The S-block Elements Questions

Blog IndicesBLOGSTagged

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.

The S-block Elements Questions

List of the s-block elements Questions

Question NoQuestionsClass
1Of 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
2Which is the major constituent of gun
powder?
A. Nitre
B. Sulphur
c. charocal
D. Chile salt petre		11
3The 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
4The element having greatest difference between its first and second ionization
energies is:
A. ( C a )
в. ( K )
( c . B a )
D. ( S e )		11
5Slaked 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
6State 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
7In 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
8Alkali 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
9Baking 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
10Lithium 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
11The 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
13Molten sodium chloride conducts
electricity due to the presence of:
A. free electrons
B. free molecules
c. atoms
D. free ions		11
14In 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
15Soda 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
16Arrange
( 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
17Which 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
18Alkali metals impart blue color to:
A. acidic solution
B. ammonia solution
c. nitrate solution
D. none of these		11
19Which 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
20The most lightest alkaline earth metal
is:
( A . B e )
в. ( M g )
( c . C a )
D. Ba		11
21Solubility 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
22Gypsum 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
230.17 The formula of soda ash is
(a) Na ,CO, 101,0
(c) Na2CO3.H2O
(b) Na2CO, 2H,0
(d) Na2CO3		11
24In seas, mainly how do marine organism build their shells?11
25The 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
27Q 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
28Among ( 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
29When 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
3041. Which of the following is very
reactive and kept in kerosene?
(1) Sodium (2) Potassium
(3) Iodine (4) Bromine		11
31Q5. 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
32Q16. 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
34Which 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
35Be ( O ) is almost insoluble but ( B e S O_{4} ) is
soluble in water. Explain.		11
36When magnesium ammonium phosphate is heated, it is converted to:
A. magnesium pyrophosphate
B. magnesium oxide
c. magnesium phosphate
D. magnesium nitride		11
37Which 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
38Suspension 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
39Fluorides 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
40What 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
41Which 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
42The elements that reacts with cold
water:
A . Mg
B. Са
( c . ) Ве
D. Mg & Ca		11
43The 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
44Potash 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
45Choose 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
46Draw a structure of ( B e C l_{2} ) in vapour
phase.		11
47Dilute nitric acid was added to the
calcium oxide.		11
48Assertion
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
49Assertion
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
50Two 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
520.27 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
53The 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
54Following 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
55Metallic 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
56The 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
57Q. 31 Complete the following reactions
(1) 0₂ ² + H₂O
(11) 0₂ + H₂O		11
58Passivity 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
59Statement: Sodium, when heated in
excess of oxygen, gives sodium oxide.
State whether the given statement is
true or false.
A. True
B. False		11
60Assertion
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
61ANS. IL 15 anyuruus Calcium Sulputate ca
Q8. What is Quick lime? What happens when it is added to water?		11
62When exposed to air, sodium
carbonate crystals lose water, turn into
( mathbf{a}: )
A. monohydrate
B. nanohydrate
c. decahydrate
D. hexahydrate		11
632.52 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
64Find 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
65The 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
66What are the uses of sodium
bicarbonate? (Any three)		11
67Q1. Why are alkali metals always univalent? Which alkali metal ion forms largest hydrated ion in
aqueous solution?		11
68To pour water on calcium oxide.”which
is another way to classify this reaction? Explain		11
69A 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
70Q23. Why is Lif almost insoluble in water whereas LiCl soluble not only in water but also in
acetone?
T
.
TE		11
71Only 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
72The 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
73As 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
75Be 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
76Consider 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
77Q. 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
78Identify ( 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
79In 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
80The 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
81Q. 35 Why are Beso, and MgSO, readily soluble in water while CaSO4, SrSO4
and BaSo, are insoluble?		11
82Element 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
83Among ( K O_{2}, A l O_{2}^{-}, B a O_{2} ) and ( N O_{2}^{+} )
unpaired electron is present in:		11
84Which 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
85In 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
86Q 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
87Which 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
88Solutions 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
89The 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
90Which 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
91The 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
92The common ingredient required for making cement and glass is:
A. washing soda
B. baking soda
c. limestone
D. potash		11
93Q4. 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
94Which anion is stable towards water:
( A cdot O^{2} )
в. ( O_{2}^{2} )
( c cdot O_{2} )
D. None of these		11
95Compare 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
96Beryllium forms hydrate peroxide,
( B e O_{2} cdot H_{2} O )
A. True
B. False		11
97The 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
98Which 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
100Among 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
101When baking soda reacts with vinegar, is formed.
A. sodium carbonate
B. sodium hydrogen carbonate
c. sodium acetate
D. none of above		11
102A 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
103Q. 14 Dead burnt plaster is
(a) CaSO4
(b) C
(c) CaSO4 H20
(d) CaSO4-2H,0		11
104Which substance when used with
butter having butyric acid can cure
acidity?
A . lime water
B. Soda water
c. calcium carbonate
D. lime juice		11
105Answer 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
106Assertion
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
107ation 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
108The alkali metal which acts as a
nutrient for plants is:
A. ( N a )
в. ( K )
( c cdot L i )
D. ( R b )		11
109Q. 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
110Which 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
111Q18. Describe two important uses of each of the following:
(i) caustic soda (ii) sodium carbonate (iii) quick lime		11
112Assertion
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
113Statement : Baking soda or baking powder is different.
Answer whether the above statement is
true or false.
A. True
B. False		11
114Raw 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
1150.19 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
116The anhydrous calcium sulphate is called :
A. gypsum
B. anhydrite
c. plaster of Paris
D. lime		11
117Itching causing ( _{-}-_{-}-_{-}- ) crystals are found in colocasia leaves.
A. calcium carbonate
B. calcium oxalate
c. calcium sulphate
D. calcium chloride		11
118The 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
119Explain how does the melting point change on moving from group- 1 to group- 2 in the periodic table?11
120Quicklime 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
121Q. 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
122Assertion
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
123What 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
124Which 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
125V.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
126The 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
127Among 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
128NaOH 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
129Explain, why electronegativity of Li is greater than Mg?11
130What is the chemical formula of plaster
of paris?		11
131Quicklime 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
132Which 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
133Compare hydration energy of ( B e^{2+} ) and
( boldsymbol{A} boldsymbol{l}^{3+} )		11
134The 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
135An 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
137The discomfort caused by indigestion
due to over-eating can be cured by taking:
A. vinegar
B. lemonjuice
c. baking soda
D. caustic soda		11
138Assertion
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
139C. 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
140A 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
141Increasing 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
142Q9. Arrange the following in the increasing order of solubility in water.
MgCl, CaCl, SrCl, BaCl2		11
143The 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
144Identify the following substances which are underlined:

