂ + H₂O
11
58 Passivity is exhibited by:
( A) B e, B) M g, C) A l, D) B )
A ( . A, B )
в. ( B, C )
c. ( A, C )
D. ( B, D )
11
59 Statement: Sodium, when heated in
excess of oxygen, gives sodium oxide.
State whether the given statement is
true or false.
A. True
B. False
11
60 Assertion
Group 2 metals have higher melting points when compared to the group 1
metals.
Reason
+2 charge on the cations in the metallic
lattice causes them to be more strongly
attracted to the sea of electrons and
making it difficult to pull them apart.
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
61 ANS. IL 15 anyuruus Calcium Sulputate ca
Q8. What is Quick lime? What happens when it is added to water?
11
62 When exposed to air, sodium
carbonate crystals lose water, turn into
( mathbf{a}: )
A. monohydrate
B. nanohydrate
c. decahydrate
D. hexahydrate
11
63 2.52 An element of group 2 forms covalent oxide which is amphoteric in
nature and dissolves in water to give an amphoteric hydroxide. Identity
the element and write chemical reactions of the hydroxide of the
element with an alkali and an acid.
11
64 Find the number of chloride(s) which do not impart color to the flame from the
following:
( boldsymbol{B} boldsymbol{e} boldsymbol{C l}_{2}, boldsymbol{S r} boldsymbol{C l}_{2}, boldsymbol{M} boldsymbol{g} boldsymbol{C l}_{2}, boldsymbol{C a C l}_{2}, boldsymbol{B a C l}_{2} )
11
65 The low solubility of LiF and that of Cs|
in water are respectively due to which of the properties of the alkali metal ions?
A. Higher hydration enthalpy of ( L i^{+} ), higher lattice enthalpy of ( C s^{+} )
B. Smaller hydration enthalpy of ( L i^{+} ), higher lattice enthalpy of ( C s^{text {t }} )
C. smaller lattice enthalpy of ( L i^{+} ), higher hydration enthalpy of ( C s^{+} )
D. Higher lattice enthalpy of ( L i^{+} ), Smaller hydration enthalpy of ( C s^{text {t }} )
11
66 What are the uses of sodium
bicarbonate? (Any three)
11
67 Q1. Why are alkali metals always univalent? Which alkali metal ion forms largest hydrated ion in
aqueous solution?
11
68 To pour water on calcium oxide.”which
is another way to classify this reaction? Explain
11
69 A major constituent of natural gas is:
A ( . quad ) NaH ( mathrm{CO}_{3} )
в. ( H_{2} S O_{4} )
( mathrm{c} cdot mathrm{CH}_{4} )
D. ( C a(O H)_{2} )
11
70 Q23. Why is Lif almost insoluble in water whereas LiCl soluble not only in water but also in
acetone?
T
.
TE
11
71 Only those elements of s-block can produce superoxides which have :
A. High ionisation energy
B. High electronegativity
c. High charge density
D. Low ionisation potential
11
72 The following flow diagram represents the manufacturing of sodium
carbonate?
( mathbf{2} boldsymbol{N} boldsymbol{H}_{3}+boldsymbol{H}_{2} boldsymbol{O}+boldsymbol{C} boldsymbol{O}_{2} longrightarrow )
( left(N H_{4}right)_{2} C O_{3}(a q) stackrel{(a)}{longrightarrow} N H_{4} H C O_{3} stackrel{(b)}{longrightarrow} )
( boldsymbol{N} boldsymbol{a} boldsymbol{H} boldsymbol{C O}_{3}+(boldsymbol{c}) )
( downarrow(d) )
( N a_{2} C O_{3}+C O_{2}+H_{2} O )
Which of the following option describes the underlined reagents, products and reaction conditions?
A ( cdot ) (a) – Carbon dioxide, ( (b)-N a C l,(c)-N H_{4} C l, ) (d) – Heat
B. (a) – Carbon dioxide, (b) – ( N a C l ), (c) ( -N H_{4} C l ), (d) Catalyst
c. (a) – Higher tempt., (b) – ( N a C l ), (c) ( -N H-4 C l ), (d) Heat
D. (a) – Higher pressure, (b) – ( N a C l ), (c) ( -N H_{4} C l ), (d) Catalyst
11
73 As the nuclear charge increases from neon to calcium, the orbital energies:
A. increase
B. increase very rapidly
c. increase very slowly
D. fall
11
74 “Sodium metals when dissolved in
ammonia gives a non-conducting solution.”
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0
11
75 Be on dissolving in aqueous ( N a O H )
yields:
A. ( N a_{2} B e O_{2} )
B ( cdot N a_{2}left[operatorname{Be}(O H)_{4}right] )
c. ( operatorname{Na}left[operatorname{Be}(O H)_{3}right] )
D. Both (A) and (B)
11
76 Consider the following statements and arrange in the order of true/false as given in the codes.
( S_{1}: ) Sodium amalgam reacts with hot water and produces sodium hydroxide and hydrogen gas.
( S_{2}: ) Sodium is more reactive than
potassium.
( S_{3}: ) Alkaline earth metals dissolve in liquid ammonia to give deep blue-black solutions which are conducting.
( S_{4}: ) Alkaline earth metal salts have
more number of water molecules as
compared to those of alkali metal salts.
A. TTFF
в. тFा
c. FTT
D. TFFT
11
77 Q. 44 Assertion (A) The carbonate of lithium decomposes easily on heating to
form lithium oxide and CO2.
Reason (R) Lithium being very small in size polarises large carbonate
ion leading to the formation of more stable Li,0 and CO2.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are correct but is not the correct explanation of A
(c) Both A and R are not correct
(d) A is not correct but R is correct
11
78 Identify ( mathrm{W}, mathrm{X}, mathrm{Y}, ) and ( mathrm{Z} ) respectively in the given reactions. ( boldsymbol{C a C O}_{3} stackrel{triangle}{rightarrow} boldsymbol{W}+boldsymbol{X} )
( boldsymbol{W}+boldsymbol{H}_{2} boldsymbol{O} rightarrow boldsymbol{Y} )
( boldsymbol{Y}+boldsymbol{Z} rightarrow boldsymbol{N} boldsymbol{a} boldsymbol{O} boldsymbol{H}+boldsymbol{C a C O}_{3} )
A. ( C a O, C O_{2}, C a C O_{3}, N a_{2} C O_{3} )
в. ( C O_{2}, ) Са( (O H)_{2}, C a(H C O)_{3}, N a H C O_{3} )
c. ( C a O, C O_{2}, C a(O H)_{2}, N a_{2} C O_{3} )
D. ( C O_{2}, C a O, H_{2} C O_{3}, N a_{2} C O_{3} )
11
79 In the mineral, barium ion can be identified by :
A. green colour in ame
B. yellow precipitate with ( C r O_{4}^{2-} ) solution
C. white precipitate with ( S O_{4}^{2} )
D. all of the above
11
80 The main oxides formed on combustion
of ( L i, N a ) and ( K ) in excess of air are
respectively:
A. ( L i O_{2}, N a_{2} O_{2} ) and ( K_{2} O )
в. ( L i_{2} O_{2}, N a_{2} O_{2} ) and ( K O_{2} )
c. ( L i_{2} O, N a_{2} O_{2} ) and ( K O_{2} )
D. ( L i_{2} O, N a_{2} O ) and ( K O_{2} )
11
81 Q. 35 Why are Beso, and MgSO, readily soluble in water while CaSO4, SrSO4
and BaSo, are insoluble?
11
82 Element A burns in nitrogen to give an ionic compound B. Compound B reacts with water to give ( C ) and ( D ). A solution of C becomes milky on bubbling carbon dioxide. Identify ( A, B, C ) and ( D: )
A ( cdot A=N a ; B=N a_{3} N_{2} ; C=N a(O H)_{2} ; D=N H_{3} )
B. ( A=K ; B=K_{3} N_{2} ; C=K O H ; D=N H_{3} )
C. ( A=C a ; B=C a_{3} N_{2} ; C=C a(O H)_{2} ; D=N H_{3} )
D. ( A=B a ; B=B a_{3} N_{2} ; C=B a(O H)_{2} ; D=N H_{3} )
11
83 Among ( K O_{2}, A l O_{2}^{-}, B a O_{2} ) and ( N O_{2}^{+} )
unpaired electron is present in:
11
84 Which of the following statements are
true about the alkali metals?
This question has multiple correct options
A. All alkali-metal salts impart a characteristic colour to the Bunsen flame.
B. Among LiOH, CsOH, KOH, and RbOH, CsOH has the highest solubility in water.
C. Among the alkali metals, cesium is the most reactive.
D. The reducing character of the alkali metal hydrides follow the order: ( L i H>N a H>K H>R b H>C s H )
11
85 In the reaction ( M+O_{2} longrightarrow M O_{2} )
(super oxide) the metal is :
A ( . L i )
в. ( N a )
( c . K )
D. ( B a )
11
86 Q Type your question
( mathbf{A} cdot 2 C H_{3} C O O H+N a_{2} C O_{3} rightarrow 2 C H_{3} C O O N a+H_{2} O+ )
( C O_{2} ) (Test tube ( B ) )
( left.C a(O H)_{2}+C O_{2} rightarrow C a C O_{3}+H_{2} O text { (Test tube } Aright) )
B ( cdot 2 C H_{3} C O O H+N a_{2} C O_{3} rightarrow 2 C H_{3} C O O N a+H_{2} O+ )
( C O_{2}(text { Test tube } A) )
( left.C a(O H)_{2}+C O_{2} rightarrow C a C O_{3}+H_{2} O text { (Test tube } Bright) )
( mathbf{c} cdot C H_{3} C O O H+N a_{2} C O_{3} rightarrow C H_{3} C O O N a+H_{2} O+ )
( C O_{2}(text { Test tube } A) )
( left.C a(O H)_{2}+C O_{2} rightarrow C a C O_{3}+H_{2} text { (Test tube } Bright) )
D ( cdot 2 C H_{3} C O O H+N a_{2} C O_{3} rightarrow 2 C H_{3} C O O N a+H_{2} O+ )
( C O text { (Test tube } A) )
( left.mathrm{Ca}(mathrm{OH})_{2}+mathrm{CO}_{2} rightarrow mathrm{CaCO}_{3}+mathrm{H}_{2} mathrm{O} text { (Test tube } Bright) )
11
87 Which of the following metals form just one kind of oxide?
This question has multiple correct options
A. Sodium
B. Rubidium
c. caesium
D. Potassium
11
88 Solutions of alkali metals in liquid
ammonia at ( -33^{circ} mathrm{C} ) conduct electricity
without chemical reaction at the
electrodes. Hence, conductivity should :
A. increase as temperature is lowered
B. decrease as temperature is lowered
c. remain constant on changing the temperature
D. there is always interaction of alkali metal with liquid ammonia
11
89 The decreasing order of hydration
enthalpies earth metal ions is:
( mathbf{A} cdot B e^{2+}>B a^{2+}>C a^{2+}>S r^{2+} )
B ( cdot B a^{2+}>S r^{2+}>C a^{2+}>M g^{2+}>B e^{2+} )
( mathbf{C} cdot B e^{2+}>C a^{2+}>M g^{2+}>B e^{2+} )
D ( cdot B e^{2+}>M g^{2+}>C a^{2+}>S r^{2+}>B a^{2+} )
11
90 Which one of the following products is formed when a mixture of steam,
sulphur dioxide gas and oxygen gas (from air) is passed over dry lumps of common salt, the sodium chloride?
A. ( N a_{2} S O_{3} )
в. ( C l_{3} )
( mathbf{c} cdot operatorname{NaH} S O_{3} )
D. ( N a_{2} S O_{4} )
11
91 The temporary hardness of water due to calcium bicarbonate can be removed by
adding:
A. ( C a C O_{3} )
в. ( C a(O H)_{2} )
c. ( C a C l_{2} )
D. ( H C l )
11
92 The common ingredient required for making cement and glass is:
A. washing soda
B. baking soda
c. limestone
D. potash
11
93 Q4. The hydroxides and carbonates of sodium and potassium are easily soluble in water while the
corresponding salts of magnesium and calcium are sparingly soluble in water. Explain.
11
94 Which anion is stable towards water:
( A cdot O^{2} )
в. ( O_{2}^{2} )
( c cdot O_{2} )
D. None of these
11
95 Compare and contrast the chemistry of group 1 metals with that of group 2 metals with respect to the following:
Polarizing power of cations increases on
going from group 1 to group 2.
11
96 Beryllium forms hydrate peroxide,
( B e O_{2} cdot H_{2} O )
A. True
B. False
11
97 The correct order regarding the
solubility of alkaline earth metal halides in water is :
A ( cdot B e C l_{2}<M g C l_{2}<C a C l_{2}<S r C l_{2}<B a C l_{2} )
в. ( M g C l_{2}B e C l_{2}>B a C l_{2}>S r C l_{2} )
C. ( B a C l_{2}>M g C l_{2}>C a C l_{2}>B e C l_{2}>S r C l_{2} )
D. ( B e C l_{2}>M g C l_{2}>C a C l_{2}>S r C l_{2}>B a C l_{2} )
11
98 Which of the following statements is
true about ( boldsymbol{C a}(boldsymbol{O H})_{2} ? )
A. It is used in the preparation of bleaching powder
B. It is light blue solid
c. It does not process disinfectant property
D. It is used in the manufacture of cement
11
99 ‘The enthalpy of hydration decreases in
( operatorname{going} ) from ( L i^{+} ) to ( C s^{+} )
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
100 Among the following the least thermally stable is:
A. ( K_{2} C O_{3} )
B. ( N a_{2} C O_{3} )
( mathrm{c} . B a C O_{3} )
D. ( L i_{2} C O_{3} )
11
101 When baking soda reacts with vinegar, is formed.
A. sodium carbonate
B. sodium hydrogen carbonate
c. sodium acetate
D. none of above
11
102 A milkman adds a very small amount of baking soda to fresh milk. The pH will :
A. increase
B. decrease
c. same as milk
D. none of these
11
103 Q. 14 Dead burnt plaster is
(a) CaSO4
(b) C
(c) CaSO4 H20
(d) CaSO4-2H,0
11
104 Which substance when used with
butter having butyric acid can cure
acidity?
A . lime water
B. Soda water
c. calcium carbonate
D. lime juice
11
105 Answer the questions based on the
following flow-sheet.
Following are some statements about
species ( C )
Select correct statement(s).
This question has multiple correct options
( mathbf{A} cdot mathrm{C} ) is ( N H_{4} C l )
B. ( mathrm{C} ) is ( mathrm{NaHCO}_{3} )
C ( cdot mathrm{C} ) is recycled into ( mathrm{Ca}(mathrm{OH})_{2} ) chamber to from ( mathrm{NH}_{3} )
( D cdot mathrm{C} ) is ( N a_{2} C O_{3} )
11
106 Assertion
Ca ( F_{2} ) has been given the name
fluorspar.
Reason
Solid ( C a F_{2} ) emits light when heated.
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
107 ation of hydrates of haboes of calciu, baru and strontium
26,0, B2, -2H-0. STOL-2H,0, can be achieved by heating.
These become wet on keeping in air. Which of the following statements
is correct about these habides?
Actas dehydrating agent
Can absorb moisture from a
Tendency to form bydrae decreases from calcium to barium
d. All of the above
11
108 The alkali metal which acts as a
nutrient for plants is:
A. ( N a )
в. ( K )
( c cdot L i )
D. ( R b )
11
109 Q. 15 Suspension of slaked lime in water is known as
(a) lime water
(b) quick lime
(c) milk of lime
(d) aqueous solution of slaked lime
11
110 Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
( A cdot S r S O_{4} )
в. ( mathrm{CaSO}_{4} )
c. ( B e S O_{4} )
D. ( B a S O_{4} )
11
111 Q18. Describe two important uses of each of the following:
(i) caustic soda (ii) sodium carbonate (iii) quick lime
11
112 Assertion
The mobilities of the alkali metal ions
in aqueous solutions are: ( boldsymbol{L} boldsymbol{i}^{+}< )
( boldsymbol{N} boldsymbol{a}^{+}<boldsymbol{K}^{+}<boldsymbol{R} boldsymbol{b}^{+}<boldsymbol{C} boldsymbol{s}^{+} )
Reason
Greater the charge, smaller the radius, larger the hydration and thus heavier (hydrated) ion slower.
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
113 Statement : Baking soda or baking powder is different.
Answer whether the above statement is
true or false.
A. True
B. False
11
114 Raw materials used for the
manufacture of Portland cement are:
A. gypsum and limestone
B. limestone and clay
c. alumina, clay and gypsum
D. gypsum and clay
11
115 0.19 Which of the following statements is true about Ca(OH)2?
(a) It is used in the preparation of bleaching powder
(b) It is a light blue solid
(c) It does not possess disinfectant property
(d) It is used in the manufacture of cement NWOO D
biduude
11
116 The anhydrous calcium sulphate is called :
A. gypsum
B. anhydrite
c. plaster of Paris
D. lime
11
117 Itching causing ( _{-}-_{-}-_{-}- ) crystals are found in colocasia leaves.
A. calcium carbonate
B. calcium oxalate
c. calcium sulphate
D. calcium chloride
11
118 The formulae of oxides formed when
barium burns in presence of oxygen are:
A. ( B a_{2} O, B a O )
в. ( B a O, B a O_{2} )
с. ( B a O, B a_{2} O_{2} )
D. ( B a_{2} O, B a O_{2} )
11
119 Explain how does the melting point change on moving from group- 1 to group- 2 in the periodic table? 11
120 Quicklime is a chemical compound
known as calcium oxide ( boldsymbol{C a}(boldsymbol{O} boldsymbol{H})_{2} )
If true enter 1 ,if false enter 0
( A cdot O )
11
121 Q. 50 When water is added to compound (A) of calcium, solution of compound
(B) is formed. When carbon dioxide is passed into the solution, it turns
milky due to the formation of compound (C). If excess of carbon dioxide
is passed into the solution milkiness disappears due to the formation of
compound (D). Identify the compounds A, B, C and D. Explain why the
milkiness disappears in the last step.
tie
ad
indicates that
11
122 Assertion
The stability of peroxides and
superoxides increases in passing from
Li to CS.
Reason
The electropositive character of the
elements in the periodic table increases
on moving down a group.
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
123 What happen when ( N a O H ) reacts
with?
( N H_{4} C l )
( N H_{4} N O_{3} )
( left(N H_{4}right)_{2} S O_{2} )
Urea
11
124 Which of the following element(s) is/are not react directly with nitrogen to form nitride ?
This question has multiple correct options
A . Na
B. Li
( c cdot k )
D. Rb
11
125 V.4 Metal carbonates decompose on heating to give metal oxide and carbon
dioxide. Which of the metal carbonates is most stable thermally?
(a) MgCO, (b) Caco, (c) SrCog (d) BaCO3
11
126 The highly water soluble alkaline earth
metal fluoride is:
A. ( C a F_{2} )
в. ( B a F_{2} )
c. ( M g F_{2} )
D. ( B e F_{2} )
11
127 Among the following which can form ions with a ( 2+ ) charge?
A . Alkali metal
B. Alkaline earth metal
c. Transition metal
D. Halogen
E. Noble gas
11
128 NaOH can also be prepared by electrolysis of aqueous NaCl. Amount of NaOH formed when 0.445 L of ( mathrm{NaCl} ) (aq) is electrolysed for 137 s with a current of
( 1.08 A, ) is :
A . ( 0.09 g )
B. ( 0.12 g )
c. ( 0.06 g )
D. amount of NaCl has not been given
11
129 Explain, why electronegativity of Li is greater than Mg? 11
130 What is the chemical formula of plaster
of paris?
11
131 Quicklime is made by heating
limestone. Which equation represents this reaction?
A ( cdot C a C O_{3} rightarrow C a+O_{2}+C O )
в. ( C a C O_{3} rightarrow C a O+C O_{2} )
( mathrm{c} cdot mathrm{CaCO}_{3}+mathrm{H}_{2} mathrm{O} rightarrow mathrm{CaO}+mathrm{H}_{2} mathrm{CO}_{3} )
D. ( C a C O_{3}+H_{2} O rightarrow C a(O H)_{2}+C O_{2} )
11
132 Which of the following is a false
statement?
A. Sodium oxide is more basic then magnesium oxide
B. Beryllium oxide is amphoteric.
C. The thermal stability of beryllium carbonate is more than that of calcium carbonate
D. Lithium chloride is deliquescent.
11
133 Compare hydration energy of ( B e^{2+} ) and
( boldsymbol{A} boldsymbol{l}^{3+} )
11
134 The correct sequence of thermal
stability of the following carbonates is:
A. ( B a C O_{3}<C a C O_{3}<S r C O_{3}<M g C O_{3} )
в. ( M g C O_{3}<C a C O_{3}<S r C O_{3}<B a C O_{3} )
c. ( B a C O_{3}<S r C O_{3}<C a C O_{3}<M g C O_{3} )
D. ( M g C O_{3}<S r C O_{3}<C a C O_{3}<B a C O_{3} )
11
135 An alkaline earth metal:
A . potassium
B. calcium
c. lead
D. copper
11
136 ( x )
Liquid sodium ( quad ) Breathing apparatus metal ( quad ) submarine
Potassium ( quad ) Explosive
Potassium nitrate Coolant in nuclear reaction
Potassium
superoxide Soft soap
Match the compounds/metal in(X) with
their used in (Y). hence correct order is.
A . A-l, B-III, C-II, D-IV
B. A-III, B-IV, C-II, D-I
C . A-II, B-I, C-III, D-IV
D. A-IV, B-II, C-III, D-1
11
137 The discomfort caused by indigestion
due to over-eating can be cured by taking:
A. vinegar
B. lemonjuice
c. baking soda
D. caustic soda
11
138 Assertion
NaCl is precipitated when ( H C l ) gas is
passed in a saturated solution of ( N a C l )
Reason
HCl is a strong acid.
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
139 C. 43 Match the elements given in Column I with the colour they impart to the
flame given in Column II.
Column 1
Column II
A Cs
1. Apple green
B. Na
2. Violet
CK
3. Brick red
D. Ca
4. Yellow
E SE
5. Crimson red
E. Ва
6. Blue
11
140 A solid compound ( X ) on heating give
( C O_{2} ) gas and a residue. The residue
mixed with water forms ( Y . ) On passing
an excess of ( C O_{2} ) through ( Y ) in water a
clear solution ( Z ) is obtained. On boiling
( Z, ) compound ( X ) is reformed. The
compound ( boldsymbol{X} ) is:
A ( cdot operatorname{Ca}left(mathrm{HCO}_{3}right)_{2} )
в. ( C a C O_{3} )
( mathbf{c} cdot N a_{2} C O_{3} )
D. ( K_{2} C O_{3} )
11
141 Increasing order of stability of
I. ( boldsymbol{K}_{mathbf{2}} boldsymbol{C} boldsymbol{O}_{boldsymbol{3}} )
Il. ( boldsymbol{M} boldsymbol{g} boldsymbol{C} boldsymbol{O}_{3} )
( | N a_{2} C O_{3} )
( A )
B. II
c. ॥
D.
11
142 Q9. Arrange the following in the increasing order of solubility in water.
MgCl, CaCl, SrCl, BaCl2
11
143 The first ionisation energy of Be is
smaller than that of B while the second
ionisation energy of Be is higher than
that of B.