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

11
145The 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
14622. 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
147What happens when? Sodium acilate react with soda lime?11
148Q15. What do you mean by diagonal relationship in periodic table?11
149Hydrogen 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
150Consider 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
151How 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
152How chlorine react with Cold and dilute
NaoH?		11
15348. What is the chemical name of the
common salt?
(1) Calcium Carbonate
(2) Sodium Carbonate
(3) Sodium Chloride
(4) None of these		11
154Which 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
155Calcium 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
156Choose 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
157The 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
158The lightest metal among the following is:
A . cs
B. Be
c. Na
D. Li		11
15951 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
160Assertion
( 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
161The 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
162Which 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
163Which salt can be used to identify coloured cation?
A. Borax
B. Microcosmic salt
c. Both (a) and (b)
D. None of these		11
164Q 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
165Q12. Discuss the various reactions that occur in the Solvay process.11
166Statement-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
167un 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
168Table salt becomes sticky on exposure during the rainy season. Explain.11
169In 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
170Among of alkali metals, the metal with highest ionization potential is :
A. ( L )
B. Na a
( c cdot k )
D. Rb		11
171Superoxides 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
172Some 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
173When lime is added to water
it reacts vigorously to form slaked lime.		11
174A 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
175Sodium 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
176Name 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
178Q2. Why alkali and alkaline earth metals cannot be obtained by chemical reduction method?
Ans. Because Ilceli
111 1		11
179Which 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
180Amphoteric 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
182Suboxide 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
183Manufacture 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
185The 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
186Lattice 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
187On 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
188Sodium 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
189Chlorine 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
190In 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
192Which 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
193Which 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
19407. What is dead burnt plaster?11
195Effervescence is seen when a bottle of
soda water is opened
A. True
B. False		11
196Which 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
197Q. 37 In the Solvay process, can we obtain sodium carbonate directly by treating
the solution containing (NH4)2CO3 with sodium chloride? Explain.		11
198Select 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
199Q17. 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
201Arrange 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
202Q1. Name the alkali metal which shows diagonal relationship with magnesium?11
203Which of the following forms the most basic hydroxide?
A. ( C u )
в. ( A l )
( c . N a )
D. ( Z ) n		11
204In 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
206Which 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
207Give 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
208The 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
209Recently, 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
210Which of the following compound is the final product of Solvay process?
A. Ammonium carbonate
B. Ammonium bicarbonate
c. sodium carbonate
D. Sodium bicarbonate		11
211When 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
212The metal with which hydrogen reacts to form metal hydride is:
A. ( H g )
в. ( C a )
( c . A g )
D. ( H )		11
213Why 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
215Which 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
216Assertion
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
217Which 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
218The 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
219Give 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
220Compare ( 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
222What 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
223Q. 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
224What is the action of ( C o_{2} ) on quick lime.11
225Which 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
226The compound having lowest melting point is:
A. Licl
в. ( C s C l )
c ( . R b C l )
D. KCl		11
227Which 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
228Among 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
229Sodium hydrogen carbonate is used in fire extinguisher.
A. True
B. False		11
230Mortar is a mixture of:
A. lime and water
B. lime and sand
C. lime, sand and water
D. lime and cement		11
231Which of the following can form a super oxide very easily?
A. Sodium
B. Potassium
c. caesium
D. Lithium		11
232Q14. 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
234Which 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
235Which one of the following oxides is soluble in water?
A. zinc oxide
B. Calcium oxide
c. Ferric oxide
D. Ferrous oxide		11
236Assertion
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
237The 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
238Assertion
( 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
239Which 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
240Sodium 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
241Read 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
242Which 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
243Q6. Compare the alkali metals and alkaline earth metals with respect to (i) ionization enthalpy, (ii)
basicity of oxides, (iii) solubility of hydroxides.		11
244Property 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
245What 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
247Which 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
248Q9. Why are potassium and caesium, rather than lithium used in photoelectric cells?11
249State True or False.
Molten Potassium burns in air forming potassium superoxide
A. True
B. False		11
250If 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
251The number of covalent bonds formed
by Be is:		11
252Q. 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
253State True or False.
Setting of cement is an endothermic
process
A. True
B. False		11
254State True or False.
Calcium bicarbonate is known in solid
state.
A. True
B. False		11
255The 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
256Which 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
257NaOH 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
258Lattice 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
259Gypsum 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
260Cake does not taste bitter due to
presence of
A. sodium carbonate
B. tartaric acid
c. citric acid
D. sodium bicarbonate		11
261Assertion
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
262The 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
263The insecticide chlordane is warmed
with dilute NaOH solution for some
time. The no. of NaOH consumed:		11
264The number of molecules of water of
crystallisation present in washing soda crystals is:
A . five
B. two
( c . ) ten
D. seven		11
265Unreacted 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
266The 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
267Q13. What is the general name for elements of group 1?
111.		11
26830. Brine refers to :
(1) Salt water
(2) Sweet water
(3) Pure water
(4) Starch water		11
269Assertion
( 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
270Calculate 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
272For 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
273The 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
274The colour of caustic soda turns pink when phenolphthalein is added.
A. True
B. False		11
275Q29. 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
276Q21. Describe the importance of the following:
(1) Limestone (ii) Cement (iii) Plaster of Paris.
Ang TT		11
277Rocksalt is:
A. ( K C l )
в. ( C a C l_{2} )
c. ( M g C l_{2} )
D. ( N a C l )		11
278When 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
279Which 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
280Which 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
281Be 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
282Which 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
283Which 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
284Observe 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
285Oxide, 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
286Compare the solubility and thermal stability of alkali metals carbonates with those of the alkaline earth metals
nitrates.		11
287Write equation for the reaction which take place when gas ( X ) reacts with lime water to form white precipitate ( Y )11
288A 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
289When 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
290What happens when Chlorine gas is passed through a hot concentrated
solution of ( N a O H ? )		11
291In 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
292The 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
293Solvay 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
294The 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
295Q. 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
296Quick 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
297Q9. Give the important uses of the following compounds.
(1) NaHCO, (ii) NaOH		11
298When 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
299Choose 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
300Q. 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
301Q3. 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
302Finely powdered clay and limestone mixed with water is introduced in:
A. drum mixer
B. rotary kiln
c. pan-type granulator
D. dryer		11
303Sodium is found more useful than
potassium. If true enter 1 ,if false enter 0		11
304Give preparation of Calcium oxide.11
305Washing 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
306Q. 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
307A 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
308The 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
309Which 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
310A 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
311Chlorine 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
312The 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
313Which 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
315The 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
316Sodium 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
317When ( 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
318Q. 24 Which of the following compounds are readily soluble in water?
(a) BeSO4 (b) MgSO4 (c) BaSO4
(d) SSOA		11
319The 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
320About 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
321The cathode in outer compartments of Castner-Kellner process is made of:
A . iron
B. copper
c. graphite
D. mercury		11
322Write equation for the reaction which take place when limestone reacts with
dilute HCI.		11
323Solution 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
324The 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
325Which 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
326Which 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
327Q4. Write the chemical formula of the following compounds.
(i) Chile salt petre (ii) Marble
(iii) Brine		11
328Out 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
329On 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
330lime 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
332Property 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
333The 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
334Calcium carbonate is a chemical
compound with the formula
( boldsymbol{C a}left(boldsymbol{H} boldsymbol{C O}_{3}right)_{2} )
( A cdot O )		11
335Q6. Name the alkaline earth metals whose salt do not impart colour to a non-luminous flame.11
336Q19. Which is more basic NaOH or Mg(OH)?11
337Assertion
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
338Gas ( (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
339Setting of mortar is the result of
reaction between slaked lime and ( C O_{2} )
of air.
A. True
B. False		11
340Which 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
342Which 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
343Q6. (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
344Statement-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
345Q7. Why are ionic hydrides of only alkali metals and alkaline earth metals are known? Give two
examples.		11
346The 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
347Sodium metals are kept in kerosene oil
Why?		11
348At high temperature, nitrogen combines
with ( C a C_{2} ) to give:
A. calcium cyanide
B. calcium cyanamide
c. calcium carbonate
D. calcium nitride		11
349Which 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
350Calcium hydroxide is found in:
A. window cleaner
B. soap
c. lime water
D. milk of magnesia		11
351Match the column.11
352Q17. Why do alkali metals give characteristic flame colouration?11
353What is slaked lime?11
354Cancer 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
355Among 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
356Assertion
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
357The 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
359Identify 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
360Pick 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
361Sodium 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
362The 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
363Lithium halide that is least soluble in
water has a molecular mass (rounded
to nearest integer)		11
364The 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
36548. Caustic soda is :
(1) deliquescent
(2) oxidant
(3) reductant
(4) efflorescent		11
366Metal 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
367A 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
368Which 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
369Nitrolim 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
370In 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
371Q5. What happens when crystals of washing soda are exposed to air?11
372What 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
373The 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
374You 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
375R. 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
376For 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
378In 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
379Match the cations from List I with their
properties in List II.		11
380When 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
381State whether the given statement is True or False.