Answer whether the above statement is
true or false.
If true enter 1 , else enter 0

11
144 Identify the following substances which are underlined:

An alkaline gas which produces dense white fumes when reacted with hydrogen chloride gas.

11
145 The molecular formula of Baking soda
is:
A. ( N a H C O_{3} )
в. ( N a H C O_{3} .6 H_{2} O )
( mathbf{c} cdot N a_{2} C O_{3} )
D. ( N a_{2} C O_{3} .10 H_{2} O )
11
146 22. Chemical ‘A’ is used for water softening to remove
temporary hardness. A reacts with sodium carbonate to
generate caustic soda. When CO, is bubbled through a
solution of ‘A’, it turns cloudy. What is the chemical
formula of A?
(a) CaO
(b) Ca(OH),
(c) CaCO3
(d) Ca(HCO3)2
11
147 What happens when? Sodium acilate react with soda lime? 11
148 Q15. What do you mean by diagonal relationship in periodic table? 11
149 Hydrogen reacts with a metal(A) to give an ionic hydride(B). The metal (A) gives a brick red color with bunsen flame. The
hydride formed is commonly known by its trade name. The compound (B) on
treating with water gives back ( mathrm{H}_{2} ) and
(C). Identify the metal ( A )
( A cdot K )
B. Na a
c. мg
D. ca
11
150 Consider the following reaction:
( boldsymbol{M}+boldsymbol{O}_{2} rightarrow boldsymbol{M} boldsymbol{O}_{2} )
( M ) is an alkali metal
( M O_{2} ) is a stable superoxide
A. ( M ) can not be ( L i ) and ( N a )
B. ( M ) can not be ( C s ) and ( R b )
c. ( M ) can not be ( L i ) and ( R b )
D. None of these
11
151 How is calcium oxide prepared?
A. Thermal decomposition of ( C a C O_{3} )
B. Oxidation of ( C a C O_{3} )
c. Reduction of ( C a C O_{3} )
D. None of these
11
152 How chlorine react with Cold and dilute
NaoH?
11
153 48. What is the chemical name of the
common salt?
(1) Calcium Carbonate
(2) Sodium Carbonate
(3) Sodium Chloride
(4) None of these
11
154 Which of the following is/are incorrect
about solubility trend in group I and II ?
This question has multiple correct options
A. The solubility of the alkali metal fluorides increases on moving down the group.
B. The solubility of the alkali metal hydroxides decreases on moving down the group.
C. The solubility of hydroxides, fluorides and oxalates decreases from calcium to barium
D. The solubility of carbonates, sulphates and chromates decreases on moving down the group.
11
155 Calcium imide on hydrolysis gives a gas ( B, ) which on oxidation by bleaching powder gives a gas ( C . ) Gas ( C ) on reaction with magnesium gives a compound ( D ), which on hydrolysis again gives a gas ( B ). Hence, ( B, C ) and ( D ) are respectively:
A ( cdot N H_{3}, N_{2}, M g_{3} N_{2} )
в. ( N_{2}, N H_{3}, M g N H )
c. ( N_{2}, N_{2} O_{5}, M gleft(N O_{3}right)_{2} )
D. ( N H_{3}, N O_{2}, M gleft(N O_{2}right)_{2} )
11
156 Choose the incorrect statement.
( mathbf{A} cdot B e C O_{3} ) is kept in the atmosphere of ( C O_{2}, ) since it is least thermally stable.
B. ( B e ) dissolves in alkali forming ( left[B e(O H)_{4}right]^{2-} )
C ( . B e F_{2} ) forms complex ion with ( N a F ) in which ( B e ) goes with cation.
D. ( B e F_{2} ) forms complex ion with ( N a F ) in which ( B e ) goes
with anion.
11
157 The main raw materials required for the manufacture of portland cement are:
A. limestone and clay
B. limestone and gpsum
c. limestone and calcium chloride
D. limestone and silica
11
158 The lightest metal among the following is:
A . cs
B. Be
c. Na
D. Li
11
159 51 Lithium hydride can be used to prepare other useful hydrides. Beryllium
hydride is one of them. Suggest a route for the preparation of beryllium
hydride starting from lithium hydride. Write chemical equations involved
in the process.
Ans Boll be
11
160 Assertion
( mathrm{CaCO}_{3} ) is prepared by passing carbon
dioxide gas through slaked lime.
Reason
Passing excess of ( C O_{2} ) through slaked lime leads to the formation of quick
lime.
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
161 The four general methods of extracting metals are thermal, decomposition, displacement of one element by another, chemical reduction and
electrolytic reduction. how are the group
metals obtained and why are the other methods unsuitable?
11
162 Which of the following is/are the raw materials used to manufacture
cement?

This question has multiple correct options
A. clay
B. Limestone
c. calcium sulphate
D. Slaked lime

11
163 Which salt can be used to identify coloured cation?
A. Borax
B. Microcosmic salt
c. Both (a) and (b)
D. None of these
11
164 Q Type your question
made to reaci with anute nul tads r is
evolved in the reaction which is made to
pass through the delivery tube into test
tube 2 having solution ( Z ) and a milky
solution is obtained What are ( X, Y ) and ( Z )
respectively?
A. ( N a O H, C O_{2}, N a_{2} C O_{3} )
в. ( operatorname{Ca}(O H)_{2}, H_{2}, C aleft(H C O_{3}right)_{2} )
c ( cdot operatorname{ca}(O H)_{2}, C O_{2}, C a C O_{3} )
D ( cdot ) ( _{C a} ) a ( C ) O ( _{3}, ) C ( O_{2}, C a(O H)_{2} )
11
165 Q12. Discuss the various reactions that occur in the Solvay process. 11
166 Statement-I: Alkali metals dissolve in
liquid ammonia to give blue solutions Statement-II: Alkali metals in liquid ammonia give solvated species of the
type ( left[Mleft(N H_{3}right)_{n}right]^{+}(M=text { alkali metals }) )
A. Statement-l is true; Statement-ll is true; Statement-I is the correct explanation for Statement-
B. Statement-l is true; Statement-ll is true; Statement-1 is not the correct explanation for statement-
c. Statement-l is true; Statement-ll is false
D. Statement-I is false; Statement-II is true
11
167 un treatment wırn cola water, an
element (A) reacts readily liberating a
colorless, odourless gas ( (mathrm{B}) ) and ( mathrm{a} ) solution (C). Lithium is reacted with (B)
yielding a solid product (D) which effervescence with water to give a
strongly basic solution (E). When ( C O_{2} )
gas is bubbled through the solution ( (mathrm{C}) ) a white ppt (F) is formed but this
redissolved forming solution (G) when
more ( C O_{2} ) is passed. The precipitate ( (F) )
effervesced when moistened with conc.
( H C l ) and give deep red coloration to the
Bunsen burner flame. (F) on heating
with an excess of carbon at ( 2000^{circ} C )
give (H).

Solid (H) on hydrolysis gives a gas, which on passing through ammonical
( A g N O_{3} ) solution, yields:
A. white ppt
B. red ppt
C. no ppt
D. brown ppt

11
168 Table salt becomes sticky on exposure during the rainy season. Explain. 11
169 In the reaction : ( boldsymbol{K}_{mathbf{4}}left[boldsymbol{F} boldsymbol{e}(boldsymbol{C} boldsymbol{N})_{boldsymbol{6}}right]+ )
( K_{2} C O_{3} rightarrow ) the product formed is :
A ( . F e C O_{3} )
в. ( K C N )
c. ( K F e C O_{3} )
D. ( K_{3}left[F e(C N)_{6}right] )
11
170 Among of alkali metals, the metal with highest ionization potential is :
A. ( L )
B. Na a
( c cdot k )
D. Rb
11
171 Superoxides of alkali metals act as
oxidising agents while normal oxides are basic in nature. The oxide which is
paramagnetic in nature due to presence of unpaired electron is :
A. ( N a_{2} O_{2} )
в. ( K O_{2} )
( mathbf{c} cdot N a_{2} O )
D. ( K_{2} O_{2} )
11
172 Some substances are commonly used
for removing acidic gases. Which of the following is commonly used in the chemical industry for the removal of hydrogen sulphide from coal gas?
A. Milk of magnesia
B. Slaked lime
c. Quick lime
D. Sodium hydride
11
173 When lime is added to water
it reacts vigorously to form slaked lime.
11
174 A metal ( X ) on heating in nitrogen gas gives a compound ( Y . ) Compound ( Y )
on treatment with ( H_{2} O ) gives a colourless gas which when passed
through ( C u S O_{4} ) solution gives a blue colour. Then, compound ( Y ) is:
A ( . M gleft(N O_{3}right)_{2} )
в. ( M g_{3} N_{2} )
c. ( N H_{3} )
D. ( M g O )
11
175 Sodium bicarbonate solution has ( boldsymbol{p} boldsymbol{H} )
less than 7 .
State True or False:
A. True
B. False
c. cannot be determined
D. None of the above
11
176 Name the three metals which react with
cold water to form hydrogen gas. Support your answer with equally balanced chemical equations.
11
177 ” ( K_{2} O ) is paramagnetic while
( K O_{2} a n d K_{2} O_{2} ) are diamagnetic.”
Answer whether the above statement is
true or false. If true enter 1 , else 0
11
178 Q2. Why alkali and alkaline earth metals cannot be obtained by chemical reduction method?
Ans. Because Ilceli
111 1
11
179 Which of the following reactions is not a part of Solvay’s process for preparation of sodium carbonate?
( mathbf{A} cdot 2 N H_{3}+H_{2} O+C O_{2} rightarrowleft(N H_{4}right)_{2} C O_{3} )
B. ( left(N H_{4}right)_{2} C O_{3}+H_{2} O+C O_{2} rightarrow 2 N H_{4} H C O_{3} )
c. ( 2 N H_{4} H C O_{3} rightarrowleft(N H_{4}right)_{2} C O_{3}+H_{2} O+C O_{2} )
D. ( N H_{4} H C O_{3}+N a C l rightarrow N H_{4} C l+N a H C O_{3} )
11
180 Amphoteric hydroxides react with both alkalies and acids.Which of the
following group 2 metal hydroxides is soluble in sodium hydroxide?
( mathbf{A} cdot B e(O H)_{2} )
в. ( R a(O H)_{2} )
( mathbf{c} cdot C a(O H)_{2} )
D. ( B a(O H)_{2} )
11
181 ( C O_{2} ) gas along with solid ( (Y) ) is obtained when sodium salt ( (X) ) is
heated. ( (X) ) is again obtained when
( C O_{2} ) gas is passed into aqueous solution of ( (boldsymbol{Y}) cdot(boldsymbol{X}) ) and ( (boldsymbol{Y}) )
respectively are:
A ( . N a_{2} C O_{3} ) and ( N a_{2} O )
в. ( N a_{2} C O_{3} ) and ( N a O H )
c. ( N a H C O_{3} ) and ( N a_{2} C O_{3} )
D. ( N a_{2} C O_{3} ) and ( N a H C O_{3} )
11
182 Suboxide of Rb has the formula:
( mathbf{A} cdot R b O_{2} )
в. ( R b O_{3} )
( mathrm{c} cdot R b_{2} O_{2} )
D. ( R b_{6} O )
11
183 Manufacture of which of the following does not require limestone as a raw
material?
A . Quick lime
B. Baking soda
c. Glass
D. Plaster of Paris
11
184 “Carnallite is ( K C l cdot M g C l_{2} cdot 6 H_{2} O )
If true enter 1 , if false enter 0
11
185 The correct order of covalent nature is:
A. ( B e C l_{2}> ) LiCl
в. ( B e C l_{2}<L i C l )
c. ( B e C l_{2}=L i C l )
D. None of these
11
186 Lattice energy (numerical value) of choride of alkali metals is in order:
A . LiCI > NaCI>KCI> RbCI> Cscl
B. LiCI<NaCI<KCI<RbCI<CsCI
C. NaCI<KCI <LiCI <RbCI <CsC
D. NaCI<KCI<RbCI<CsCI<Lic
11
187 On dissolving moderate amount of sodium metal in liquid ammonia at low
temperature, which of the following
does not occur?
A. Blue coloured solution is obtained
B. Sodium ions are formed in solution
C. Liquid ammonia becomes a good conductor of electricity
D. Liquid ammonia remains diamagnetic.
11
188 Sodium hydroxide is manufacture by the electrolysis of brine solution. The
reaction by-products are:
A. ( C l_{2} ) and ( H_{2} )
B. ( C l_{2} ) and ( mathrm{Na}-mathrm{Hg} )
c. ( C l_{2} ) and ( mathrm{NaC} )
D. ( C l_{2} ) and ( O_{2} )
11
189 Chlorine atom in ( N a C l ) gets a unit
negative charge:
A. its nucleus has 17 protons, 18 electrons
B. its nucleus has 18 protons, 17 electrons
c. its nucleus has 8 protons, 7 electrons
D. none of the above
11
190 In the caster-Kleiner cell used for the
manufacture of ( N a O H, ) the cathode in
the central compartment is made up of
A. carbon
B. iron
c. mercury
D. nickel
11
191 ( mathrm{CaCO}_{3} ) naturally exists in:
A. one crystal form
B. two crystal form
c. three crystal form
D. four crystal form
11
192 Which compound is missing in the reaction given below?
( 2 N a O H+left(N H_{4}right)_{2} S O_{4} rightarrow ?+N a_{2} S O )
A. ( O_{2} )
в. ( H_{2} )
c. ( N_{2} )
D. ( 2 N H_{3} )
11
193 Which of the following reactions is known as slaking of lime?
A ( cdot C a C O_{3} rightarrow C a O+C O_{2} )
в. ( C a O+2 H C l rightarrow C a C l_{2}+H_{2} O )
c. ( C a C O_{3}+H_{2} O rightarrow C a(O H)_{2}+C O_{2} )
D. ( C a O+H_{2} O rightarrow C a(O H)_{2} )
11
194 07. What is dead burnt plaster? 11
195 Effervescence is seen when a bottle of
soda water is opened
A. True
B. False
11
196 Which of the following illustrate the
anomalous properties of Lithium?
This question has multiple correct options
A. Lithium is softer than the other group I metals
B. Lithium forms nitride, ( L i_{3} N ) unlike other group
metals
C. The melting and boiling point of Lithium are comparatively high
D. none of these
11
197 Q. 37 In the Solvay process, can we obtain sodium carbonate directly by treating
the solution containing (NH4)2CO3 with sodium chloride? Explain.
11
198 Select the correct order of ionic
conductance of the following cations in
an aqueous solution.
A ( . L i^{+}<N a^{+}<K^{+}N a^{+}>K^{+}>R b^{+} )
c. ( L i^{+}K^{+}>R b^{+} )
D. ( L i^{+}=N a^{+}<K^{+}<R b^{+} )
11
199 Q17. What happens when (i) magnesium is burnt in air, (ii) Quick lime is heated with silica
(iii) chlorine reacts with slaked lime (iv) calcium nitrate is heated?
11
200 “Li metal is used in photoelectric cells, while Cs is not used.”

Answer whether the above statement is
true or false.
If true enter 1 , else enter 0

11
201 Arrange the following in increasing order of lattice energy:
( mathrm{NaF}, mathrm{NaCl}, mathrm{NaBr}, mathrm{Nal} )
A. ( N a I<N a B r<N a C l< ) NaF
в. ( N a F<N a C l<N a B r<N a I )
c. ( N a I<N a C l<B a B r<N a F )
D. None of these
11
202 Q1. Name the alkali metal which shows diagonal relationship with magnesium? 11
203 Which of the following forms the most basic hydroxide?
A. ( C u )
в. ( A l )
( c . N a )
D. ( Z ) n
11
204 In which of the following pair, both the substances are chemically same?
A. Milk of lime and lime water
B. Dead burnt plaster and gypsumm
C. Alumina and gypsum
D. Gypsum and Plaster of Paris
11
205 ( mathrm{Zn}+mathrm{NaOH} rightarrow ) 11
206 Which of the following will have the largest value of solubility product, or is most soluble in water?
A ( cdot operatorname{Be}(O H)_{2} )
в. ( B a(O H)_{2} )
c. ( operatorname{Ca}(O H)_{2} )
D. ( M g(O H)_{2} )
11
207 Give the missing product of the following reaction in same order of reaction order:
( boldsymbol{C a}+boldsymbol{a i r} rightarrow boldsymbol{C a O}+_{–}- )
( boldsymbol{C a} boldsymbol{C O}_{3}(boldsymbol{s}) stackrel{Delta}{longrightarrow} boldsymbol{C a O}(boldsymbol{s})+_{–} )
(2)
( boldsymbol{C a}(boldsymbol{O} boldsymbol{H})_{2} stackrel{text {calcination}}{longrightarrow} boldsymbol{C a O}+_{–} )
( ldots(3) )
A. ( C a_{3} N_{2} ; C O_{2} ; H_{2} O )
в. ( C a_{3} N_{2} ; C O_{2} ; H_{2} )
c. ( C a_{a} N_{2} ; operatorname{CO} ; H_{2} O )
D. ( C a F_{2} ; C O_{2} ; H_{2} O )
11
208 The pair of compounds which cannot exist together in aqueous solution is:
A. ( N a_{2} C O_{3} ) and ( N a H C O_{3} )
в. ( N a H C O_{3} ) and ( N a O H )
c. ( N a O H ) and ( N a H_{2} P O_{4} )
D. Both (B) and (C)
11
209 Recently, sodium naphthalenide
( left.C_{10} H_{8} N aright) ) has been used as reductant
in complex formation. ( C_{10} H_{8} N a ) is :
This question has multiple correct options
A. paramagnetic
B. deep-green in colour
c. diamagnetic
D. colourless
11
210 Which of the following compound is the final product of Solvay process?
A. Ammonium carbonate
B. Ammonium bicarbonate
c. sodium carbonate
D. Sodium bicarbonate
11
211 When sodium hydroxide solution is added to a freshly prepared solution of ferrous sulphate, a green precipitate of ferrous hydroxide is formed which on standing turns brown because:
A. ferric salts are unstable
B. the mixture becomes dirty
c. ferrous hydroxide becomes ferric oxide
D. green ferrous hydroxide oxidises to brown ferric hydroxide
11
212 The metal with which hydrogen reacts to form metal hydride is:
A. ( H g )
в. ( C a )
( c . A g )
D. ( H )
11
213 Why is common salt sometimes yellow instead of being pure white? 11
214 ( C aleft(H C O_{3}right)_{2} ) and ( C a(O H)_{2} ) cannot be stored in the same vessel.
If true enter 1 , else enter 0 .
11
215 Which of the following on thermal decomposition yields a basic as well as an acidic oxide?
A. ( N a N O_{3} )
в. ( K C l O_{3} )
( mathrm{c} cdot mathrm{CaCO}_{3} )
D. ( N H_{4} N O_{3} )
11
216 Assertion
Divalent compounds of alkaline earth metals are diamagnetic.
Reason
( M^{2+} ) ions of group 2 have noble gas conguration.
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
217 Which of the following is incorrect?
A. ( M g ) burns in air releasing dazzling light rich in ( U V )
rays
B. ( C a C l_{2} cdot 6 H_{2} O ) when mixed with ice gives freezing
mixture
c. ( M g ) cannot form complexes
D. ( B e ) can form complexes due to its very small size
11
218 The name of the process is :
[
begin{array}{l}
mathrm{caCO}_{3} longrightarrow mathrm{CaO}+mathrm{CO}_{2} \
mathrm{NH}_{3}+mathrm{H}_{2} mathrm{O}+mathrm{CO}_{2} stackrel{longrightarrow}{longrightarrow} mathrm{NH}_{4} mathrm{HCO}_{3} \
mathrm{NaCl}+mathrm{NH}_{4} mathrm{HCO}_{3} longrightarrow mathrm{NH}_{4} mathrm{Cl}+mathrm{NaHCO}_{3} \
2 mathrm{NH}_{4} mathrm{Cl}+mathrm{CaO} longrightarrow mathrm{CaC}_{2}+2 mathrm{NH}_{3}+mathrm{H}_{2} mathrm{O}
end{array}
]
A. solvay
B. lowing
c. salt cake
D. gossage
11
219 Give the chemical formula of calcium
sulphate hemihydrate.
A ( cdot operatorname{CaSO}_{4} cdot 2 mathrm{H}_{2} )
в. ( operatorname{caSO}_{4}: frac{1}{2} H_{2} mathrm{O} )
c. ( operatorname{cas} O_{4} cdot 10 H_{2} O )
D. ( operatorname{CaSO}_{4} . mathrm{H}_{2} mathrm{O} )
11
220 Compare ( L i ) and ( B e ) according to the
polarisation of cations:
A ( cdot L i^{+}B e^{2} )
c. ( L i^{+}=B e^{2+} )
D. None of these
11
221 ( mathbf{2} N boldsymbol{a} boldsymbol{O} boldsymbol{H}+boldsymbol{S} boldsymbol{O}_{2} rightarrow ? )
A ( cdot N a_{2} O+H_{2}+S O_{2} )
в. ( N a_{2} S O_{3}+H_{2} O )
c. ( N a_{2} S O_{3}+H_{2} )
D. ( N a_{2} O+H_{2}+O_{2} )
11
222 What are the products of the following reaction? ( boldsymbol{C a} boldsymbol{C O}_{3} stackrel{boldsymbol{Delta}}{longrightarrow} )
A. ( C O+C O_{2} )
в. ( C a O+C O )
c. ( C O_{2}+C a_{2} O )
D. ( C O_{2}+C a O )
11
223 Q. 11 In the synthesis of sodium carbonate, the recovery of ammonia is done by
treating NH4Cl with Ca(OH)2. The by-product obtained in this process is
(a) CaCl₂
(b) NaCl
(c) NaOH (d) NaHCO,
11
224 What is the action of ( C o_{2} ) on quick lime. 11
225 Which gas is released on the addition of dilute acid to calcium carbonate?
A ( . N_{2} )
в. ( C a O O )
( c cdot C l_{2} )
D. ( N O_{2} )
E ( . C O_{2} )
11
226 The compound having lowest melting point is:
A. Licl
в. ( C s C l )
c ( . R b C l )
D. KCl
11
227 Which of the following is the correct description of calcium oxide?
A. Very stable
B. Prepared by the process of calcination
c. Low affinity for water
D. Less efficient desiccant than silica gel
11
228 Among the carbonates of alkali metals which one has highest stability:
A. ( C s_{2} C O_{3} )
в. ( R b_{2} C O_{3} )
( mathrm{c} cdot K_{2} mathrm{CO}_{3} )
D. ( N a_{2} C O_{3} )
11
229 Sodium hydrogen carbonate is used in fire extinguisher.
A. True
B. False
11
230 Mortar is a mixture of:
A. lime and water
B. lime and sand
C. lime, sand and water
D. lime and cement
11
231 Which of the following can form a super oxide very easily?
A. Sodium
B. Potassium
c. caesium
D. Lithium
11
232 Q14. Why are alkali metals soft? 11
233 “LiI has greater solubility in water than
( boldsymbol{C} boldsymbol{s} boldsymbol{I} )
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
234 Which of the following reactions correctly represent(s) the preparation of
( M g C O_{3} ? )
This question has multiple correct options
( mathbf{A} cdot M gleft(H C O_{3}right)_{2} stackrel{text {heat}}{rightarrow} M g C O_{3}+H_{2} O+C O_{2} )
B. ( M gleft(H C O_{3}right)_{2}+M g O rightarrow 2 M g C O_{3}+H_{2} O )
( mathbf{c} cdot M g S O_{4}+2 N a H C O_{3} rightarrow M g C O_{3}+N a_{2} S O_{4}+ )
( H_{2} O+C O_{2} )
D. None of these
11
235 Which one of the following oxides is soluble in water?
A. zinc oxide
B. Calcium oxide
c. Ferric oxide
D. Ferrous oxide
11
236 Assertion
Fr burns in air forming ( boldsymbol{F} boldsymbol{r} boldsymbol{O}_{2} )
Reason
The larger alkali metal ions stabilities
( O_{2}(text { superoxide }) )
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
237 The option(s) with only amphoteric oxides is (are):
This question has multiple correct options
A. ( C r_{2} O_{3}, B e O, S n O, S n O_{2} )
в. ( C r_{2} O_{3}, C r O, S n O, P b O )
c. ( Z n O, A l_{2} O_{3}, P b O, P b O_{2} )
D. ( N O, B_{2} O_{3}, P b O, S n O_{2} )
11
238 Assertion
( F r C l O_{4}, F r_{2} P t C l_{6} ) are low solubility
compounds of ( boldsymbol{F r} )
Reason
( boldsymbol{F r} boldsymbol{C l O}_{4}, boldsymbol{F r}_{2} boldsymbol{P t C l}_{6} ) have larger alkali
metal 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
239 Which of the following property(ies) of all the alkali metals increase(s) with
increase in their atomic number?
This question has multiple correct options
A. Solubility of their hydroxides
B. Thermal stability of their carbonates
c. softness
D. Hydration energy
11
240 Sodium on heating with moist air produces:
A. ( N a O )
в. маОН
c. ( N a_{2} O )
D. ( N a_{2} C O_{3} )
11
241 Read the given statements and select
the correct option:

Statement 1:Backing soda does not
taste sour.

Statement 2 :Bases are sour in taste
while acids are bitter in taste.
A. Both statements 1 and 2 are true statement 2 is correct explanation of statement 1.
B. Both statements 1 and 2 are true both statement 2 is not the correct explanation of statement 1
c. statements 1 is true and statement 2 is false
D. Both statements 1 and 2 are false

11
242 Which of the following is best ( C O_{2} )
absorber as well as a source of ( O_{2} ) in the
space capsule?
A ( . K O_{2} )
в. ( K_{2} O_{2} )
c. КОН
D. ( L i O H )
11
243 Q6. Compare the alkali metals and alkaline earth metals with respect to (i) ionization enthalpy, (ii)
basicity of oxides, (iii) solubility of hydroxides.
11
244 Property of all the alkaline earth metals
that increases with their atomic
number is:
A. solubility of their carbonates
B. thermal stability of their sulphates
c. ionisation energy
D. electronegativity
11
245 What is ( X ) in the equation? ( boldsymbol{C a O}+boldsymbol{3 C} rightarrow boldsymbol{X}+boldsymbol{C O} )
A ( cdot C a C O_{3} )
в. ( C a C_{2} )
( c cdot C O_{2} )
D. None of these
11
246 (a) Describe how the following properties vary on descending group IA and IIA (alkali and alkaline earth
metals) and state how these properties differ between the two groups?
(i) ( (I E)_{1} a n d(I E)_{2} )
(ii) cationic radii
(iii) rates of reaction with cold water
(b) For the same s-block elements,
discuss:
(i) the action of heat on their nitrates
(ii) the crystal structures of their chlorides, XY type only.
11
247 Which of the following metals dissolves in ( K O H ) with the evolution of
hydrogen?
A. ( C a )
в. ( M g )
( c cdot S r )
D. ( B e )
11
248 Q9. Why are potassium and caesium, rather than lithium used in photoelectric cells? 11
249 State True or False.
Molten Potassium burns in air forming potassium superoxide
A. True
B. False
11
250 If sodium chloride is added to silver
nitrate solution:
a. Which precipitate is formed?
b. Name the type of reaction.
c. Write the chemical equation.
11
251 The number of covalent bonds formed
by Be is:
11
252 Q. 28 Which of the following are the correct reasons for anomalous behaviour
of lithium?
(a) Exceptionally small size of its atom
(b) Its high polarising power
(c) It has high degree of hydration
(d) Exceptionally low ionisation enthalpy H
O TO
11
253 State True or False.
Setting of cement is an endothermic
process
A. True
B. False
11
254 State True or False.
Calcium bicarbonate is known in solid
state.
A. True
B. False
11
255 The hydration energy of ( M g^{2+} ) is greater than that of :
A ( . A l^{3} )
В. ( N a^{+} )
( c cdot B e^{2} )
D. ( M g^{3+} )
11
256 Which among the following compounds in crystalline form is used for making Nicol’s prism?
A ( cdot operatorname{CaSO}_{4} )
В. ( N a_{2} A l F_{6} )
( mathrm{c} cdot mathrm{CaCO}_{3} )
D. ( A l_{2} O_{3} )
11
257 NaOH cannot be stored in the vessel
made of ( Z n ) or ( A l ) or ( B e ).

Answer whether the above statement is
true or false.
A . True
B. False
c. Cannot be determined
D. None of the above

11
258 Lattice energy of alkali metal chlorides is in order:
( boldsymbol{L i C l}>boldsymbol{N a C l}>boldsymbol{K C l}>boldsymbol{R b C l}> )
( boldsymbol{C} boldsymbol{s} boldsymbol{C l} )
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
259 Gypsum is added to cement in order to:
A. prolong hydration
B. increase strength after hydration
c. decrease heat of hydration
D. reduce curing time
11
260 Cake does not taste bitter due to
presence of
A. sodium carbonate
B. tartaric acid
c. citric acid
D. sodium bicarbonate
11
261 Assertion
Alkaline earth metal oxides are quite
stable to heat.
Reason
Enthalpies of formation of alkaline
earth metal oxides are quite high.
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
262 The alkali metals dissolve in liquid
( N H_{3}, ) it is found that:
A. the dilute solution is blue but the color changes to bronze with increasing concentration
B. the blue color is due to presence of solvated electrons
c. the blue solutions are paramagnetic but the bronze colored solutions are diamagnetic
D. all the facts given above are found
11
263 The insecticide chlordane is warmed
with dilute NaOH solution for some
time. The no. of NaOH consumed:
11
264 The number of molecules of water of
crystallisation present in washing soda crystals is:
A . five
B. two
( c . ) ten
D. seven
11
265 Unreacted sodium metal can be
removed from liquid ammonia safely by
A. distilling the mixture
B. adding oil and then heating to convert ammonia to gas
c. adding ammonium chloride
D. none of the above
11
266 The property of the alkaline earth
metals which increases with their
atomic number is:
A. ionisation energy
B. electronegativity
c. solubility of their hydroxides in water
D. solubility of their sulphates in water
11
267 Q13. What is the general name for elements of group 1?
111.
11
268 30. Brine refers to :
(1) Salt water
(2) Sweet water
(3) Pure water
(4) Starch water
11
269 Assertion
( M g ) get oxidized, when heated in ( C O_{2} )
atmosphere.
Reason
( M g ) has strong affinity to oxygen.
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
270 Calculate the total number of protons in
10 gms of Calcium Carbonate ( left(C a C O_{3}right) )
11
271 “Of the alkali metal carbonates, only
( L i_{2} C O_{3} ) decomposes to give ( C O_{2} ) and
metal oxide.”

Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .

11
272 For the manufacture of cement various
steps are given below. Arrange the steps in a proper sequence.
(a) Clinker formation
Crushing
(c) Addition of gypsum Mixing of raw materials
(e) Grinding to fine powder Calcination in rotary kiln
( A cdot d b f a c e )
B. ( b d f ) c e a
c. ( d c ) a fe ( b )
D. a b c de f
11
273 The chemical formula of ( X, Y ) and ( Z )
are:
[
begin{array}{l}
mathrm{X}+mathrm{Na}_{2} mathrm{CO}_{3} longrightarrow mathrm{Y}+mathrm{Z} \
mathrm{CO}_{2}
end{array}
]
( Z(text { milky cloud }) )
( mathbf{A} cdot C a O, C a(O H)_{2}, N a O H )
B. ( N a O H, C a O, C a C O_{3} )
( mathbf{c} cdot N a O H, C a(O H)_{2}, C a C O_{3} )
D. ( C a(O H)_{2}, N a O H, C a C O_{3} )
11
274 The colour of caustic soda turns pink when phenolphthalein is added.
A. True
B. False
11
275 Q29. How would you explain the following observations?
(1) BeO is almost insoluble but Beso, is soluble in water
(ii) BaO is soluble but Baso, is insoluble in water.
(iii) Lil is more soluble than KI in ethanol.
11
276 Q21. Describe the importance of the following:
(1) Limestone (ii) Cement (iii) Plaster of Paris.
Ang TT
11
277 Rocksalt is:
A. ( K C l )
в. ( C a C l_{2} )
c. ( M g C l_{2} )
D. ( N a C l )
11
278 When sample of baking soda is strongly ignited in crucible it suffered loss in
weight of ( 3.1 g ) the mass of baking soda
is-
A. ( 16.8 g )
в. ( 8.4 g )
c. ( 11.6 g )
D. ( 4.2 g )
11
279 Which one of the following reactions is not associated with the Solvay process of manufacture of sodium carbonate?
A ( . ) NaCl ( +N H_{4} C O_{3} rightarrow N a H C O_{3}+N H_{4} C l )
в. 2 NaOH ( +C O_{2} rightarrow ) Na( _{2} ) CO ( _{3}+H_{2} ) O
c. ( 2 N a H C O_{3} rightarrow N a_{2} C O_{3}+H_{2} O+C O_{2} )
D. ( N H_{3}+H_{2} C O_{3} rightarrow N H_{4} H C O_{3} )
11
280 Which of the following is incorrect
statement?
A. The heats of hydration of the dipositive alkaline earth metal ions decrease with an increase in their ionic size
B. ( N a N O_{3} ) forms ( N a_{2} O ) on heating
C. Hydration energy of alkali metal ion is less than that of II ( A )
D. Alkaline earth metal ions, because of their much large charge to size ratio, exert a much stronger electrostatic attraction on the oxygen of water molecule surrounding them
11
281 Be and Al show diagonal relationship
and thus:
This question has multiple correct options
A. their oxides are soluble in alkali solution forming ( left[operatorname{Be}(O H)_{4}right]^{3-} )
B. they form complex anion ( B e F_{4}^{2-} ) and ( A l F_{6}^{3-} )
C ( cdot B e C l_{2} ) and ( A l C l_{3} ) are Lewis acid
D. oxides are basic
11
282 Which of the following constitute
sodium chloride crystal?
A. Sodium and chlorine atoms
B. ( N a C l ) molecules
c. Sodium ions and chloride ions
D. Sodium atoms and chlorine molecules
11
283 Which of the following oxide is expected to react readily with NaOH?
A. ( N a_{2} O )
в. ( C a O )
c. ( N O )
D. ( C l_{2} O_{7} )
11
284 Observe the given chemical change and answer the following.
i) Identify ‘A’ and ‘B’.
ii) Write the commercial name of
calcium hydroxide.
iii) Identify products ‘C’ and ‘D’, when
( H C l ) is allowed to react with calcium
oxide.
iv) Say whether calcium oxide is acidic or basic.
11
285 Oxide, peroxide and superoxide – all the three can be formed by:
A. ( L i, K )
в. ( N a, K )
c. ( K, R b )
D. ( N a, C s )
11
286 Compare the solubility and thermal stability of alkali metals carbonates with those of the alkaline earth metals
nitrates.
11
287 Write equation for the reaction which take place when gas ( X ) reacts with lime water to form white precipitate ( Y ) 11
288 A compound ( X ) on heating gives a colorless gas. The residue is dissolved
in water to obtain ( Y . ) Excess ( C O_{2} ) is
bubbled through aqueous solution of ( Y ) and ( Z ) is formed. ( Z ) on gentle heating
gives back ( X . ) The ( X ) is:
A ( cdot C a C O_{3} )
в. ( C aleft(H C O_{3}right)_{2} )
c. ( N a_{2} C O_{3} )
D. ( N a H C O_{3} )
11
289 When sodium is heated in moist air, the ultimate product obtained is:
A. ( N a_{2} O )
в. маОН
c. ( N a_{2} C O_{3} )
D. ( N a_{2} O_{2} )
11
290 What happens when Chlorine gas is passed through a hot concentrated
solution of ( N a O H ? )
11
291 In the electrolysis of aqueous ( N a C l ) solution, side reactions taking place
are :
(I) ( 2 O H^{-}+C l_{2} longrightarrow 2 O C l^{-}+H_{2} )
(II) ( 2 N a+2 H_{2} O longrightarrow 2 N a O H+H_{2} )
(III) ( 4 O H^{-} longrightarrow O_{2}+2 H_{2}+4 e^{-} )
Select the correct alternate.
A . ।, ॥
B. ॥, ॥ I
c. ।, ॥ा
D. I, II and III
11
292 The increasing order of solubility is :
A. ( C a C O_{3}, K H C O_{3}, N a H C O_{3} )
в. ( operatorname{NaHCO}_{3, K H C O_{3}, C a C O_{3}} )
c. ( K H C O_{3}, N a H C O_{3}, C a C O_{3} )
D. ( C a C O_{3}, N a H C O_{3}, K H C O_{3} )
11
293 Solvay process is used for the manufacture of :
A . ( N a O H )
в. ( N a_{2} C O_{3} .10 H_{2} O )
( mathrm{c} cdot K_{2} mathrm{CO}_{3} )
D. ( N a_{2} O_{2} )
11
294 The metal ( X ) is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form colourless solid from which hydrogen is released on treatment with water. The metal is :
A ( cdot ) Al
B. ca
( c cdot c u )
D. zn
11
295 Q. 6 Metals form basic hydroxides. Which of the following metal hydroxide is
the least basic?
(a) Mg(OH)2 (b) Ca(OH), (c) Sr(OH)2 (d) Ba(OH)2
11
296 Quick Lime can be obtained by:
A. adding hydrochloric acid to calciumm
B. heating limestone in a lime kiln
c. putting calcium in hot water
D. none of these
11
297 Q9. Give the important uses of the following compounds.
(1) NaHCO, (ii) NaOH
11
298 When plaster of paris comes in contact
with water it sets into a hard mass. The
composition of the hard mass is:
A ( cdot operatorname{CaSO}_{4} cdot H_{2} O )
в. ( operatorname{CaSO}_{4} cdot operatorname{Ca}(O H)_{2} )
( mathrm{c} cdot mathrm{CaSO}_{4} cdot 2 mathrm{H}_{2} mathrm{O} )
D. ( operatorname{CaSO}_{4} .2 mathrm{Ca}(mathrm{OH})_{2} )
11
299 Choose the correct answer form the
alternatives given

Match column I with column II and
mark the appropriate choice.
( begin{array}{llll} & text { Column I } & & text { Column II } \ text { (A) } & text { Li } & text { (i) } & M_{2} O_{2} \ text { (B) } & text { Na } & text { (ii) } & M O_{2} \ text { (C) } & text { Rb } & text { (iii) } & M_{2} Oend{array} )
( A )
( (A) rightarrow(i),(B) rightarrow(i i),(C) rightarrow(i i i) )
в. ( (A) rightarrow(i i i),(B) rightarrow(i i),(C) rightarrow(i) )
( c )
( (A) rightarrow(i i i),(B) rightarrow(i),(C) rightarrow(i i) )
( D )
( (A) rightarrow(i i),(B) rightarrow(i i i),(C) rightarrow(i) )

11
300 Q. 38 Write Lewis structure of 0, ion and find out oxidation state of each
oxygen atom? What is the average oxidation state of oxygen in this ion?
11
301 Q3. Explain why BeH, molecule has a zero dipole moment although the Be-H bonds are polar.
Ans The Lattic structure for BH is
follows:
11
302 Finely powdered clay and limestone mixed with water is introduced in:
A. drum mixer
B. rotary kiln
c. pan-type granulator
D. dryer
11
303 Sodium is found more useful than
potassium. If true enter 1 ,if false enter 0
11
304 Give preparation of Calcium oxide. 11
305 Washing soda is :
A. ( N a_{2} C O_{3} )
B. ( N a C l )
c. ( N a_{a} C O_{3} cdot 10 H_{2} O )
D. ( N a_{2} S O_{4} )
11
306 Q. 26 Identify the correct formula of halides of alkaline earth metals from the
following.
(a) BaCl, 2H,0 (b) BaCl2-4H,0 (c) CaCl-6H,0 (d) SrCl. 4H2O
11
307 A burning strip of ( M g ) is introduced into
a jar containing a gas. After some time, the walls of the container are coated
with carbon. The gas in the container is :
( A cdot O_{2} )
в. ( N_{2} )
( c cdot C O_{2} )
D. ( H_{2} O )
11
308 The alkali metals form salt-like
hydrides by the direct synthesis at elevated temperature. The thermal
stability of these hydrides decreases in which of the following orders?
A. ( N a H>L i H>K H>R b H>C s H )
в. ( L i H>N a H>K H>R b H>C s H )
c. ( C s H>R b H>K H>N a H>L i H )
D. ( K H>N a H>L i H>C s H>R b H )
11
309 Which of the following metals is required as a cofactor by all enzymes utilizing ATP in phosphate transfer?
( A cdot K )
в. са
c. Na
D. Mg
11
310 A solution of calcium in liquid ammonia when evaporated to dryness gives a complex:
A. Pure ( C a )
в. ( left[mathrm{Ca}left(mathrm{NH}_{3}right)_{x}right]^{2+} )
( c )
( left[mathrm{Ca}left(mathrm{NH}_{3}right)_{6}right]^{2} )
D. ( C aleft(N H_{3}right)_{6} )
11
311 Chlorine gas reacts with red hot
calcium oxide to give:
A. bleaching powder and dichlorine monoxide
B. bleaching powder and water
C . calcium chloride and chlorine dioxide
D. calcium chloride and oxygen
11
312 The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of cationic species?
( left[boldsymbol{K}^{+}, boldsymbol{C} boldsymbol{a}^{2+}, boldsymbol{M} boldsymbol{g}^{2+}, boldsymbol{B} boldsymbol{e}^{2+}right] )
A ( cdot M g^{2+}<B e^{2+}<K^{+}<C a^{2+} )
B . ( B e^{2+}<K^{+}<C a^{2+}<M g^{2+} )
C ( cdot K^{+}<C a^{2+}<M g^{2+}<B e^{2+} )
D. ( C a^{2+}<M g^{2+}<B e^{2+}<K^{+} )
11
313 Which of the following is/are not
correctly matched?

This question has multiple correct options
A. Basic strength of oxides: ( C s_{2} O<R b_{2} O<K_{2} O<N a_{2} O< )
( L i_{2} O )
B. Stability of peroxides: ( N a_{2} O_{2}<K_{2} O_{2}<R b_{2} O_{2}<C s_{2} O_{2} )
C . Stability of bicarbonates: ( L i H C O_{3}<N a H C O_{3}< )
( K H C O_{3}<R b H C O_{3}<C s H C O_{3} )
D. Melting point: ( N a F<N a C l<N a B r<N a I )

11
314 “Calcium and barium bicarbonates are
stable only in solution and decompose on removal of water to give carbonates.” Answer whether the above statement is
true or false.
If true enter 1 , else enter 0
11
315 The basic character of oxides
( M g O, S r O, K_{2} O, N i O, C s_{2} O ) increase
in the
order:
A ( . M g O>S r O>K_{2} O>N i O>C s_{2} O )
в. ( C s_{2} O<K_{2} O<M g O<S r O<N i O )
c. ( N i O<M g O<S r O<K_{2} O<C s_{2} O )
D. ( K_{2} O<N i O<M g O<S r O<C s_{2} O )
11
316 Sodium ions helps in:
This question has multiple correct options
A. transmission of nerve signals
B. transport of sugar and amino acids into cells
C. activation of different enzymes
D. oxidation of glucose to produce ATP
11
317 When ( C O_{2} ) is passed through lime water, it turns milky. The milkiness is due to:
A. ( C a C O_{3} )
в. ( C a(O H)_{2} )
( mathrm{c} cdot mathrm{H}_{2} mathrm{O} )
D. ( C O_{2} )
11
318 Q. 24 Which of the following compounds are readily soluble in water?
(a) BeSO4 (b) MgSO4 (c) BaSO4
(d) SSOA
11
319 The lattice energy of the carbonates of
Mg, Ca, Sr and Ba follow the order:
A. ( M g C O_{3}>C a C O_{3}>S r C O_{3}>B a C O_{3} )
в. ( C a C O_{3}>S r C O_{3}>B a C O_{3}>M g C O_{3} )
c. ( B a C O_{3}>S r C O_{3}>C a C O_{3}>M g C O_{3} )
D. ( operatorname{Sr} mathrm{rCO}_{3}>mathrm{MgCO}_{3}>mathrm{CaCO}_{3}>mathrm{BaCO}_{3} )
11
320 About alkali metal – liquid ( boldsymbol{N} boldsymbol{H}_{3} )
solution which of the following statement is not true?
A. Blue colour due to ammoniated electrons
B. Blue colour changes to bronze on dilution due to formation of metal clusters
c. with increse in concentration of alkali metals paramagnetic nature decreases due to electron electron combination
D. on heating blue colour becomes colourless due to formation of metal amide and ( H_{2} ) gas
11
321 The cathode in outer compartments of Castner-Kellner process is made of:
A . iron
B. copper
c. graphite
D. mercury
11
322 Write equation for the reaction which take place when limestone reacts with
dilute HCI.
11
323 Solution of alkali metals in liquid ammonia conducts electricity due to the presence of solvated electrons. If true enter 1 , if false enter 0 .
A
B.
c. explanation is wrong
D. Liquid ammonia not conduct electricity
11
324 The covalent alkaline earth metal halide
( (boldsymbol{X}=boldsymbol{C l}, boldsymbol{B r}, boldsymbol{I}) ) is:
A. ( operatorname{CaX}_{2} )
в. ( operatorname{Sr} X_{2} )
( mathbf{c} cdot B e X_{2} )
D. ( M g X_{2} )
11
325 Which of the following will have lowest
value of ( boldsymbol{K}_{s p} ) at room temperature?
A. ( B e(O H)_{2} )
B. ( M g(O H)_{2} )
( mathbf{c} cdot operatorname{Ca}(O H)_{2} )
D. ( B a(O H)_{2} )
11
326 Which of the following oxides is not expected to react with sodium hydroxide?
A. ( B e O )
в. ( B_{2} O_{3} )
( c . C a O )
D. ( operatorname{si} 0_{2} )
11
327 Q4. Write the chemical formula of the following compounds.
(i) Chile salt petre (ii) Marble
(iii) Brine
11
328 Out of the following, which is the most stable compound?
A ( cdotleft[B eleft(H_{2} Oright)_{4}right]^{2+} )
В ( cdotleft[M gleft(H_{2} Oright)_{4}right]^{2+} )
( ^{mathrm{c}} cdotleft[C aleft(H_{2} Oright)_{4}right]^{2+} )
D. ( left[operatorname{Sr}left(H_{2} Oright)_{4}right]^{2+} )
11
329 On dissolving moderate amount of
sodium metal in liquid ( N H_{3} ) at low temperature, which one of the following
does not occur?
A. Blue coloured solution is obtained
B. ( N a^{+} ) ions are formed in the solution
C . Liquid ( N H_{3} ) becomes good conductor of electricity
D. Liquid ammonia remains diamagnetic
11
330 lime water is a solution of:
A ( cdot C a(O H)_{2} ) in water
B. ( C a C l_{2} ) in water
c. NaOH in water
D. NaCl in water
11
331 “Both Li and Mg forms Basic oxides.”.” Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
332 Property of the alkaline earth metals
that increases with their atomic
number:
A. solubility of their hydroxides in water
B. solubility of their sulphates in water
c. ionization energy
D. electronegativity
11
333 The pair of amphoteric hydroxides is:
A ( cdot operatorname{Be}(O H)_{2} ) and ( Z n(O H)_{2} )
B ( cdot operatorname{Al}(O H)_{3} ) and ( L i O H )
c. ( _{B}(O H)_{3} ) and ( B e(O H)_{2} )
D. ( B e(O H)_{2} ) and ( M g(O H) )
11
334 Calcium carbonate is a chemical
compound with the formula
( boldsymbol{C a}left(boldsymbol{H} boldsymbol{C O}_{3}right)_{2} )
( A cdot O )
11
335 Q6. Name the alkaline earth metals whose salt do not impart colour to a non-luminous flame. 11
336 Q19. Which is more basic NaOH or Mg(OH)? 11
337 Assertion
FrCl has ( C )s ( C l ) structure with
coordination number 8
Reason
( C N 8 ) is favoured by the large cation size.

Read the above assertion and reason
and choose the correct option regarding
¡t.
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
338 Gas ( (X) ) turns lime water milky. Gas ( (X) )
also turns acidied ( K_{2} C r_{2} O_{7} ) green. ( (X) ) is :
A ( . C O )
в. ( C O_{2} )
( c cdot s O_{2} )
D. none of these
11
339 Setting of mortar is the result of
reaction between slaked lime and ( C O_{2} )
of air.
A. True
B. False
11
340 Which of the given alkaline earth metal is hardest of all alkaline earth metals?
( A cdot ) Mg
B. ca
c. Ве
D. sr
11
341 ( M_{2} O_{3} ) (sesquoxides) is paramagnetic
in nature. It is due to presence of :
A. peroxide ion.
B. superoxide ion.
c. oxide ion
D. all of these
11
342 Which one of the following hydroxide
is insoluble in water?
( mathbf{A} cdot C a(O H)_{2} )
B. ( B a(O H)_{2} )
( mathbf{c} cdot B e(O H)_{2} )
D. ( M g(O H)_{2} )
11
343 Q6. (a) What makes lithium to show properties uncommon to the rest of the alkali metals?
(b) When is a cation highly polarising? Which alkali metal cation has the highest polarising
power?
11
344 Statement-1: Lithium chloride is
predominately covalent compound. Statement-2: Electronegativity difference between Li and Cl is small.
A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-
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
345 Q7. Why are ionic hydrides of only alkali metals and alkaline earth metals are known? Give two
examples.
11
346 The common name, “cream of tartar”
refers to:
( mathbf{A} cdot K H C_{4} H_{4} O_{6} )
( mathbf{B} cdot K(S b O) C_{4} H_{4} O_{6} )
( mathbf{c} cdot K N a C_{4} H_{4} O_{6} )
D. ( M g_{2}(O H)_{2}left(C_{4} H_{4} O_{6}right) H_{2} O )
11
347 Sodium metals are kept in kerosene oil
Why?
11
348 At high temperature, nitrogen combines
with ( C a C_{2} ) to give:
A. calcium cyanide
B. calcium cyanamide
c. calcium carbonate
D. calcium nitride
11
349 Which of the following statements is true about IIA group elements?
A. All form nitrides in air.
B. ( B e ) is amphoteric
c. ( M H_{2} ) is ionic salt-like hydride.
D. All are correct.
11
350 Calcium hydroxide is found in:
A. window cleaner
B. soap
c. lime water
D. milk of magnesia
11
351 Match the column. 11
352 Q17. Why do alkali metals give characteristic flame colouration? 11
353 What is slaked lime? 11
354 Cancer is a disease where body cells grow unchecked. A protein found in the body interferes with the growth of
cancer cells. It is used for the treatment
of cancer. Identify it
A. Haemoglobin
B. casein
c. Keratin
D. Interferon
11
355 Among the following, the diamagnetic compound is/ are:
This question has multiple correct options
A. ( N a_{2} O_{2} )
в. ( O_{3} )
( c cdot N_{2} O )
D. ( K O_{2} )
11
356 Assertion
BaCO ( _{3} ) is more soluble in ( H N O_{3} ) than
in plain water.
Reason
Carbonate is a weak base and reacts
with the ( H^{+} ) from the strong acid causing the barium salt to dissociate.
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
357 The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of LiF in water is due to:
A. ionic nature of lithium fluoride
B. high lattice enthalpy
c. high hydration enthalpy for lithium ion
D. low ionisation enthalpy of lithium atom
11
358 .1 The alkali metals are low melting. Which of the following alkali metal is
expected to melt if the room temperature rises to 30°C?
(a) Na
(b) K
(c) Rb
(d) Cs
en
11
359 Identify A to in the following sequence of reaction. ( boldsymbol{N} boldsymbol{a}+boldsymbol{O}_{2} rightarrow(boldsymbol{A}) stackrel{boldsymbol{H} C l}{rightarrow} )
( (B) frac{e t h e r}{H^{+} / K_{2} C r_{2} O_{7}} C )
( C ) is forms blue colour in ethereal
solution.
A ( cdot ) A: ( N a_{2} O_{2}, ) B ( : H_{2} O, c: C r O_{3} )
B. A: ( N a O_{2}, ) В ( : H_{2} O_{2}, mathrm{C}: C r_{2} O_{7} )
c. ( A: N a_{2} O_{2}, B: H_{2} O_{2}, c: C r O_{3} )
D. A: ( N a O, ) В ( : H_{2} O, c: C r O_{3} )
11
360 Pick out the false statement:
This question has multiple correct options
A. the electropostive character of alkali metals decreases with increases in atomic number
B. lithium is a hard metal and cannot be cut with a knife
C. Alkali metals are strong reducing agents
D. the electro-negativities of all alkali metals remain the
same.
11
361 Sodium hydroxide reacts with ( S O_{2} ) in aqueous medium to give:
A. ( operatorname{NaHSO}_{3} )
в. ( N a_{2} S_{2} O_{3} )
( mathbf{c} cdot operatorname{NaH} S O_{4} )
D. ( N a_{2} S O_{3} )
11
362 The first ionization potentials ( (e V) ) of
( B e ) and ( B ) respectively are:
A. 8.29,9.32
В. 9.32,9.32
c. 8.29,8,29
D. 9.32,8.29
11
363 Lithium halide that is least soluble in
water has a molecular mass (rounded
to nearest integer)
11
364 The formation of ( C a O ) from lime stone
is favoured by:
A. adding flux
B. removing ( C O_{2} )
c. adding methyl
D. adding ( C a )
11
365 48. Caustic soda is :
(1) deliquescent
(2) oxidant
(3) reductant
(4) efflorescent
11
366 Metal carbonates decompose on
heating to give metal oxide and carbon dioxide. Which of the metal carbonates
is most stable thermally?
A. ( M g C O_{3} )
в. ( C a C O_{3} )
( mathrm{c} cdot operatorname{Sr} mathrm{CO}_{3} )
D. ( B a C O_{3} )
11
367 A sanitary worker uses a white chemical having strong smell of chlorine gas to disinfect the water tank
¡) Identify the chemical compound.
ii) Write its chemical formula
iii) Write chemical equation for preparing it
11
368 Which of the following statement is
false regarding sodium?
A. It takes the oxidation state +1
B. It reacts with water to form a basic solution
C. It forms metallic bonds in its solid uncombined form
D. It is found in nature as a diatomic gas
E. It reacts with a halogen to form an ionic salt
11
369 Nitrolim is a:
A. mixture of calcium carbide and nitrogen
B. mixture of calcium cyanamide and carbon
C. mixture of calcium cyanide and carbon
D. mixture of ( N H_{4} C N ) and ( C a C N )
11
370 In the synthesis of sodium carbonate, the recovery of ammonia is done by
treating ( N H_{4} C l ) with ( C a(O H)_{2} )
The by-product obtained in this process is:
A. ( C a C l_{2} )
в. ( N a C l )
c. ( N a O H )
D. ( operatorname{NaH} mathrm{CO}_{3} )
11
371 Q5. What happens when crystals of washing soda are exposed to air? 11
372 What is the order of mobilities of the
alkali metal ions in aqueous solution?
( mathbf{A} cdot L i^{+}>N a^{+}>K^{+}>C s^{+}>R b^{+} )
B. ( N a^{+}<L i^{+}<K^{+}<R b^{+}K^{+}>N a^{+}>R b^{+}>C s^{+} )
D. ( L i^{+}<N a^{+}<K^{+}<R b^{+}<C s^{+} )
11
373 The products obtained when chlorine gas reacts with cold and dilute aqueous
NaOH are:
A ( cdot C l O^{-} ) and ( C l O_{3}^{-} )
в. ( C l O_{2}^{-} ) and ( C l O_{3}^{-} )
c. ( C l^{-} ) and ( C l O^{-} )
D. ( C l^{-} ) and ( C l O_{2}^{-} )
11
374 You may have noticed that chicken-egg is very strong along its long axis so much so that it does not break even
when pressed very hard. Which of the following is the main constituent of egg-shell?
A. ( operatorname{CaSO}_{4} cdot 2 mathrm{H}_{2} mathrm{O} )
B. ( C a S O_{4} cdot frac{1}{2} H_{2} O )
( mathrm{c} cdot operatorname{casio}_{3} )
( mathrm{D} cdot mathrm{CaCO}_{3} )
11
375 R. 42 Match the compounds given in Column I with their uses mentioned in
Column II.
Column
Column II
A. CaCO₃
1. Dentistry, ornamental work
B. Ca(OH),
2. Manufacture of sodium carbonate
from caustic soda
C. CaO
3. Manufacture of high quality paper
D. Caso
4. Used in white washing
11
376 For the following reaction, identify the
gaseous product formed. ( boldsymbol{N} boldsymbol{a}_{2} boldsymbol{C O}_{3}+ )
( boldsymbol{H} boldsymbol{C l} rightarrow )
A ( . C O )
в. ( C O_{2} )
( c cdot O_{2} )
D. ( H_{2} O )
11
377 ( (X),(Y),(Z) ) are elements in the third period. Oxide of ( (X) ) is ionic, that of ( (Y) ) is amphoteric, and of ( (Z) ) a giant molecule.
( (X),(Y) ) and ( (Z) ) will have atomic
numbers in the order:
( A cdot(x)<(y)<(z) )
( B cdot(z)<(Y)<(X) )
( c cdot(x)<(z)<(y) )
( D cdot(Y)<(X)<(Z) )
11
378 In the following sequence of reactions, identify the end product (D). ( N a_{2} C O_{3} stackrel{S O_{2}}{rightarrow}(A) stackrel{N a_{2} C O_{3}}{longrightarrow}(B) )
Elemental ( S, Delta )
( (boldsymbol{C}) stackrel{boldsymbol{I}_{2}}{rightarrow}(boldsymbol{D}) )
A ( cdot N a_{2} S O_{4} )
в. ( N a_{2} S_{4} O_{6} )
c. ( N a_{2} S )
D. ( N a_{2} S_{2} O_{3} )
11
379 Match the cations from List I with their
properties in List II.
11
380 When carbon monoxide is passed over
solid caustic soda heated to ( 200^{circ} mathrm{C} ), it
forms:
A. ( N a_{2} C O_{3} )
в. ( mathrm{NaHCO}_{3} )
c. ( H C O O N a )
D. ( C H_{3} ) COONa
11
381 State whether the given statement is True or False.

Statement : Sodium nitrate on heating
( operatorname{gives} N O_{2} )
A. True
B. False

11
382 Name of the process.
( A cdot ) Solvay
B. Ammonia-soda
C. Both (A) & (B) correct
D. None of the above
11
383 Assertion
( L i^{+} ) forms series of trihydrates ( L i X )
( mathbf{3} boldsymbol{H}_{mathbf{2}} boldsymbol{O}[boldsymbol{X}= )
( boldsymbol{C l}, boldsymbol{B r}, boldsymbol{I}, boldsymbol{C l O}_{2}, boldsymbol{C l o}_{4}, boldsymbol{M n O}_{4}, boldsymbol{N O}_{3}, boldsymbol{b} )
Reason
This is due to its smaller size ( left(L i^{+}right) ) and highest ion dipole interaction.
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
384 Which one of the following is correct
with respect to molar ionic
conductance of ions in aqueous
solution?
( mathbf{A} cdot L i^{+}<N a^{+}<K^{+}<R b^{+} )
B ( cdot R b^{+}<K^{+}<N a^{+}<L i^{+} )
( mathbf{c} cdot S r^{2+}<C a^{2+}<M g^{2+}<B e^{2+} )
D. ( N a^{+}<K^{+}<L i^{+}<R b^{+} )
11
385 Identify which contributes for strengthening of lime mortar structures and contributes for weakening of RCC structures the factor(s)
A. Usage of water containing dissolved salts
B. Addition of lime
C. Absorption of ( C O_{2} ) from atmospheric air
D. Both B and C
11
386 Q5. Explain why is sodium less reactive than potassium. 11
387 Following are the ionisation potential values of :
( left(I_{1}right) 899 k J m o l^{-1},left(I_{2}right) 1757 k J m o l^{-1},left(I_{3}right. )
A. Na
B.
c. Ве
D. Ne
11
388 The substance not likely to contain
( boldsymbol{C a C O}_{3} ) is :
A. calcined gypsum
B. sea shells
c. dolomite
D. a marble statue
11
389 Which of the following is not hygroscopic?
A. ( mathrm{NaCl} )
в. ( mathrm{MgCl}_{2} )
c. ( mathrm{caCl}_{2} )
D. LiCl
11
390 Q. 47 Present a comparative account of the alkali and alkaline earth metals
with respect to the following characteristics.
(a) Tendency to form ionic/covalent compounds
(b) Nature of oxides and their solubility in water
(c) Formation of oxosalts
(d) Solubility of oxosalts
(e) Thermal stability of oxosalts
nrndominanthionic but less ionic than
11
391 Molten sodium is used in nuclear
reactors to:
A. absorb neutrons in order to control the chain reaction
B. slow down the fast neutrons
C. absorb the heat generated by nuclear fission
D. extract radio -isotopes produced in the reactor
11
392 Q. 29 How do you account for the strong reducing power of lithium in aqueous
solution?
di torms of
11
393 Q. 33 Name an element from group 2 which forms an amphoteric oxide and a
water soluble sulphate.
11
394 ( ” N a_{2} C O_{3} ) is more thermally stable than
( boldsymbol{L} boldsymbol{i}_{2} boldsymbol{C} boldsymbol{O}_{3} )
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
395 heated on the flame directly. It crumbled to give white powder of calcium oxide. After cooling, when water is added to it a hissing sound is heard and water started boiling. If it is allowed to stay over night, a clear solution (top layer) is taken and for this experiment below as lime water.

When carbon dioxide is bubbled into
testtube a clear solution of lime water, turbidity appears first and later a white precipitate of calcium carbonate is formed. Carbon dioxide is continued to
passed into the same solution and the solution again became clear because of
formation of calcium bicarbonate. On
heating the contents of the tube, white precipitate of calcium carbonate
reappears. Heating of calcium bicarbonate gave the following:
A. Calcium oxide and carbon dioxide
B. Calcium carbonate, water and ( C O_{2} )
c. calcium bicarbonate and ( C O_{2} )
D. Calcium hydroxide and carbon dioxide

11
396 What happens when:
(i) magnesium is burnt in air
(ii) quick lime is heated with silica
(iii) chlorine reacts with slaked lime
(iv) calcium nitrate is heated
11
397 A mixture of cement, gravel, coarse sand and water is called:
A. mortar
B. concrete
c. slurry
D. hardner
11
398 Write a balanced chemical equation for the following:

Flowers of sulphur boiled with calcium
hydroxide.

11
399 HILI LUDUILUUUU
Q14. Why is Li,co, decomposed at a lower temperature whereas Na,Co, at higher temperature?
bd Therefore
11
400 Q4. Which electrolyte is used to obtain sodium in Castner’s process? 11
401 heated on the flame directly. It crumbled to give white powder of calcium oxide. After cooling, when water is added to it a hissing sound is heard and water started boiling. If it is allowed to stay over night, a clear solution (top layer) is taken and for this experiment
below as lime water.

When carbon dioxide is bubbled into
testtube a clear solution of lime water,
turbidity appears first and later a white precipitate of calcium carbonate is formed. Carbon dioxide is continued to
passed into the same solution and the solution again became clear because of formation of calcium bicarbonate. On
heating the contents of the tube, white precipitate of calcium carbonate
reappears.
Passing of carbon dioxide to lime water gave the following initially
A. Calcium bicarbonate and carbon dioxide
B. Calcium carbonate and water
c. calcium carbonate and carbon dioxide
D. Calcium oxide and water

11
402 Alkali metals (M) dissolve in liquid
( N H_{3} ) to give:
A ( cdot M N H_{2} )
в. ( M H )
C ( cdotleft[Mleft(N H_{3}right)_{x}right]^{+}+left[eleft(N H_{3}right)_{y}right] )
D. ( M_{3} N )
11
403 In the following reactions ( boldsymbol{M} boldsymbol{g}+boldsymbol{a i r} underset{rightarrow}{longrightarrow}(boldsymbol{A})+(boldsymbol{E}) )
( (A)+H_{2} O rightarrow(B) C O_{2}(C) )
( (boldsymbol{E})+boldsymbol{H}_{2} boldsymbol{O} rightarrow(boldsymbol{D})+(boldsymbol{B}) )
mole of (B) neutralises 2 moles of HCl.
(A) to (E) are ( (A): M g O(B) )
( boldsymbol{M} boldsymbol{g}(boldsymbol{O} boldsymbol{H})_{2}(boldsymbol{C}): boldsymbol{M} boldsymbol{g} boldsymbol{C} boldsymbol{O}_{3}(boldsymbol{D}) )
( boldsymbol{N} boldsymbol{H}_{3}(boldsymbol{E}): boldsymbol{M} boldsymbol{g}_{3} boldsymbol{N}_{2} )
If true enter ( 1, ) else enter 0
11
404 Choose the correct answer form the
alternatives given. When alkaline earth metals dissolve in
ammonia, they form coloured solution like alkali metals. Which of the
following observations regarding the reaction are correct?
(i) Dilute solution are bright blue in
colour due to solvated electrons.
(ii) These solutions decompose to form amides and hydrogen.
(iii) From this solution the ammoniates
( left[Mleft(N H_{3}right)_{6}right]^{2+} ) can be recovered by
evaporation
A. only (i) and (ii)
B. Only (i) and (ii) and (iii)
c. only (ii) and (iii)
D. only (i)
11
405 Which of the bicarbonates does not
exist in solid state?
A. ( N a H C O_{3} )
в. ( K H C O_{3} )
c. ( operatorname{Ca}left(H C O_{3}right)_{2} )
D. ( R b H C O_{3} )
11
406 Oxidation state of oxygen in ( K O_{2} ) is :
A . 0
B. –
( c cdot-frac{1}{2} )
D. –
11
407 The molecular formula of gypsum is :
A. ( operatorname{CaSO}_{4} . mathrm{H}_{2} mathrm{O} )
в. ( operatorname{CaSO}_{4} .2 mathrm{H}_{2} mathrm{O} )
( mathrm{c} cdot 2 operatorname{CaSO}_{4} cdot mathrm{H}_{2} mathrm{O} )
D. ( operatorname{CaSO}_{4} .3 mathrm{H}_{2} )
11
408 Nature of ( C O ) when it reacts with
NaOH is acidic. State True or False:
A . true
B. false
c. neither true nor false
D. none of the above
11
409 50. Soda ash is the name for :
(1) Sodium bicarbonate
(2) Hydrated sodium carbonate
(3) Sodium hydroxide
(4) Anhydrous sodium carbonate
11
410 When ( N a N O_{2} ) is heated in absence of
air the products is/are? This question has multiple correct options
A ( cdot ) NaNO ( _{3} )
В. ( N a_{2} O )
( c cdot N_{2} )
D. ( O_{2} )
11
411 Which of the following statement gives the correct explanation of the fact
that solubility of alkali metal fluorides increases down the group?
A. Hydration energy increases and lattice energy decreases down the group
B. Both energy decrease down the group but decrease in hydration energy is rapid.
c. Both energy decrease down the group but decrease in lattice energy is more
D. Both energy increase down the group but increase in hydration energy is rapid.
11
412 “KO ( _{2} ) is ( O_{2} ) absorber and ( C O_{2} )
producer.” It is also used in
submarines.”
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
413 Why are the group I metals soft, low melting and of low density? 11
414 Q. 16 Which of the following elements does not form hydride by direct heating
with dihydrogen?
(a) Be
(b) Mg
(c) Sr
(d) Ba
11
415 Acetic acid was added to a solid ( X )
taken in a test tube. A colourless and
odourless gas was evolved. The gas was passed through lime water which did not turn milky. However, the gas burnt
with a pop sound. It was concluded
that
A. Solid ( x ) is sodium and the gas evolved is ( C O_{2} )
B. Solid X is sodium and the gas evolved is ( H_{2} )
c. solid ( x ) is sodium acetate and the gas evolved is ( C O_{2} )
D. Solid ( x ) is sodium chloride and the gas evolved is ( H_{2} )
11
416 Assertion
The mobility of sodium ion is lower than that of potassium ion.
Reason
The ionic mobilities depend on the effective radius of the 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
417 A chemistry student trying to detect the metallic ion in a salt makes a paste on
the clean ( P t ) wire-loop of the salt with
concentrated ( H C l . ) When he takes a
small amount of this paste and keeps it in a non-luminous Bunsen flame, the
color of the flame changes to grassy
green. He should, therefore, conclude
that the metal is:
A. ( M g )
в. ( C a )
c. ( B a )
D. ( R a )
11
418 Which of the following does not form peroxides?
( A . B a )
в. ( B e )
( c . C a )
D. ( M g )
11
419 ( K O_{2}( ) potassium superoxide ) is used in
oxygen cylinders in space and submarines because, it :

This question has multiple correct options
A. decomposes to give oxygen
B. eliminates moisture
( c . ) absorbs ( C O_{2} )
D. produces ozone

11
420 Which of the following is known as fusion mixture?
A. mixture of ( N a_{2} C O_{3}+N a H C O_{3} )
в. ( N a_{2} C O_{3}+10 H_{2} O )
c. mixture of ( K_{2} C O_{3}+N a_{2} C O_{3} )
D. ( N a H C O_{3} )
11
421 Q20. The Indroxides and carbonates of sodium and potassium are easily soluble in water while the
corresponding salts of magnesium and calcium are sparingly soluble in water. Explain.
11
422 Which of the following has highest melting point?
A. Magnesium
B. Barium
c. Calcium
D. Beryllium
11
423 Read the following passage and answer the questions at the end of it.
Dilute solution of alkali metals in
liquied ( N H_{3} ) is blue. It is the
ammoniated electron which is
responsible for the blue color of the
solution and the electrical conductivity is due to the ammoniated cation,
( left[boldsymbol{M}left(boldsymbol{N} boldsymbol{H}_{3}right)_{x}right]^{+} ) as well as the
ammoniated electron, ( left[eleft(N H_{3}right)_{y}right]^{-} )
values of ( x ) and ( y ) depend on the extent of
solvation ( left(b y N H_{3}right) . ) Dilute solutions are
paramagnetic due to free electrons.
What happens if alkali metal is allowed
to react with concentrated ammonia
solution?
A. Paramagnetic character of solvated electrons is retained
B. Solvated electrons associate to form electron-pairs and paramagnetic character decreases
C. Reducing character is increased
D. Reducing character is not affected
11
424 Choose the correct answer form the
alternatives given. Match the column I with column II and
mark the appropriate choice.
Column I Column I
(A) Quick
lime
(i) Setting fractured bones
(B) Plaster of
Paris
(ii) A constituent of gum chewing
Manufacture Slaked
lime O
( (c) )
(iii) bleaching powder
(D) limestone
(iv) Manufacture of dyestuffs
A ( cdot(A) rightarrow(i),(B) rightarrow(i v),(C) rightarrow(i i),(D) rightarrow(i i i) )
B. ( (A) rightarrow(i v),(B) rightarrow(i),(C) rightarrow(i i i),(D) rightarrow(i i) )
c. ( (A) rightarrow(i i),(B) rightarrow(i i i),(C) rightarrow(i),(D) rightarrow(i v) )
( D )
( (i i i),(B) rightarrow(i i),(C) rightarrow(i v),(D) rightarrow(i) )
11
425 Statement I: Cl and Na form an ionic
bond.

Statement II: Cl donates an electron to
Na.
A. Statement I is True, Statement II is True and statement II is correct explanation of statements
B. Statement I is True, Statement II is True and statement II is NOT correct explanation of statements
C. Statement I is True, Statement II is False
D. Statement I is False, Statement II is True
E. Statement I is False, Statement II is False

11
426 The nitrate (A) can be confirmed by
flame test.

The colour imparted by the salt to the flame is :
A . yellow
B. green
c. blue
D. red

11
427 Q2. What is the effect of heat on the following compounds (Give equations for the reactions)?
(1) CaCO; (ii) CaSO4 2H,0
11
428 The metal used in solar cells is:
A. Na
B. Li
( c cdot c s )
D. Mg
11
429 Which of the following sodium compound(s) are formed when an
organic compound containing both nitrogen and sulphur is fused with sodium?
A. Cyanide and sulphide
B. Thiocyanate
c. Sulphite and cyanide
D. Nitrate and sulphide
11
430 Q. 20 A chemical A is used for the preparation of washing soda to recover
ammonia. When Co, is bubbled through an aqueous solution of A, the
solution turns milky. It is used in white washing due to disinfectant
nature. What is the chemical formula of A?
(a) Ca(HCO3)2
(b) Cao
(c) Ca(OH)2
(d) CaCO3
U
is used
11
431 Filtrate ( A ) contains:
( mathbf{A} cdot N H_{4} C l )
( mathrm{B} cdot mathrm{Na}_{2} mathrm{CO}_{3} )
( mathbf{c} cdot N a H C O_{3} )
( mathbf{D} cdot C a C O_{3} )
11
432 Q22. Why are lithium salts commonly hydrated and those of the other alkali metal ions usuall..
anhydrous ?
11
433 When moderate amount of sodium
metal is dissolved in liquid ( N H_{3} ) at low
temperature, which one of the following ( operatorname{occur}(s) ? )
This question has multiple correct options
A. Blue colored solution is obtained
B. ( N a^{+} ) ions are formed in the solution
C . Liquid ( N H_{3} ) becomes good conductor of electricity
D. Liquid ( N H_{3} ) remains diamagnetic.
11
434 Assertion
Be and Mg do not impart characteristic colour to the flame.
Reason
Both Be and Mg have high ionization energy.
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
435 Arrange Li, Na, K, Rb, Cs in order of
increasing electron-affinity:
A. ( C s<R b<K<N a<L i )
в. ( K<N a<C s<R b<L i )
c. ( C s<K<R b<L i<N a )
D. None of these
11
436 ( ” L i_{2} C O_{3} ) decomposes into ( C O_{2} ) and
( L i_{2} O ) but other alkali carbonates are
thermally stable.” Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
437 Thus, lithium shows similarities to
magnesium and beryllium to aluminium in many of their properties. This type of diagonal similarity is commonly referred to as diagonal relationship in the periodic table. The
diagonal relationship is due to the similarity in ionic sizes and / or charge
/ radius ratio of the elements.
11
438 Alkali metals dissolve in ammonia to
give a blue solution which is conducting in nature due to:
A. ammoniated electrons
B. loss of electrons
c. ammoniated cations
D. both ( A ) and ( C )
11
439 Why are lithium salts commonly
hydrated and those of the other alkali ions usually anhydrous?
11
440 Which of the following metals on
treatment with alkali will liberate ( boldsymbol{H}_{2} )
gas? This question has multiple correct options
A. Be
B. sn
c. Ga
D. In
11
441 Which of the following is/ are correct statement(s)?
A. Portland cement is the most commonly used cement for construction work.
B. Portland cement is made from raw material which consist of ( 60 % ) lime (calcium oxide), ( 25 % ) silica (silicon dioxide), ( 5 % ) alumina. The rest is iron oxide and gypsum (calcium sulphate)
C . Portland cement gets its name from the stone quarried from the Isle of Portland in England which has a similar texture.
D. All of the above
11
442 Which of the following hydroxides is
most basic?
( mathbf{A} cdot operatorname{Be}(O H)_{2} )
B. ( B a(O H)_{2} )
( mathbf{c} cdot C a(O H)_{2} )
D. ( M g(O H)_{2} )
11
443 Carbon dioxide gas turns limewater
milky.
A . True
B. False
11
444 Explain the difference in reactivity of the group I metals with water. 11
445 Among ( K O_{2}, A l O_{2}^{-}, B a O_{2} ) and ( 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
446 Select the correct statement(s):
This question has multiple correct options
A. Sodium can be prepared by the electrolysing aqueous solution of ( mathrm{NaCl} )
B. Sodium can be prepared by the electrolysing fused NaCl
C. Sodium is a strong oxidising agent
D. Sodium is soluble in liquid ammonia
11
447 Find the number of peroxide molecule(s) in the following:
( M g O, C a O, L i_{2} O, B a O_{2} )
11
448 Dead burnt plaster is :
A. ( operatorname{CaSO}_{4} )
в. ( operatorname{CaSO}_{4} .12 mathrm{H}_{2} mathrm{O} )
( mathrm{c} cdot mathrm{CaSO}_{4} cdot mathrm{H}_{2} mathrm{O} )
D. ( operatorname{CaSO}_{4} .2 mathrm{H}_{2} )
11
449 Q2. State as to why
(a) Alkali metals show only +1 oxidation state.
(b) Na and K impart colour to the flame but Mg does not.
(c) Lithium on being heated in air mainly forms the monoxide and not the peroxide.
(d) Li is the best reducing agent in aqueous solution.
11
450 Which of the following is preferentially formed on reaction of oxygen and potassium?
A ( cdot K_{2} O_{2} )
в. ( K O_{2} )
( mathrm{c} cdot mathrm{K}_{2} mathrm{O} )
D. ( K_{2} O_{3} )
11
451 The elements in Group 17 of the Periodic Table are called the halogens. They form stable compounds with both metals and non-metals.
The table gives some data about
[
F_{2}, H C l text { and } C a F_{2}
]
( boldsymbol{H C l} ) ( boldsymbol{F}_{2} )
Boiling point/ ( K )
( 85 quad 188 )
relative form 38.0 36.5 mass
Explain why ( C a F_{2} ) has a very high boiling point.
11
452 Quick lime is:
A. ( C aleft(H C O_{3}right)_{2} )
в. ( C a C O_{3} )
( mathbf{c} cdot operatorname{Ca}(O H)_{2} )
D. ( C a O )
11
453 Which among the following sets of compounds is used as raw material for the preparation of sodium carbonate by
solvay process?
A. ( N a O H, H C l, C O_{2} )
в. ( N H_{4} C l, H_{2} O, N a C l )
c. ( N a C l, N H_{3}, C a(O H)_{2} )
D. ( N a C l, C a C O_{3}, H_{2} S O_{4} )
11
454 A substances A reacts with another
substances B to produce the product ( C ) and a gas D. If a mixture of the gas ( D ) and ammonia is passed through an aqueous solution of ( mathrm{C} ), baking soda is formed. The substances ( A ) and ( B ) are:
A . ( H C l ) and ( N a O H )
B. ( H C l ) and ( N a_{2} C O_{3} )
c. ( N a ) and ( H C l )
D. ( N a_{2} C O_{3} ) and ( H_{2} O )
11
455 Mg burns in air to form two compound
(A) and (B). (A) is sparingly soluble in water and the resulting solution is weakly basic. (B) dissolve in water to
form (C) and gas (D) with dilute ( boldsymbol{H} boldsymbol{N} boldsymbol{O}_{3} ) gives (E). E on heating gives gas (F)
which behaves as an oxidising agent too. Gas ( F ) on reaction with phosphorus produce an important dehydrating agent (G). The compound G is:
( mathbf{A} cdot P_{4} O_{10} )
( mathbf{B} cdot H P O_{3} )
( mathbf{c} cdot P C l_{5} )
D. ( P_{4} O_{6} )
11
456 Select the correct statement about:
( A g F, C a F_{2}, B e F_{2}, M g F_{2} )
A ( cdot ) AgF and ( B e F_{2} ) are soluble, and ( C a F_{2} ) and ( M g F_{2} ) are insoluble in water.
B. AgF is soluble, others insoluble
c. ( mathrm{AgF} ) is insoluble, others are soluble.
D. All are insoluble
11
457 (Magnesium/Chlorine) oxide is
used for the lining of steel making
furnace.
11
458 Give the chemical name ( & ) formula of
chloride of lime. what happens when it is exposed to air. Write Chemical equation.
11
459 What chemicals are obtained
industrially from sodium chloride? Outline the process.
11
460 Hot air is blown from which side of a
rotary kiln at ( 1873 mathrm{K} ) to manufacture
cement?
A. Mlddle
B. Lower
c. Top
D. No air is blown
11
461 In epsom salt, the number of molecules
of water directly coordinated with
( M g^{2+} ) ion are :
( A cdot 2 )
B. 4
( c cdot 6 )
D.
11
462 What happens when a cold and concentrated solution of sodium
chloride reacts with ammonia and
carbon dioxide? Write the equation of
the reaction takes place.
11
463 8.9 The solubility of metal halides depends on their nature, lattice enthalpy
and hydration enthalpy of the individual ions. Amongst fluorides of
alkali metals, the lowest solubility of Lif in water is due to
(a) ionic nature of lithium fluoride
(b) high lattice enthalpy
(c) high hydration enthalpy for lithium ion
(d) low ionisation enthalpy of lithium atom
11
464 Baking powder used to make a cake is a
mixture of ( operatorname{starch}, N a H C O_{3} ) and
( boldsymbol{C} boldsymbol{a}left(boldsymbol{H}_{2} boldsymbol{P} boldsymbol{O}_{4}right)_{2} . ) The function of
( boldsymbol{C a}left(boldsymbol{H}_{2} boldsymbol{P} boldsymbol{O}_{4}right)_{2} ) is:
A ( cdot ) to slow down the release of ( C O_{2} )
B. being acidic in nature and give ( C O_{2} ) when moistened with ( N a H C O_{3} )
( c . ) to act as a fille
D. none of these
11
465 Beautiful, lake colours are formed by dyes with mordants, which paste the dye to the cloth or fabric. Which of the
following is a mordar used in dying?
A . Calcium carbonate
B. Aluminium sulphate
c. Calcium hydroxide
D. zinc phosphate
11
466 Portland cement is manufactured by using:
A. Limestone, clay and sand
B. Limestone, gypsum and sand
c. limestone, gypsum and alumina
D. limestone, clay and gypsum
11
467 Select correct alternates(s).
This question has multiple correct options
( mathbf{A} cdot operatorname{In} N a H C O_{3}, ) the ( H C O_{3}^{-} ) ions are linked into infinite
chain
B. ( ln K H C O_{3} ), a dimer is formed by H-bonding
C ( cdot ln N a H C O_{3}, ) a dimer is formed by H-bonding
D. ( ln K H C O_{3} ), the ( H C O_{3}^{-} ) ions are linked into infinite chain
11
468 match the elements given in Column I with the properties mentioned in
Column II.
Column!
Column Il
A. Li
1. Insoluble sulphate
B. Na
2. Strongest monoacidic base
C. Ca
3. Most negative E value among alkali
metals
D. Ba
4. Insoluble oxalate
5 6souter electronic configuration
11
469 Which of the following compounds is used as drying agent?
A. Calcium Oxide
B. Gypsum
c. calcium chloride
D. None of the above
11
470 ( I_{2} ) dissolve in ( K I ) solution due to
formation of:
( mathbf{A} cdot K I_{2} ) and ( I^{-} )
B. ( K^{+} ; I^{-} ) and ( I )
( c cdot I_{3}^{-} )
D. None of the above
11
471 The function of quick lime mixture is to:
A. Absorb moisture present in sodalime
B. increase the efficiency of soda lime
C. Increase the pH of sodalime
D. Take part in reaction with NaOH
11
472 State whether the following statement is true or false.
Reactivity and reducing power decreases on going from group 1 to group 2.
A. True
B. False
11
473 Which of the following compound cannot be thermally decomposed even
at high temperature?
A. ( C s H C O_{3} )
в. ( R b_{2} C O_{3} )
( mathrm{c} cdot L i_{2} mathrm{CO}_{3} )
D. ( left(N H_{4}right)_{2} C O_{3} )
11
474 The incorrect statement(s) is/are:
A. ( M g ) cannot form complexes
B. ( B e ) can form complexes due to a very small atomic
( operatorname{size} )
C. The first ionisation potential of ( B e ) is higher than that of ( M g )
D. ( M g ) forms an alkaline hydroxide while ( B e ) forms amphoteric oxides
11
475 • 83 Tons of an element of aroup 1 participate in the transmission of nerve
signals and transport of sugars and aminoacids into cells. This element
imparts yellow colour to the flame in flame test and forms an oxide and
a peroxide with oxygen. Identify the element and write chemical
reaction to show the formation of its peroxide. Why does the element
impart colour to the flame?
oli motol must be sodium It reacts
11
476 Why whitewashing walls gives a shiny finish to the walls?
A. Because of the formation of ( M g C O_{3} )
B. Because of the formation of ( C a C O_{3} )
c. Because of the formation of ( C a(O H) )
D. None of these
11
477 In the preparation of sodium carbonate, which of the following is used as raw material?
A. Slaked lime
B. Quick lime
c. lime stone
D. Sodium hydroxide
11
478 The standard solution of sodium
hydroxide cannot be prepared by direct weighing of cold sodium hydroxide because it is :
A . a solid
B. a liquid
c. deliquescent
D. none of the above
11
479 Complete the following equation:
( N a_{2} O_{2}+2 H_{2} O rightarrow(underline{W})+H_{2} O_{2} )
( 2 K O_{2}+2 H_{2} O rightarrow(underline{X})+(underline{Y})+O_{2} )
( N a_{2} O+C O_{2} rightarrow(Z) )
A. ( W-4 N a, X-K_{2} O, Y-H_{2} O, Z-N a_{2} O_{2} )
B. ( W-4 N a, X-K_{2} O, Y-H_{2} O_{2}, Z-N a_{2} C O_{3} )
c. ( W-4 ) NaOH ( , X-2 )КОН ( , Y-H_{2} ) О ( , Z- ) Na( _{a} ) О ( _{3} ).
D. ( W-2 N a O H, X-2 K O H, Y-H_{2} O_{2}, Z-N a_{2} C O_{3} )
11
480 Out of the elements marked ( A, B, C, D, E )
( mathrm{F}, mathrm{G} ) and ( mathrm{H} ) which form superoxides?
This question has multiple correct options
( A cdot A )
B. B
( c . c )
( D cdot D )
E.
( F . F )
( G )
11
481 Which of the following is organometalic compound
A. Methyl lithium
B. Lithium methoxide
c. Lithium dimethyl amide
D. Lithium acetate
11
482 Sodium sulphate is soluble in water,
whereas barium sulphate is sparingly
soluble because:
This question has multiple correct options
A. the hydration energy of sodium sulphate is more than its lattice energy
B. the lattice energy of barium sulphate is more than its hydration energy
C. the lattice energy has no role to play in solubility
D. the hydration energy of sodium sulphate is
less than its lattice energy
11
483 A compound which can be used in
space vehicles both to a absorb ( C O_{2} )
and liberate ( boldsymbol{O}_{2} ) is:
A . ( N a O H )
в. ( N a_{2} O )
c. ( N a_{2} O_{2} )
( mathbf{D} cdot C a O+N a O H )
11
484 State whether the following statement is true or false:

The salt which is used in medicine as a
contrast medium for stomach and
intestinal ( X ) -rays is ( B a S O_{4} )

11
485 A mixture of sodium oxide and calcium
oxide are dissolved in water and
saturated with excess carbon dioxide
gas. The resulting solution is and
it contains
( mathbf{A} cdot operatorname{Basic} N a O H ) and ( C a(O H)_{2} )
B. Neutral ( N a_{2} C O_{3} ) and ( C a C O_{3} )
( mathbf{c} . ) Ваsic ( N a_{2} C O_{3} ) and ( C a C O_{3} )
D. Acidic ( N a O H ) and ( C a C O_{3} )
11
486 Arrange the following sulphates of alkaline earth metals in order of decreasing thermal stability:
( B e S O_{4}, M g S O_{4}, C a S O_{4}, S r S O_{4} )
A ( cdot B e S O_{4}>M g S O_{4}>C a S O_{4}>S r S O_{4} )
в. ( operatorname{SrSO}_{4}>operatorname{Mg} S O_{4}>operatorname{CaSO}_{4}> )Ве( S O_{4} )
c. ( operatorname{SrSO}_{4}>operatorname{CaSO}_{4}>operatorname{MgSO}_{4}>operatorname{BeSO}_{4} )
( mathrm{D} cdot operatorname{SrSO}_{4}>operatorname{CaSO}_{4}>operatorname{Be} mathrm{SO}_{4}>mathrm{MgSO}_{4} )
11
487 Which of the following reagent is used as fixer in photography?
( mathbf{A} cdot A g B r )
в. ( A g N O_{3} )
c. ( N a_{2} S_{2} O_{3} cdot 5 H_{2} O )
D. Both A and C
11
488 Q24. Explain the significance of sodium, potassium, magnesium and calcium in biological fluids.
Ana Sada
11
489 011. How would you prepare sodium silicate from silica? 11
490 The main constituents of cement are:
A. calcium oxide, silicon dioxide, aluminium oxide
B. calcium oxide, Iron oxide, sulphur dioxide
C. magnesium oxide, silicon dioxide, aluminium oxide
D. none of these
11
491 A compound ( (X) ) gives brick red flame and breaks down on heating giving
oxygen brown gas ( (A) ) and ( (B) ). Identify ( (X),(A) ) and ( (B) ) respectively
A ( cdot C aleft(N O_{3}right)_{2}, N O_{2}, C a O )
в. ( C aleft(N O_{3}right)_{2}, C a O, N O_{2} )
c. ( M gleft(N O_{3}right)_{2}, M g O, N O_{2} )
D. ( M gleft(N O_{3}right)_{2}, N O_{2}, M g O )
11
492 Looking at the alkali metals, which one would have the strongest Coulombic forces leading to the highest melting point when paired with the corresponding Halogen in the same
row?
A . Lithium
B. Sodium
c. Potassium
D. Rubidium
11
493 Cement is a mixture of:
A . calcium silicates
B. calcium aluminates
c. calcium silicates and aluminates
D. none of these
11
494 As per observation (iii) LiH is more
stable than NaH, because:
A. Due to small size of ( L i^{+} ), the lattice energy of LiH is
greater
B. Due to greater size of ( H^{-} ), the lattice energy of LiH is greater
C. LiH is more covalent than NaH
D. Due to greater size of ( N a^{+} ), the lattice energy of NaH is greater
11
495 Sodium when burnt in excess of oxygen
gives sodium oxide. If true enter 1 , else
enter 0
11
496 Explain the following phenomenon by means of balanced equation:
(a) When the solution (b) is heated,
turbidity reappears.
(b) The turbidity of solution (a) eventually disappears when continued exhaling is made through it
(c) When the solution
(b) is heated,
turbidity reappears.
11
497 Alkali metals dissolve in liquid ( N H_{3} ) then which of the following observation(s) is/are true?
A . ( H_{2} ) gas is liberated
B. Solution is blue due to the presence of solvated electrons
c. solution is conducting
D. All of the above
11
498 Calcium chloride is used as a
dehydration agent because:
A. it has a strong affinity for water
B. it has water of crystalline attached to it
c. it loses water when exposed to air
D. it has a high melting point.
11
499 Which of the following statements is not correct regarding preparation of
NaOH?
A. NaOH is prepaid by electrolysis of sodium chloride in castner-Kellner cell.
B. Sodium metal discharged at cathode combines with mercury to form sodium amalgam
c. chlorine is evolved at anode
D. Amalgam is heated to separate Na and Hg
11
500 Which one of the following has magnesium?
A. Vitamin ( B_{12} )
B. Chlorophyll
c. Haemocyanin
D. Carbonic anhydrase
11
501 Why are potassium and caesium used,
rather than lithium used in
photoelectric cells?
11
502 When magnesium burns in steam, the formulae of the products are:
A ( cdot M g(O H)_{2}, H_{2} )
( mathbf{B} cdot mathrm{MgO}, H_{2} )
с. ( M g O_{2}, H_{2} )
D. ( M g(O H)_{2}, O_{2} )
11
503 A one litre flask is full of reddish brown
bromine fumes. The intensity of brown colour of vapour will decrease appreciably on adding to the flask ( x ) number of species from the following
find ( x )
(i) Marble pieces
(ii) Animal charcoal powder
(iii) ( mathbf{C} boldsymbol{C l}_{mathbf{4}} )
(iv) ( mathbf{C} boldsymbol{S}_{2} )
(v) Water
( A cdot(3) )
B. (2)
c. (1)
( D cdot(4) )
11
504 What is the product formed when
hydrated ( C a S O_{4} ) is heated to ( 125^{circ} C )
instead of ( 200^{circ} mathrm{C} ? )
( mathbf{A} cdotleft(C a S O_{4}right) frac{1}{2} H_{2} O )
в. ( operatorname{CaSO}_{4} frac{3}{4} mathrm{H}_{2} mathrm{O} )
( mathrm{c} cdot mathrm{CaSO}_{4} )
D. ( C a O+S O_{3} )
11
505 Consider the following statement:
Both ( L i ) and ( M g ) forms hydrated
chloride.
If true enter ( 1, ) else enter 0
11
506 Due to diagonal relationship between
Be and ( A l ) :
A. both are metals
B. both are metalloids
c. both form polymeric covalent hydrides
D. none of these
11
507 . 10 Amphoteric hydroxides react with both alkalies and acids. Which of the
following Group 2 metal hydroxides is soluble in sodium hydroxide?
(a) Be(OH)2 (b) Mg(OH)2 (c) Ca(OH)2 (d) Ba(OH),
11
508 The alkali metals:
This question has multiple correct options
A. form salts like hydrides
B. posses low ionisation potential
C. have a high affinity towards non-metals.
D. have low density
11
509 Q. 36 All compounds of alkali metals are easily soluble in water but lithium
compounds are more soluble in organic solvents. Explain.
Ane Smatleet pizofli
11
11
510 Which of the following represents
calcium chlorate?
A ( cdot C a C l O_{2} )
в. ( operatorname{Ca}left(C l O_{4}right)_{2} )
c. ( C aleft(C l O_{3}right)_{2} )
D. ( C aleft(C l O_{2}right)_{2} )
11
511 The alkaline earth metal that has
greatest affinity for nitrogen is
A. sr
в. мв
( c cdot c a )
D. Ba
11
512 Calcium carbonate reacts with aqueous
( H C I ) to give ( C a C l_{2} ) and ( C O_{2} ) according
to the reactions:
( boldsymbol{C a C O}_{3(s)}+mathbf{2 H C l}_{(a q)} rightarrow boldsymbol{C a C l}_{2(a q)}+ )
( boldsymbol{C O}_{2(g)}+boldsymbol{H}_{2} ) OWhat mass of ( boldsymbol{C a C O}_{3} ) is
required to completely react with
( 25 m L ) of ( 0.75 M H C l ? )
A ( .0 .253 mathrm{g} )
B. ( 0.425 mathrm{g} )
c. ( 0.9375 mathrm{g} )
D. None of these
11
513 Calamine is used to reduce the
irritating effect of ant bite/sting because it reacts with (X) released due
to the bit /sting of ants with (Y) present in calamine. ( (mathrm{X}) ) and ( (mathrm{Y}) ) respectively
are:
A. sodium hydrogen carbonate and formic acid
B. formic acid and zinc carbonate
c. acetic acid and common salt
D. hydrochloric acid and zinc oxide
11
514 What is the correct order of thermal
stability of carbonates of alkaline earth metals?
A ( cdot B e C O_{3}>M g C O_{3}>C a C O_{3}>S r C O_{3}>B a C O_{3} )
в. ( B e C O_{3}<M g C O_{3}<C a C O_{3}<S r C O_{3}<B a C O_{3} )
c. ( B e C O_{3}C a C O_{3}>S r C O_{3}M g C O_{3}<C a C O_{3}<S r C O_{3}<B a C O_{3} )
11
515 ( boldsymbol{Y} stackrel{boldsymbol{Delta}, 205^{circ} boldsymbol{C}}{boldsymbol{C}} boldsymbol{C a S} boldsymbol{O}_{4} cdot boldsymbol{2} boldsymbol{H}_{2} boldsymbol{O} stackrel{boldsymbol{Delta}, mathbf{1 2 0}^{circ} boldsymbol{C}}{longrightarrow} boldsymbol{X} )
( X ) and ( Y ) are respectively
A. plaster of paris, dead burnt plaster
B. dead burnt plaster, plaster of paris
c. ( C a O ), plaster of paris
D. plaster of paris, mixture of gases
11
516 “Polarising power of ( L i^{+} ) ion is nearly
the same as that of ( M g^{2+} ) ion.”

Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .

11
517 The substance not likely to contain
( boldsymbol{C a C O}_{3} ) is:
A. dolamite
B. sea shell
c. calcined gypsum
D. marble statue
11
518 Q1. Why are alkali metals soft and have low melting points?
.1
1
* Low we were vuolewa *
1
11
519 Why are group I elements:
(a) univalent
(b) largely ionic
(c) strong reducing agents
(d) poor complexing agents?
(e) why do they have the lowest first
ionization energy values in their
periods?
11
520 n the given Haber process, find out ( A )
A. сао
в. ( C a(O H)_{2} )
( c cdot C a C O_{3} )
D. None of these
11
521 Which of the following statement(s) is/are incorrect?
This question has multiple correct options
A. Magnesium may be extracted by self reduction method.
B. Down’s process is used to extract magnesium from sea water.
C. Magnalium is an alloy of magnesium
D. Formula of epsom salt is ( M g S O_{4} .6 H_{2} O )
11
522 R. 22 Metallic elements are described by their standard electrode potential,
fusion enthalpy, atomic size, etc. The alkali metals are characterised by
which of the following properties?
(a) High boiling point
(b) High negative standard electrode potential
(c) High density
(d) Large atomic size
11
523 Give four uses of sodium carbonate
(washing soda)
11
524 21. Crude common salt is hygroscopic because of the
presence of impurities of
(a) CaSO4 and MgSO4
(b) CaCl, and MgCl2
(c) CaBr, and MgBr,
* (d) Ca(HCO3)2 and Mg(HCO3)2
11
525 Na Cl is dissolved in water. Which of
the following statement is correct?
A. ( N a^{+} ) is oxidised
B. ( N a^{+} ) is reduced
C. ( N a^{+} ) is hydrolysed
D. ( N a^{+} ) is hydrated
11
526 The balanced equations for : “Carbon dioxide is passed through a concentrated aqueous solution of sodium chloride saturated with
ammonia”
A ( cdot ) NaCl ( +N H_{4} O H+C O_{2} rightarrow N H_{4} C l+N a H C O_{3} )
B . ( 2 mathrm{NaCl}+mathrm{NH}_{4} mathrm{OH}+mathrm{CO}_{2} rightarrow mathrm{NH}_{4} mathrm{Cl}+2 mathrm{NaH} mathrm{CO}_{3} )
c. ( N a C l+N H_{4} O H+C O_{2} rightarrow N H_{4} C O+N a H C l_{3} )
D. ( N a C l+N H_{4} O H+C O_{2} rightarrow N H_{3}+N a C l+H_{2} C O_{3} )
11
527 Select the incorrect statement(s):
This question has multiple correct options
A. Magnesium can be burnt in the atmosphere of ( C O_{2} )
and ( S O_{2} )
B. Magnesium reacts with alkyl halides to form Grignard’s reagent
C. Out of ( M g ) and ( C a ), only ( M g ) reacts with ( N_{2} ) to form magnesium nitride
D. Calcium is less reactive than magnesium
11
528 Under what soil condition do you think a
farmer would treat the soil of his fields with quick lime (calcium oxide) or
slaked lime (calcium hydroxide) or chalk (calcium carbonate)?
11
529 Statement : If equal masses of sodium
metal and chlorine gas are allowed to
react, some sodium will be leftover after all the chlorine is used up.
Statement 2: The reaction required
twice as many atoms of chlorine as
Sodium.
A. Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1
B. Both 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
530 Q32. Which one of the following alkaline earth metal carbonates is thermally most stable?
(a) MgCo() Caco, (c) Srco; (d) BaCO3
11
531 Plaster of paris is obtained by heating gypsum at controlled-temperature.
A. True
B. False
11
532 Write the chemical formula of baking
soda.
11
533 The metallic luster exhibited by sodium is explained by :
A. diffusion of sodium ions
B. oscillations of loose electrons
c. excitation of free protons
D. existence of body centered cubic lattice
11
534 The decreasing order of the second
ionization potential of ( M g, C a ) and ( B a )
is:
A. ( M g>C a>B a )
в. ( C a>B a>M g )
с. ( B a>M g>C a )
D. ( M g>B a>C a )
11
535 Assertion
The mobility of sodium ion is lower than
that of potassium ion.
Reason
The ionic mobilities depend on the
effective radius of the ion.
Read the above assertion and reason
and choose the correct option regarding
¡t.
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
536 mole of a substance (X) was treated
with an excess of water. 2 moles of
readily combustible gas were produced along with solution which when reacted
with ( C O_{2} ) gas produced a white turbidity. The substance (X) could be:
A. ( C a )
в. ( C a H_{2} )
( mathbf{c} cdot operatorname{Ca}(O H)_{2} )
( mathrm{D} cdot mathrm{Ca}left(mathrm{NO}_{3}right)_{2} )
11
537 A metal ( M ) readily forms water-soluble
sulphate ( M S O_{4}, ) water-insoluble
hydroxide ( M(O H)_{2} ) and oxide ( M O . ) The
oxide and hydroxide are soluble in NaOH. The ( M ) is:
( A . B e )
в. ( M g )
( c . C a )
D. ( S r )
11
538 Assertion
Ether can extract LiCl from the aqueous
solution of a mixture of LiCl, NaCl and
KCI.
Reason
Hydration of ( L i^{+} ) ion is greater than that
of ( N a^{+} ) and ( K^{+} ) ions.
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
539 Which one is not the property of Lithium by which it differs from the rest of the alkali metals?
A. Extremely small size of Lithium atom
B. Greater polarizing power of Lithium ion
c. Highest electropositive character and highest ionization energy
D. Non availability of vacant d-orbitals in the valence shell
11
540 The ATP forms a complex with:
A. ( M g^{2+} )
в. ( C a^{2} )
( mathbf{c} cdot B e^{2+} )
D. ( B a^{2} )
11
541 ( N a H C O_{3} ) represent the formula of
which one of the following?
A. Sodium carbonate
B. Baking soda
c. Sodium acetate
D. washing soda
11
542 State whether the given statement is
true or false:
The above reaction proceeds better with NaF than with KF.
[
>c-c l+M F longrightarrow->c-F+M C l
]
11
543 Beryllium and aluminium exhibit many properties which are similar but the two elements differ in
A. forming covalent halides
B. forming polymeric halides
c. exhibiting maximum covalency in compounds
D. exhibiting amphoteric nature in their oxides
11
544 The element that does NOT form acidic
oxide is :
A. carbon
B. phosphorus
c. chlorine
D. barium
11
545 State whether the given statement is true or false:
( K O_{2}, B a O_{2}, N a_{2} O_{2} ) are superoxides.
A. True
B. False
11
546 Anhydrone is a common name given to:
( mathbf{A} cdot M gleft(O H_{2}right) cdot 6 H_{2} O )
B. ( M g S O_{4} .7 H_{2} O )
( mathrm{c} cdot M g(O H) cdot 7 mathrm{H}_{2} mathrm{O} )
D ( cdot_{M g}left(C l O_{4}right)_{2} )
11
547 Assertion
Among the second group peroxides, barium peroxide is thermally most stable.
Reason
Positive charge density is maximum for
( B a^{2+} ) among group II cations
A. The Assertion is True, Reason is True; Reason is a correct explanation for Assertion
B. The Assertion is True, Reason is True; Reason is not a correct explanation for Assertion
C. Assertion is True, Reason is False
D. Assertion is False, Reason is True.
11
548 State True or False.
Caphosol a supersaturated calcium phosphate solution is used in the prevention and treatment of oral mucositis caused by chemotherapy or radiotherapy.
A. True
B. False
11
549 Consider the following reactions:
( boldsymbol{C a C O}_{3} rightarrow boldsymbol{C a O}+boldsymbol{C O}_{2} )
( boldsymbol{E}+boldsymbol{C O}_{2} rightarrow boldsymbol{F} )
( N a C l+F rightarrow A+N a H C O_{3} )
where ( boldsymbol{E} ) and ( boldsymbol{F} ) are respectively:
A. ( N H_{4} H C O_{3} ) and ( N H_{4} C l )
B. ( N a O H ) and ( N a H C O_{3} )
c. ( c a(O H)_{2} ) and ( C aleft(H C O_{3}right)_{2} )
D. none of the above
11
550 Which impurity (as a salt) is associated with table salt obtained
from sea-water?
A. ( N a H C O_{3} )
B. ( M g C O_{3} )
c. ( M g C l_{2} )
D. NaI
11
551 Write uses of baking powder
( left(N a H C O_{3}right) )
11
552 Choose the correct answer form the
alternatives given. Which of the following compounds are not arranged in correct order as indicated?
A ( cdot operatorname{Sr} C l_{2}<C a C l_{2}<M g C l_{2}<B e C l_{2} ) (increasing extent
of hydrolysis)
B. ( S r C l_{2}<C a C l_{2}<M g C l_{2}<B e C l_{2} ) (increasing lattice energy)
( mathrm{c} cdot mathrm{CaSO}_{4}<mathrm{MgSO}_{4}<mathrm{BeSO}_{4} ) (increasing stability)
D. ( B e(O H)_{2}<M g(O H)_{2}<C a(O H)_{2} ) (increasing solubility)
11
553 The chemical name of baking soda is:
A. sodium hydrogen carbonate
B. sodium carbonate
c. sodium bisulphite
D. none of the above
11
554 The least electro positive alkali metal
is:
A. Sodium
B. Lithium
c. Potassium
D. Caesium
11
555 Setting of cement is:
A. exothermic reaction
B. endothermic reaction
C. neither endothermic nor exothermic
D. None of the above
11
556 Describe in details the industrial
electrolysis of sodium chloride. Comment on the purity of the products.
11
557 Which of the following halides of calcium is insoluble in water?
A. ( C a C l_{2} )
в. ( C a I_{2} )
c. ( C a F_{2} )
D. ( C a B r_{2} )
11
558 “BeO has hexagonal ZnS structure.” Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
559 Which one of the following pairs do not impart colour to the flame?
A. ( B e C l_{2} ) and ( S r C l_{2} )
в. ( B e C l_{2} ) and ( M g C l_{2} )
c. ( C a C l_{2} ) and ( B a C l_{2} )
D. ( B a C l_{2} ) and ( S r C l_{2} )
11
560 Which of the following is not a use of baking soda?
A. In medicines as antacid
B. As a component of baking powder
c. In removing permanent hardness of water
D. In fire extinguishers
11
561 ( N a O H ) form hydrated salts.
A. True
B. False
11
562 ( boldsymbol{C a}left(boldsymbol{H}_{2} boldsymbol{P} boldsymbol{O}_{4}right)_{2} ) in baking powder:
A. Behaves as an acid in moist condition and decomposes ( N a H C O_{3} ) to give ( C O_{2} )
B. Behave as a base in moist condition and gives ( H_{3} P O_{4} )
c. Behaves as binder
D. Behaves as a filler
11
563 Give reasons:
When the gas formed on heating limstone is passed through freshly prepared lime water, the lime water turns milky.
11
564 ( boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4} ) is treated with marble, it
releases which
A ( cdot C O_{2}, ) turns lime water milky
B. ( H_{2} ), burns with a pop sound
c. ( O_{2} ), rekindles a burning spirit
D. none of the above
11
565 In ( K O_{2}, ) the nature of oxygen species
and the oxidation state of oxygen atom
are, respectively.
A. Superoxide and -1
B. superoxide and – ( frac{1}{2} )
c. peroxide and ( -frac{1}{2} )
D. Oxide and -2
11
566 Match compounds given in (X) with their uses in ( (Y): )
( X )
A. ( mathrm{Na}_{2} mathrm{CO}_{3} )
I glass
B. ( mathrm{Na}_{2} mathrm{SO}_{3} )
II bleach
C. ( mathrm{NaOH} )
III ( mathrm{SO}_{2} ) absorber
D. NaOCI
IV detergent
A . A-IV, B-I, C-III, D-II
B. A-I, B-III, C-IV, D-1 ||
c. A-II, B-IV, C-I, D-III
D. A-III, B-II, C-IV, D-1
11
567 Which of the following objects are soluble in water?
A. Fodder
B. Table salt
c. chalk powder
D. clay
11
568 Q. 39 Why do beryllium and magnesium not impart colour to the flame in the
flame test?
11
569 Largest difference in radii is found in
which of the following pair?
A. ( L i, N a )
в. ( N a, K )
c. ( K, R b )
D. ( R b, C s )
11
570 State the chemical property in each case on which the following uses of baking soda are based
(i) As an antacid
(ii) As a constituent of baking powder Give the chemical for baking soda
11
571 A solution of a substance ‘X’ is used for
white washing.

Write the reaction of the substance ‘X’
named in given with water

11
572 A solution of caustic soda (NoOH) in
water or when fused,conducts electric current. What is the similarity in these two cases?
11
573 The metal which can displace hydrogen from acid is:
A . silver
B. calcium
c. mercury
D. gold
11
574 A mixture of ( L i_{2} C O_{3} ) and ( K_{2} C O_{3} ) on
strong heating gave 0.25 mole of ( C O_{2} )
The mole ( % ) of ( L i_{2} C O_{3} ) and ( C O_{2} ) in the
mixture is :
( begin{array}{lll}text { A } cdot L i_{2} C O_{3}: 25 % & K_{2} C O_{3}: 75 %end{array} )
B . ( L i_{2} C O_{3}: 75 % quad K_{2} C O_{3}: 25 % )
( mathrm{c} cdot L i_{2} C O_{3}: 60 % quad K_{2} C O_{3}: 40 % )
D. ( L i_{2} C O_{3}: 40 % quad K_{2} C O_{3}: 60 % )
11
575 UULIL PIULUIELLIC LES ICICI LITLUL IILUUIII.
Q10. When alkali metal dissolves in liquid ammonia, the solution can acquire different colours.
Explain the reason for this type of colour change.
11
576 Which of the following metals can form nitride with nitrogen?
A ( . L i )
в. ( N a )
( mathrm{c} cdot M g )
D. ( C a )
11
577 State True or False.
( B e H_{2} ) is an ionic hydride.
A. True
B. False
11
578 In what ways lithium shows similarities to magnesium in its chemical behaviour? 11
579 . 2 Alkali metals react with water vigorously to form hydroxides and dihydrogen.
Which of the following alkali metals reacts with water least vigorously?
(a) Li
(b) Na
(c) K
(d) Cs
11
580 Sodium carbonate is used to:
A. preserve pickles, fish
B. baking industry
c. manufacture borax
D. all of above
11
581 Why is tartaric acid added into baking soda to get baking powder? 11
582 Lithopone is mixture of :
A. ( Z n C O_{3}, B a C O_{3} )
в. ( Z n S, N a_{2} S O_{4} )
( mathrm{c} cdot Z n S O_{4}, B a S O_{4} )
D. ( Z n S, ) BaSO( _{4} )
11
583 Compare and contrast the chemistry of group 1 metals with that of group 2 metals with respect to oxides. 11
584 Which of the following will have the largest size in water?
( mathbf{A} cdot R b^{-} )
В. ( N a^{+} )
( c cdot K^{+} )
D. ( L i^{+} )
11
585 Highly pure dilute solution of sodium in liquid ammonia:
This question has multiple correct options
A. shows blue color
B. exhibits electric conductivity
c. produces sodium amide
D. produces hydrogen gas
11
586 Halides of alkaline earth metals from
hydrates such as, ( M g C l_{2} cdot 6 H_{2} O, C a C l_{2} )
( 6 H_{2} O, B a C l_{2} cdot 2 H_{2} O, ) and ( S r C l_{2} )
( 2 H_{2} O )
This shows that halides of group II elements:
A. are hygroscopic in nature
B. act as dehydrating agents.
c. can absorbs moisture from air
D. cannot absorbs moisture from air
11
587 Why lime has been used in mortar (a
lime, sand and water paste) in building houses, etc. for several thousand years?
11
588 The set representing the correct order of
the first ionization potential is:
A. ( K>N a>L i )
в. ( B e>M g>C a )
c. ( B>C>N )
D. ( G e>S i>C )
11
589 Which of the following changes occurs
when excess of ( C O_{2} ) gas is passed into
a clear solution of lime water?
A . A white precipitate containing both ( C a C O_{3} ) and ( C aleft(H C O_{3}right)_{2} ) is formed
B . Initially a white precipitate of ( C a C O_{3} ) is formed which changes into soluble ( C aleft(H C O_{3}right)_{2} ) on passing excess ( C O_{2} ) gas
C. A white precipitate of ( C aleft(H C O_{3}right)_{2} ) is formed
D. A white precipitate of ( C a C O_{3} ) is formed
11
590 Common name of sodium chloride is
salt.
11
591 Which one of the following statement(s)
is/are true about ( operatorname{Ca}(boldsymbol{O H})_{2} ) ?
This question has multiple correct options
A. It is used in the preparation of bleaching powder
B. It is a light blue solid
c. It is used in chromatography
D. Its solution in water is called lime water
11
592 ( H C l ) is dried by passing through ( C a O )
A. True
B. False
11
593 22
Q26. Comment on each of the following observations:
(a) The mobilities of the alkali metal ions in aqueous solution are Lit < Nat <kt < Rb+ < Cst
(b) Lithium is the only alkali metal to form a nitride directly.
(c) E for M2+ (aq) + 2e → M(s) (where M = Ca, Sr, or Ba) is nearly constant.
11
594 Nuclear attraction is often the deciding control factor for the association of
natural molecules to
a given metal ion. Which one of the
following represents the correct order of stability of the ions? ( left[boldsymbol{B e}left(boldsymbol{H}_{2} boldsymbol{O}right)_{4}right]^{2+},left[boldsymbol{M} boldsymbol{g}left(boldsymbol{H}_{2} boldsymbol{O}right)_{4}right]^{2+}, boldsymbol{C} boldsymbol{a}left(boldsymbol{H}_{2} boldsymbol{C}right. )
( left.left.mathbf{A} cdotleft[B eleft(H_{2} Oright)_{4}right]^{2+}>S rleft(H_{2} Oright)_{4}right]^{2+}right]>left[M gleft(H_{2} Oright)_{4}right]^{2+}> )
( left[C aleft(H_{2} Oright)^{4}right]^{2+} )
B . ( left[C aleft(H_{2} Oright)_{4}right]^{2+}>left[M gleft(H_{2} Oright)_{4}right]^{2+}>left[B eleft(H_{2} Oright)_{4}right]^{2+}> )
( left.operatorname{Sr}left(H_{2} Oright)_{4}right]^{2+} )
C ( cdotleft[operatorname{Sr}left(H_{2} Oright)_{4}right]^{2+}>left[C aleft(H_{2} Oright)_{4}right]^{2+}>left[M gleft(H_{2} Oright)_{4}right]^{2+}> )
( left[operatorname{Be}left(H_{2} Oright)_{4}right]^{2+} )
D. ( left[B eleft(H_{2} Oright)_{4}right]^{2+}>left[M gleft(H_{2} Oright)_{4}right]^{2}>left[C aleft(H_{2} Oright)_{4}right]^{2+}> )
( left.operatorname{Sr}left(H_{2} Oright)_{4}right]^{2+} )
11
595 Which oxide is formed when potassium is heated in excess of oxygen?
( A cdot K_{2} O )
B. KO
( mathrm{c} cdot mathrm{K}_{2} mathrm{O}_{2} )
D. ( K O_{2} )
11
596 Which of the following has maximum ionization energy?
A ( cdot B a rightarrow B a^{+}+e^{-} )
B. ( B e rightarrow B e^{+}+e^{-} )
c. ( C a rightarrow C a^{2+}+2 e^{-} )
D. ( M g rightarrow M g^{2+}+2 e^{-} )
11
597 The characteristic not related to alkali
metals is :
A. their ions are isoelectronic with noble gases.
B. metallic character
c. low electronegativity.
D. high ionization energy.
11
598 Q30. Which of the alkali metal is having least melting point?
(a) Na (6) K (c) Rb (d) Cs
11
599 Q1. What are the common physical and chemical features of alkali metals? 11
600 Q. 49 The stability of peroxide and superoxide of alkali metals increase as we
go down to group. Explain giving reason.
Thootability of
11
601 Gypsum is added to Portland cement to:
A. fasten the process of setting
B. slow down the process of setting
C. improve the colour of the cement
D. increase the melting point of cement
11
602 Anhydrous ( M g C l_{2} ) can be prepared by
heating ( M g C l_{2} cdot 6 H_{2} O: )
A. In a current of dry HCl gas
B. With carbon
c. Until it fuses
D. With lime
11
603 Find correct order of polarising power
between ( A l^{+2} ) and ( B e^{+2} ) (both shows
digonal relationship):
A ( cdot B e^{+2}>A l^{+2} )
B. ( B e^{+2}>A l^{+2} )
D. ( B e^{+2}=A l^{+2} )
11
604 A compound ( X ) on heating gives a colourless gas. The residue is dissolved
in water to obtain ( Y . ) Excess ( C O_{2} ) is
passed through aqueous solution of ( boldsymbol{Y} )
when ( Z ) is formed. ( Z ) on gentle heating
gives back ( X . ) The compound ( X ) is:
A ( cdot operatorname{Ca}left(mathrm{HCO}_{3}right)_{2} )
в. ( C a C O_{3} )
с. ( _{text {NaH } mathrm{CO}_{3}} )
D. ( N a_{2} C O_{3} )
11
605 Caustic soda is chemically sodium hydroxide ( (N a O H) )
A. True
B. False
11
606 What is requirement for sodium in milligrams per day?
A . 400
B. 500
( c cdot 600 )
D. 700
11
607 Q. 45 Assertion (A) Beryllium carbonate is kept in the atmosphere of carbon
dioxide.
Reason (R) Beryllium carbonate is unstable and decomposes to give
beryllium oxide and carbon dioxide.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) Both A and Rare not correct
(d) A is not correct but R is correct
nnn duinto omall size and high polarising power of Be+
11
608 As the alkaline earth metals (except Be) tend to lose their valence electrons
readily they act as:
A. weak oxidising agent
B. weak reducing agent
C. strong oxidising agent
D. strong reducing agent
11
609 Which of the following are exothermic processes?
(i) The reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)
( A cdot ) (i) and (ii)
B. (ii) and (iii)
c. (i) and (iv)
D. (iii) and (iv)
11
610 The correct increasing order of melting point of alkali metal carbonates is:
A ( cdot C s_{2} C O_{3}<N a_{2} C O_{3}<K_{2} C O_{3}<R b_{2} C O_{3}< )
( L i_{2} C O_{3} )
в. ( L i_{2} C O_{3}<N a_{2} C O_{3}<K_{2} C O_{3}<R b_{2} C O_{3}< )
( C s_{2} C O_{3} )
3
c. ( L i_{2} C O_{3}<R b_{2} C O_{3}<K_{2} C O_{3}<N a_{2} C O_{3}< )
( C s_{2} C O_{3} )
D. None of these
11
611 Reaction of ( boldsymbol{O}_{2} ) is faster with ( boldsymbol{C} boldsymbol{a} ) or ( boldsymbol{M} boldsymbol{g} ) ?
( mathbf{A} cdot M g )
в. ( C a )
c. Equally react
D. Do not react
11
612 (B) and (C) are:
A ( cdot C a O, C a(O H)_{2} )
в. ( C a(O H)_{2}, C a C O_{3} )
c. ( operatorname{CaCO}_{3}, operatorname{Ca}(O H)_{2} )
D. ( C a(O H)_{2}, C a O )
11
613 Write the balanced chemical equations for the following reactions and identify
the type of reaction:
limestone is heated strongly to form quicklime and carbon dioxide gas is evolved
11
614 Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
A ( cdot operatorname{CaSO}_{4} )
в. ( B e S O_{4} )
c. ( B a S O_{4} )
D. ( operatorname{sr} operatorname{sO} 4 )
11
615 Assertion
( N a C l ) is not a conductor of electricity
in solid state whereas it does conduct
electricity in aqueous solution as well as in molten state.
Reason
In solid ( N a C l, ) the ions have fixed positions in the lattice structure and there are no free ions but in aqueous
solution or molten state, the ions can move freely and thus conduct electricity.
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
616 One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is:
A . acetic acid
B. oxalic acid
c. carbonic acid
D. tartaric acid
11
617 State True or False.
Tricalcium phosphate is used as a nutritional supplement and occurs naturally in cow milk.
A. True
B. False
11
618 Alkaline earth metals are :
A. reducing agent
B. dehydrating agent
c. amphoteric
D. oxidising agent
11
619 In manufacture of sodium carbonate
from Solvay (or ammonia soda) process
the raw material used is :
A . NaOH
в. ( N a_{2} S O_{4} )
c. Naci
D. ( operatorname{NaH} mathrm{CO}_{3} )
11
620 The single-bonded metallic radius of sodium is 157 pm. Assume that the increment between radii of different
magnitudes is 60 pm. The ionic radius
( N a^{+} ) in ( mathrm{pm} ) is ( (90+x) . ) Find ( x )
11
621 The correct increasing order of basic nature among Be, Mg, Ca and Sr is :
A. ( B e<C a<M g<S r )
в. ( B e<M g<S r<C a )
c. ( B e<M g<C a<S r )
( mathrm{D} cdot mathrm{Ca}<mathrm{Sr}<mathrm{Be}<mathrm{Mg} )
11
622 The violet flame shown by potassium in Bunsen flame is due to jumping of the electron from :
( A cdot 1 s operatorname{to} 4 p )
B. 1s to 5p
( c cdot 4 p operatorname{tos} 4 s )
D. ( 5 p ) to 4 s
11
623 7. Alkaline earth metals are
(a) more reactive
(c) more oxidizing
(b) less reducing
(d) less basic than alkali metals
11
624 ( boldsymbol{E}^{circ} ) for ( boldsymbol{M}^{2+}(boldsymbol{a} boldsymbol{q})+boldsymbol{2} boldsymbol{e}^{-} rightarrow boldsymbol{M}(boldsymbol{s}) )
(where ( M=C a, S r text { or } B a) ) is nearly
constant.
11
625 Q7. In what ways lithium shows similarities to magnesium in its chemical behaviour?
Ane
G Both
bit teformitidos
11
626 Assertion
The metals of group 2 (except Be) form
ionic compounds.
Reason
Electropositive character and the
reducing property increase on moving
down the group.

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
627 What is the correct formula for calcium
chloride?
A. ( C a_{2} C l_{2} )
B. ( C a C l )
c. ( operatorname{caCl}_{2} )
D. ( C a C l_{3} )
E ( . C a_{2} C l )
11
628 In electrolysis of sodium hydroxide solution:
A. hydrogen is discharged at cathode.
B. hydrogen is discharged at anode
c. sodium is liberated at anode
D. no hydrogen is liberated
11
629 Select the correct statement
regarding hydrides of ( L i ) and ( B e )
( mathbf{A} cdot operatorname{Both} L i H ) and ( B e H_{2} ) are ionic.
B. ( L i H ) is ionic while ( B e H_{2} ) is covalent.
C . Both ( L i H ) and ( B e H_{2} ) are covalent.
D. ( L i H ) is covalent while ( B e H_{2} ) is ionic.
11
630 Sulphate of an alkaline earth metal which crystalizes without water of hydration is?
( A cdot B e^{2} )
в. ( M g^{2+} )
c. ( C a^{2+} )
( D cdot S r^{2} )
11
631 Which metal plays an important role in neuromuscular functions,
interneuronal transmissions, cell
membrane integrity and blood coagulation?
( A cdot B e )
в. Мв
( c cdot c a )
D. Ba
11
632 Which of the following does not
illustrate the anomalous properties of
Li?
A. The m.p. and b.p. of ( L i ) are comparatively high
B. ( L i ) is much softer than the other I group metals
C . ( L i ) forms a nitride ( L i_{3} N ) unlike group I metals
D. The ion of ( L i ) and its compounds are more heavily hydrated than those of the rest of the group
11
633 If ( Q ) (alkali metal) reacts with fluorine and oxygen, the molecular formula of fluoride and oxide respectively are:
A. ( Q F_{3}, Q_{2} O_{3} )
в. ( Q F, Q_{2} O )
( mathbf{c} cdot Q F_{2}, Q O )
D. None of these
11
634 Gypsum is added to clinker during
cement manufacturing to:
A. Decrease the rate of setting of cement
B. Bind the particles of calcium silicate
C. Facilitate the formation of colloidal gel
D. All of the above
11
635 Match the following items in column I
with the corresponding items in column
( | )
Column I
Portland
(i) ( N a_{2} C O_{3} cdot 10 H_{2} O )
(A) ( quad ) cement ingredient
castner
(ii)
[
M gleft(H C O_{3}right)_{2}
]
(B) ( quad ) Keller process
(iii) ( quad N a O H ) Solvay
(C) process
Temporary
( begin{array}{llll}text { (iv) } & mathrm{Ca}_{3} mathrm{Al}_{2} mathrm{O}_{6} & text { (D) } & text { hardness }end{array} )
A ( cdot(i) rightarrow(C) ;(i i) rightarrow(B) ;(i i i) rightarrow(D) ;(i v) rightarrow(A) )
B . ( (i) rightarrow(C) ;(i i) rightarrow(D) ;(i i i) rightarrow(B) ;(i v) rightarrow(A) )
c. ( (i) rightarrow(D) ;(i i) rightarrow(A) ;(i i i) rightarrow(B) ;(i v) rightarrow(C) )
D. ( (i) rightarrow(B) ;(i i) rightarrow(C) ;(i i i) rightarrow(A) ;(i v) rightarrow(D) )
11
636 Correct order of stability of group IIA
metal carbonates is :
( mathbf{A} cdot M g C O_{3}>C a C O_{3}>S r C O_{3}>B a C O_{3} )
B. ( B a C O_{3}>S r C O_{3}>C a C O_{3}>M g C O_{3} )
( mathbf{c} cdot operatorname{Sr} C O_{3}>B a C O_{3}>C a C O_{3}>M g C O_{3} )
( mathrm{D} cdot mathrm{CaCO}_{3}>mathrm{MgCO}_{3}>mathrm{BaCO}_{3}>mathrm{SrCO}_{3} )
11
637 If ( C a O ) caustic soda then which of the
following option is correct?
A ( cdot M gleft(C r O_{4}right)_{2}: ) Refractory metal
B. ( C a H_{2} ) :Radioactive element
c. Radium: Do not impart any colour
D. ( M g O: ) constituent of sorel cement
11
638 Which of the following cannot react with NaOH?
( A . B e )
в. ( F e )
c. ( A l )
D. Zn
11
639 Metallic sodium is used as a drying
agent for:
This question has multiple correct options
A. chloroform
B. cyclohexane
c. diispropyl ether
D. diethylamine
11
640 Chlorophyll, the green component of plants contains:
A ( cdot C a^{2} )
B. ( B e^{2} )
c. ( M g^{2+} )
D. ( B a^{2} )
11
641 Q28. Write balanced equations for reactions between.
(a) Na, o, and water
(b) KO, and water
(c) Na, and CO,
11
642 Discuss the various reactions that
occur in the Solvay process.
11
643 Setting of plaster of paris involves:
A. oxidation with atmospheric oxygen
B. combination with atmospheric ( C O_{2} )
c. dehydration
D. hydration to yield another hydrate
11
644 Chemical formula of washing soda is:
A. ( N a_{2} C O_{3} )
в. ( N a_{2} C O_{3} .10 H_{2} O )
c. ( N a_{2} C O_{3} .5 H_{2} O )
D. ( N a_{2} S O_{4} .10 H_{2} O )
11
645 Q19. Draw the structure of (i) BeCl, (vapour), (ii) BeCl, (solid). 11
646 In the presence of cobalt chloride
( left(mathrm{CoCl}_{2}right), ) bleaching powder decomposes
to form:
( A cdot C a C O_{3} )
в. ( C a O C l )
( mathrm{c} cdot mathrm{Cl}_{2} mathrm{O}_{8} )
D. ( mathrm{CaCl}_{2} )
11
647 The polarising power of ( M g^{2+} ) is nearly
same as that of:
A ( cdot L i )
в. ( B a^{2} )
( mathrm{c} cdot A l^{3} )
D. all of the above
11
648 “Na and Mg are also called bridge
element since it links Group IA and Group IB”.

State whether the above statement is
true or false.

11
649 Identify ( (A) ) and ( (B) ) in the following
sequence of reactions.
( boldsymbol{S} boldsymbol{n} boldsymbol{C l}_{2}+boldsymbol{2} boldsymbol{N} boldsymbol{a} boldsymbol{O} boldsymbol{H} rightarrow )
( (boldsymbol{A})(boldsymbol{w} boldsymbol{h} i boldsymbol{t} e boldsymbol{p} boldsymbol{p} boldsymbol{t}) frac{N a O boldsymbol{H}}{(e x c e s s)}(boldsymbol{B}) )
A ( cdot operatorname{Sn}(O H)_{2}, N a_{2} operatorname{Sn} O_{3} )
B. ( operatorname{Sn}(O H)_{2}, N a_{2} S n O_{2} )
c. ( operatorname{Sn}(O H)_{2}, N a_{2} operatorname{Sn}(O H)_{6} )
D. ( operatorname{Sn}(O H)_{2} ), no effect
11
650 010. Give the chemical formula of Epsom salt. 11
651 Q8. Explain why can alkali and alkaline earth metals not be obtained by chemical reduction method.
bottom
inente and reducing
11
652 Identify ( (A),(B) ) and ( (C) )
( mathrm{Na}_{2} mathrm{SO}_{4}+ ) carbon ( longrightarrow(A) frac{mathrm{Na}_{2}left[mathrm{Fe}(mathrm{CN})_{5} mathrm{NO}right]}{longrightarrow}(B) ) (purple)
[
mid mathrm{CdCO}_{3}
]
( mathbf{A} cdot(A): N a_{2} S )
(B) ( : N a_{2}left[F e(N C)_{5} N O Sright] )
( (mathrm{C}): mathrm{CdO} )
B. (A): ( N a O_{2} )
(B): ( N a_{2}left[F e(C N)_{5} N O Sright] )
( (mathrm{C}): C d S )
( mathbf{C} cdot(A): N a_{2} S )
(B): ( N a_{2}left[F e(C N)_{5} N O Sright] )
( (mathrm{C}): mathrm{Cd} S )
( mathbf{D} cdot(mathrm{A}): N a_{2} O )
(В) : ( N a_{2}left[F e(N C)_{5} N O Sright] )
( (mathrm{C}): P b S )
11
653 um resembles magnesium in some of its properties. Mention two
such properties and give reasons for this resemblance.
oomblanca
11
654 Caustic soda is the common name for:
( mathbf{A} cdot M g(O H)_{2} )
в. КОН
( mathbf{c} cdot C a(O H)_{2} )
D. ( N a O H )
11
655 Which among the following statements
is incorrect for magnesium metal?
A. It burns in oxygen with a dazzling white flame
B. It reacts with cold water to form magnesium oxide and evolves hydrogen gas
C. It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas
D. It reacts with steam to form magnesium hydroxide and evolves hydrogen gas
11
656 Name the carbonate which is not
decomposed by heating? This question has multiple correct options
A. Sodium carbonate
B. Potassium carbonate
c. Magnesium carbonate
D. None of these
11
657 50 A tetravalent element forms monoxide and dioxide with oxygen. When
air is passed over heated element (1273 K), producer gas is obtained.
Monoxide of the element is a powerful reducing agent and reduces ferric
oxide to iron.
Identify the element and write formulae of its monoxide and dioxide.
Write chemical equations for the formation of producer gas and
reduction of ferric oxide with the monoxide.
11
658 Sodium hydride ( (N a H) ) when dissolved
in water produces:
A . acidic solution
B. basic solution
c. neutral solution
D. cannot be predicted
11
659 The process associated with sodium carbonate manufacture is known as
A. Chamber
B. Haber
c. LeBlanc
D. castner
11
660 What is the oxidation state of ( K ) in ( K O_{2} )
( ? )
A . -1
B. -2
( c cdot+1 )
D. 0
11
661 Q31. Which one of the following alkali metals give hydrated salts?
(a) Li (b) Na (c) K (d) Cs
11
662 What is the natural source of ( N a_{2} C O_{3} ? )
A. Nitre
B. Chile salt peter
c. Dolomite
D. Trona
11
663 A cois
B. Happy Father’s Day
( c )
D.
11
664 When ( C O_{2} ) is bubbled through a solution of barium peroxide in water
then:
A. carbonic acid is formed
B. ( O_{2} ) is released
( mathrm{c} cdot mathrm{H}_{2} mathrm{O}_{2} ) is formed
D. no reaction occurs
11
665 What is the role of slaked lime and
animal charcoal in the manufacture of
sugar from sugarcane?
11
666 A covalent chloride is :
A ( cdot B e C l_{2} )
B. ( N a C l )
c. ( M g C l_{2} )
D. ( C a C l_{2} )
11
667 ( ” L i_{2} C O_{3} ) and ( N a_{2} C O_{3} ) are
thermally stable.” Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
11
668 Q21. What is soda ash? 11
669 Na ( 0 . H ) can also be prepared by electrolysis of aqueous ( N a C l . ) Amount of ( N a O H ) formed when ( 0.445 L ) of
( N a C l(a q) ) is electrolysed for 137 s with a current of ( 1.08 A ) is ( 0.06 g . ) The pH of this solution is :
A . 11.70
B. 11.53
c. 11.83
D. data is incomplete
11
670 To an acidified dichromate solution, a
pinch of ( N a_{2} O_{2} ) and ether is added and
shaken.What is observed?
A. Deep violet colour
B. Red colour changing to green
C. AgF is insoluble, others are soluble
D. All are insoluble
11
671 NaOH is not produced in:
A. Nelson Cell method
B. Downs process
c. castner kellners method
D. Causticising process
11
672 A solid compound ‘X’ on heating gives
( C O_{2} ) gas and a residue. The residue
mixed with water forms ‘Y’. On passing
an excess of ( C O_{2} ) through ‘Y’ in water, a clear solution ‘Z’ is obtained. On boiling
Z’, compound ‘X’ is reformed. The compound ‘X’ is :
A ( cdot C aleft(H C O_{3}right)_{2} )
в. ( C a C O_{3} )
c. ( N a_{2} C O_{3} )
D. ( K_{2} C O_{3} )
11
673 The purpose of exhaust system in lime kilns where the decomposition of limestone takes place is to:
A. drive away, ( C O_{2} ) gas and make the reaction proceed for completion.
B. reduce the temperature of the reaction
c. to make the reaction attain equilibrium in less time
D. all the above
11
674 Chemical formula of baking soda is:
A. ( M g S O_{4} )
в. ( N a_{2} C O_{3} )
c. ( N a H C O_{3} )
D. ( M g C O_{3} )
11
675 All alkali metals dissolve in anhydrous liquid ammonia to give a blue color solution. It is the ammoniated electron
which is responsible for the blue color of the solution, and the electrical conductivity is due to ammoniated
cation, ( left[Mleft(N H_{3}right)_{x}right]^{+} ) as well as the
ammoniated electron, ( left[eleft(N H_{3}right)_{y}right]^{-} ) values of ( x ) and ( y ) depend on the extent of
solvation by ( N H_{3} . ) Dilute solutions are
paramagnetic due to free ammoniated electrons.
What happens if alkali metals are allowed to react with concentrated
liquid ammonia?
A. Paramagnetic character of solvated electrons is retained.
B. Solvated electrons associate to form electron-pairs and paramagnetic character decreases
c. Reducing character is increased.
D. Reducing character is not affected.
11
676 Out of ( B e^{2+}, M g^{+} ) and ( C a, B e^{2+} ) has
maximum IE.
If true enter 1 , else enter 0 .
11
677 ( boldsymbol{X}+boldsymbol{C}+boldsymbol{C l}_{2} stackrel{text { High Temp. }}{boldsymbol{Y}} boldsymbol{H}+boldsymbol{C O} )
( boldsymbol{Y}+mathbf{2} boldsymbol{H}_{2} boldsymbol{O} rightarrow boldsymbol{Z}+mathbf{2} boldsymbol{H} boldsymbol{C l} )
Compound Y is found in polymeric
structure and is an electron deficient
molecule. The compound Y is:
A. ( B e O )
в. ( B e C l_{2} )
( mathbf{c} cdot B e(O H)_{2} )
D. ( B e O . B e(O H)_{2} )
11
678 The single-bonded metallic radius of sodium is 157 pm. Assume that the increment between radii of different
magnitudes is 60 pm.The van der Waals’ radius ( N a ) in ( mathrm{pm} ) is ( (209+x) )
Find value of ( boldsymbol{x} )
11
679 The magnetic quantum number of the valence electron of sodium is:
A . 2
B. 3
c. 1
( D )
11
680 The chemical formula of plaster of paris
is:
A ( cdot C a S O_{4} cdot 2 H_{2} O )
в. ( operatorname{CaSO}_{4} )
( mathrm{c} cdot mathrm{CaSO}_{4} cdot mathrm{H}_{2} mathrm{O} )
( ^{mathrm{D}} cdot_{C a S O_{4}} cdot frac{1}{2} H_{2} O )
11
681 On dissolving smaller (less than 3M) amount of sodium metal in liquid ammonia at low temperature, which
one of the following does not occur?
A. Blue coloured solution is obtained
B. Ammoniated ( N a^{+} ) ions are formed in the solution.
c. Liquid ammonia becomes good conductor of electricity
D. Liquid ammonia remains diamagnetic.
11
682 Assertion
Alkali metals dissolves in liquid ammonia to give blue solution
Reason
Alkali metals in liquid ammonia give solvated species of the type ( left[mathbf{M}left(mathbf{N} mathbf{H}_{3}right)_{mathbf{n}}right]^{+}(mathbf{M}= ) alkali metals)
A. Both Assertion and Reason are correct and the Reason is the correct explanation of the Assertion
B. Both Assertion and Reason are correct but the Reason is not the correct explanation of the Assertion
c. The Assertion is correct but the Reason is incorrect
D. The Assertion is incorrect but the Reason is correct
11
683 Final setting time of cement should not be more than:
A. 1 hour
B. 2 hours
c. 5 hours
D. 10 hours
11
684 What is the correct formula for lithium
fluoride?
A . ( L i F )
в. ( L i_{2} F_{2} )
( mathbf{c} cdot L i_{3} F_{9} )
D. ( L i F_{7} )
E ( . L i_{7} F_{19} )
11
685 In a bakery, baking powder was not added while preparing cake. The cake obtained was hard and small in size.
What is the reason for this?
11
686 The substance known as soda ash is
( N a_{2} C O_{3} )
A. True
B. False
11
687 Anhydrous magnesium chloride is obtained by heating the hydrated salt with dry
A. HCl.
в. Nacı
( c cdot ) both
D. none
11
688 Mg is present in
A . Chlorophy
B. Haemoglobin
c. Vitamin-12
D. Vitamin-B
11
689 When ( L i N O_{3} ) is heated, it gives oxide,
( boldsymbol{L} boldsymbol{i}_{2} boldsymbol{O}, ) whereas other alkali metal
nitrates decompose to give corresponding:
A . nitrite
B. peroxide
c. both nitrite and oxide
D. none of these
11
690 The constituent present in baking powder is:
A. sodium benzoate
B. acetic acid
c. sodium lactate
D. tartaric acid
11
691 Which of the following can dissolve limestone?
A. ( C O_{2}+H_{2} O )
в. ( N a O H_{2}+H_{2} O )
c. ( N H_{3}+H_{2} O )
D. None of these
11
692 “Chlorination of calcium hydroxide produces bleaching powder”. If true enter ( 1, ) if false enter 0 11
693 The baking soda formula is :
A. ( K_{2} C O_{3} )
в. ( N a H C O_{3} )
c. both a and
D. none of these
11
694 “Of the alkali metals, only Na forms
nitrides.”
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0
11
695 Q16. Starting with sodium chloride how would you proceed to prepare.
(i) Sodium metal
(ii) Sodium hydroxide
(iii) Sodium peroxide
(iv) Sodium carbonate?
11
696 The reaction used to prepare ( N a O H )
from ( C a(O H)_{2} ) in earlier days is:
( N a_{2} C O_{3}+C a(O H)_{2} rightarrow 2 N a O H+ )
( boldsymbol{C a C O}_{3} downarrow )
If true enter 1 , else enter 0 .
11
697 Which statement is correct for alkaline
earth
metals?
A. They are diatomic and form ions of the type ( M^{2} )
B. They are highly electronegative elements
c. They are monoatomic in vapour state and form
ions of the type ( M^{2+} )
D. They are diatomic and form ions of the type ( M^{2+} )
11
698 The main raw materials required for the manufacture of portland cement are:
A. limestone and clay
B. limestone and gypsumm
c. limestone and calcium chloride
D. limestone and silica
11
699 “While comparison of ( L i^{+} ) and ( N a^{+} )
salts in terms of property of complex
formation we found that ( left[boldsymbol{L} boldsymbol{i}left(boldsymbol{N} boldsymbol{H}_{3}right)_{4}right] )
exists and ( N a ) does not form any
complex.” Answer whether the above statement is
true or false.
If true enter 1 , else 0
11
700 Q20. Which alkaline earth metals do not impart colour to the flame? 11
701 Which of the following is the formula of Sorel’s cement?
A. ( K C l cdot M g C l_{2} cdot 6 H_{2} O )
в. ( M g C l_{2} cdot 5 M g O cdot x H_{2} O )
( mathbf{c} cdot operatorname{CaSO}_{4} cdot 2 H_{2} O )
D. ( M g C O_{3} cdot C a C O_{3} )
11
702 Peroxides of alkali metals are:
A. Paramagnetic
c. Acidic in nature
D. Amphoteric in nature
11
703 Which of the following alkali metal ions has lowest ionic mobility in aqueous
solution?
( mathbf{A} cdot R b^{+} )
в. ( C a^{+} )
c. ( N a^{+} )
( mathbf{D} cdot L i^{+} )
11
704 Molecular formula of sodium hydride is
A. ( mathrm{NaH}_{3} )
в. ( mathrm{Na}_{2} mathrm{H}_{2} )
c. ман
D. ( mathrm{Na}_{2} mathrm{H} )
11
705 Calcium oxide is usually made by the thermal decomposition of materials, such as limestone or seashell, that contain calcium carbonate in a lime
kiln.
A. True
B. False
11
706 D
u) 15
10. Which of the following is used in photoelectric cells?
(a) Na
(6) K
(c) Li
(d) Cs
11
707 The alkali metal that reacts with
nitrogen directly to form nitride is:
A ( . L i )
в. ( N a )
c. ( K )
D. ( R b )
11
708 ( Z n C O_{3} ) is thermally more stable than
( M g C O_{3}, ) because
A ( cdot M g(O H)_{2} ) exhibits only 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
709 The first ionization energies of alkaline earth metals are higher than those of
the alkali metals. This is because:
A. there is increase in the nuclear charge of the alkaline earth metal
B. there is decrease in the nuclear charge of the alkaline earth metal
c. there is no change in the nuclear charge
D. none ofthe above
11
710 2.7 Some of the Group 2 metal halides are covalent and soluble in organic
solvents. Among the following metal halides, the one which is soluble in
ethanol is
(a) BeCl2 (b) MgCl2 (c) CaCl, (d) SrCl2
11
711 Magnesium powder burns in air to give:
A. ( M g O ) only
в. ( M g O ) and ( M gleft(N O_{3}right)_{2} )
c. ( M g O ) and ( M g_{3} N_{2} )
D. ( M gleft(N O_{3}right)_{2} ) and ( M g_{3} N_{2} )
11
712 Alkali metals are characterised by:
This question has multiple correct options
A. good conductor of heat and electricity
B. high oxidation potential
C. high melting point
D. solubility in liquid ammonia
11
713 ( L i A l H_{4} ) is obtained by reacting an
excess of ( quad ) with an ethereal
solution of ( boldsymbol{A} boldsymbol{l} boldsymbol{C l}_{3} )
A. Licl
в. LiН
c. ( L i )
D. ( L i O H )
11
714 When ( C l_{2} ) is passed through moist slaked lime, the compound formed is :
A. ( C a O_{2} C l_{2} )
в. ( C a O_{2} C l )
c. ( C a O C l )
D. ( operatorname{CaCl}_{2} mathrm{O}_{4} )
11
715 Q. 40 What is the structure of BeCl, molecule in gaseous and solid state 11
716 What is the value of electron gain
enthalpy of ( N a^{+} ) if ( I E_{1} ) of ( N A=5.1 e V )
( ? )
A. ( -5.1 e V )
В. ( -10.2 e V )
( mathbf{c} .+2.55 e V )
D. ( +10.2 e V )
11
717 5. In the Solvay process
(a) an ammoniacal brine solution is carbonated with CO,, forming NaHCO3 which
on decomposition at 150°C produces Na,CO,
(b) a sodium amalgum reacts with water to produce NaOH which gives Na CO, on
reacting with CO2
(c) A brine solution is made to react with BaCO3 to produce Na CO2
(d) all of the above
11
718 The alkaline earth metal ion that has
least electrical conductivity in aqueous solutions is:
( mathbf{A} cdot B a^{++} )
B. ( C a^{+} )
( mathbf{c} cdot B e^{++} )
D. ( C s^{+}+ )
11
719 Assertion
Be ( (text { O } H) ) a dissolves in excess NaOH
solution.
Reason
Be ( (O H) ) a is an acidic 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
720 Caustic alkalis are corrosive.
A. True
B. False
11
721 Cement is manufactured from:
A . clay
B. limestone
c. sodium chloride
D. both A and B
11
722 In the hardening stage of plaster of paris, the compound formed is :
A. ( operatorname{CaSO}_{4} )
B. orthorhombic ( C a S O_{4} .2 H_{2} O )
( mathrm{c} cdot mathrm{CaSO}_{4} cdot mathrm{H}_{2} mathrm{O} )
D. monoclinic ( C a S O_{4} .2 H_{2} O )
11
723 Q. 30 When heated in air, the alkali metals form various oxides. Mention the
oxides formed by Li, Na and K.
11
724 The reaction ( boldsymbol{C a} boldsymbol{C O}_{3}(boldsymbol{s}) Leftrightarrow boldsymbol{C a O}(boldsymbol{s})+ )
( C O_{2}(g) ) goes to completion in lime kiln.
A. True
B. False
11
725 Which of the following substances are
formed when lithium is heated in air?
A ( . L i_{2} O+L i O_{2} )
в. ( L i_{2} O_{2} )
c. ( L i O_{2} )
D. ( L i_{2} O+L i_{3} N )
11
726 A compound of sodium does not give
( C O_{2} ) when heated but it gives ( C O_{2} )
when treated with dilute acids. A
crystalline compound is found to have
37.1% Na and 14.52% ( boldsymbol{H}_{mathbf{2}} boldsymbol{O} ). Hence, the
compound is :
A. ( N a H C O_{3} .10 H_{2} O )
B. ( N a H C O_{3} .5 H_{2} O )
c. ( N a_{2} C O_{3} .10 H_{2} O )
D. ( N a_{2} C O_{3} . H_{2} O )
11
727 Portland cement does not contain:
A. ( C a_{3} A l_{2} O_{6} )
в. ( C a_{2} ) Si ( O_{3} )
( mathbf{c} cdot C a_{2} S i O_{4} )
D. ( C a_{3}left(P O_{4}right)_{2} )
11
728 Assertion
( boldsymbol{L i I}+boldsymbol{K} boldsymbol{F} rightarrow boldsymbol{L} boldsymbol{i} boldsymbol{F}+boldsymbol{K} boldsymbol{I}: ) This
reaction is spontaneous in forward side.
Reason

The larger anion stabilizes larger cation
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
729 The hydration energy of ( M g^{2+} ) is greater than that of :
A ( . A 1^{3} )
В. ( N a^{+} )
( c cdot B e^{3} )
D. ( M g^{3+} )
11
730 The thermal stability of alkaline earth
metal carbonates-
( M g C O_{3}, C a C O_{3}, S r C O_{3} ) and ( B a C O_{3} )
follows the order:
A. ( B a C O_{3}>S r C O_{3}>C a C O_{3}>M g C O_{3} )
в. ( C a C O_{3}>S r C O_{3}>M g C O_{3}>B a C O_{3} )
с. ( M g C O_{3}>C a C O_{3}>S r C O_{3}>B a C O_{3} )
D. ( B a C O_{3}>S r C O_{3}>M g C O_{3}>C a C O_{3} )
11
731 Diagonal relationship of elements in
due to same:
A . size
B. mass number
c. atomic number
D. electron affinity
11
732 Q. 23 Several sodium compounds find use in industries. Which of the following
compounds are used for textile industry?
(a) Na Co, (b) NaHCO3
. (C) NaOH.
d) NaCl
11
733 Which of the following is the chemical formula for washing soda?
A. ( C a O )
в. ( N a_{2} C O_{3} )
c. ( N H_{2} C l )
D. ( M g C l_{2} )
11
734 On treatment with cold water, an
element (A) reacts readily liberating a colorless, odorless gas ( (mathrm{B}) ) and ( mathrm{a} ) solution (C). Lithium is reacted with (B)
yielding a solid product (D) which effervescence with water to give a
strongly basic solution (E). When ( C O_{2} ) gas is bubbled through the solution ( (mathrm{C}) ) a white ppt (F) is formed but this redissolved forming solution (G) when
more ( C O_{2} ) is passed. The precipitate (F) effervesced when moistened with conc.
( H C l ) and give deep red coloration to the
Bunsen burner flame.(F) on heating
with an excess of carbon at ( 2000^{circ} mathrm{C} )
give (H). Metal (A) may be:
( A cdot B e )
B. ( c a )
( c cdot s r )
D. Ba
11
735 Chemical name and formula of washing soda is hydrated sodium carbonate and
( N a_{2} C O_{3} .10 H_{2} O ) respectively
A. True
B. False
11
736 The addition of which metal into liquid
( N H_{3} ) leads to the formation of a blue
solution:
This question has multiple correct options
A ( . L i )
в. ( S r )
c. ( C s )
D. ( B a )
11
737 The cementation process is:
A. gel formation
B. emulsion formation
c. both of ( A ) and ( B )
D. none of the above
11
738 Match the species in Column I with their corresponding property(ies) in Column II. 11
739 Q. 34 Discuss the trend of the following
(i) Thermal stability of carbonates of Group 2 elements.
(ii) The solubility and the nature of oxides of Group 2 elements
11
740 Potassium when heated strongly in oxygen, it forms:
в. ( K O_{2} )
( mathrm{c} cdot mathrm{K}_{2} mathrm{O}_{2} )
D. ( K O_{3} )
11
741 When caustic soda is manufactured
from sea water, one of the important by-
products is:
A . potash
B. chlorine
c. chromium
D. fertilizer
11
742 Q3. Name the compounds used for the manufacture of washing soda by Solvay process.
A M
ONTT
11
743 When Mg is burnt in air and they are
decomposed by ( boldsymbol{H}_{2} boldsymbol{O}, boldsymbol{M} boldsymbol{g} boldsymbol{O}, boldsymbol{M} boldsymbol{g}_{3} boldsymbol{N}_{2} )
changing to ( M g(O H)_{2} ) and ( N H_{3} ). If
true enter 1 , else enter 0
11
744 Choose the correct answer form the
alternatives given.

All alkali halides are soluble in water
except LiF. The low solubility of LiF in
water is due to its
(i) the low
solubility of Csl is due to
(ii).
LiF is soluble in
A. (i)-low lattice enthalpy (ii)-large hydration enthalpy
(iii)-polar solvents
B. (i)-high lattice enthalpy
(ii)-smaller hydration enthalpy (iii)-non-polar solvents
C . (i)-high hydration enthalpy (ii)-high lattice enthalpy
(iii)-non-polar solvents
D. (i)-smaller high hydration enthalpy (ii)-lattice enthalpy (iii)-polar solvents

11
745 A chemical A is used for the preparation of washing soda to recover ammonia.
When ( C O_{2} ) is bubbled through an aqueous solution of ( A, ) the solution turns milky. It is used in white washing due to disinfectant nature. What is the
chemical formula of ( A ) ?
A ( cdot C aleft(H C O_{3}right)_{2} )
в. ( C a O O )
( mathbf{c} cdot C a(O H)_{2} )
D. ( C a C O_{3} )
11
746 Q3. Why are alkali metals not found in nature? 11
747 ( boldsymbol{C a}(boldsymbol{O H})_{2} ) is formed when calcium oxide dissolves in water
A. True
B. False
11
748 The hydride ion ( H^{-} ) is stronger base
than its hydroxide ion ( O H^{-} . ) Which of the following reaction will occur if sodium hydride is dissolved in water?
A ( cdot H_{(a q)}^{-}+H_{2} O rightarrow H_{3} O^{+} )
B. ( H_{(a q)}^{-}+H_{2} O rightarrow O H^{-}+H_{2} )
c. ( H^{-}+H_{2} O rightarrow H_{2}+O_{2} )
D. ( H^{-}+H_{2} O rightarrow ) No reaction
11
749 Washing soda loses its crystal structure quickly 11
750 Baking powder contains baking soda and:
A. potassium hydrogen tartarate
B. calcium bicarbonate
c. sodium carbonate
D. vinegar
11
751 As per given sequence of reaction, His:
[
begin{aligned}
mathrm{Ca}+mathrm{H}_{2} & frac{Delta}{Delta} rightarrow mathrm{F} text { (Solid) } \
(mathrm{F})+mathrm{CaCl}_{2} & longrightarrow(mathrm{G}) text { Solid } \
(mathrm{G})+mathrm{H}_{2} mathrm{O} & longrightarrow(mathrm{H}) text { gas }
end{aligned}
]
( mathbf{A} cdot H C l )
в. ( C a H C l )
( c cdot C l_{2} )
D. ( H_{2} )
11
752 Alkaline earth metals have higher melting points than alkali metals.
If this is true enter 1 , if false enter 0 .
11
753 43. Find the odd one:
(1) Marble (2) Chalk
(3) Limestone (4) Slaked lime
11
754 When ( Z n ) is treated with excess of
NaOH, the product obtained is :
A. ( Z n(O H)_{2} )
в. ( Z n O H )
c. ( N a_{2} Z n O_{2} )
D. none of these
11
755 The reaction of ( N a C l ) and ( C a C O_{3} ) gives sodium carbonate. But this reaction
cannot be used for the manufacture of
washing soda since it is a reversible reaction.
A. True
B. False
11
756 A piece of magnesium ribbon was heated to redness in nitrogen gas and then dropped into water. The gas
evolved is:
A ( . N H_{3} )
в. ( H_{2} )
( c cdot O_{2} )
D. ( N_{2} )
11
757 The most stable carbonate among the following is :
A ( cdot L i_{2} C O_{3} )
в. ( N a_{2} C O_{3} )
( mathbf{c} cdot R b_{2} C O_{3} )
D. ( C s_{2} C O_{3} )
11

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