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

11
382Name of the process.
( A cdot ) Solvay
B. Ammonia-soda
C. Both (A) & (B) correct
D. None of the above		11
383Assertion
( 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
384Which 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
385Identify 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
386Q5. Explain why is sodium less reactive than potassium.11
387Following 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
388The 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
389Which of the following is not hygroscopic?
A. ( mathrm{NaCl} )
в. ( mathrm{MgCl}_{2} )
c. ( mathrm{caCl}_{2} )
D. LiCl		11
390Q. 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
391Molten 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
392Q. 29 How do you account for the strong reducing power of lithium in aqueous
solution?
di torms of		11
393Q. 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
395heated 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
396What 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
397A mixture of cement, gravel, coarse sand and water is called:
A. mortar
B. concrete
c. slurry
D. hardner		11
398Write a balanced chemical equation for the following:

Flowers of sulphur boiled with calcium
hydroxide.

11
399HILI LUDUILUUUU
Q14. Why is Li,co, decomposed at a lower temperature whereas Na,Co, at higher temperature?
bd Therefore		11
400Q4. Which electrolyte is used to obtain sodium in Castner’s process?11
401heated 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
402Alkali 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
403In 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
404Choose 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
405Which 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
406Oxidation state of oxygen in ( K O_{2} ) is :
A . 0
B. –
( c cdot-frac{1}{2} )
D. –		11
407The 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
408Nature 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
40950. Soda ash is the name for :
(1) Sodium bicarbonate
(2) Hydrated sodium carbonate
(3) Sodium hydroxide
(4) Anhydrous sodium carbonate		11
410When ( 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
411Which 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
413Why are the group I metals soft, low melting and of low density?11
414Q. 16 Which of the following elements does not form hydride by direct heating
with dihydrogen?
(a) Be
(b) Mg
(c) Sr
(d) Ba		11
415Acetic 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
416Assertion
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
417A 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
418Which 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
420Which 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
421Q20. 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
422Which of the following has highest melting point?
A. Magnesium
B. Barium
c. Calcium
D. Beryllium		11
423Read 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
424Choose 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
425Statement 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
426The 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
427Q2. What is the effect of heat on the following compounds (Give equations for the reactions)?
(1) CaCO; (ii) CaSO4 2H,0		11
428The metal used in solar cells is:
A. Na
B. Li
( c cdot c s )
D. Mg		11
429Which 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
430Q. 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
431Filtrate ( 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
432Q22. Why are lithium salts commonly hydrated and those of the other alkali metal ions usuall..
anhydrous ?		11
433When 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
434Assertion
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
435Arrange 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
437Thus, 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
438Alkali 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
439Why are lithium salts commonly
hydrated and those of the other alkali ions usually anhydrous?		11
440Which 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
441Which 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
442Which 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
443Carbon dioxide gas turns limewater
milky.
A . True
B. False		11
444Explain the difference in reactivity of the group I metals with water.11
445Among ( 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
446Select 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
447Find the number of peroxide molecule(s) in the following:
( M g O, C a O, L i_{2} O, B a O_{2} )		11
448Dead 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
449Q2. 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
450Which 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
451The 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
452Quick 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
453Which 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
454A 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
455Mg 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
456Select 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
458Give the chemical name ( & ) formula of
chloride of lime. what happens when it is exposed to air. Write Chemical equation.		11
459What chemicals are obtained
industrially from sodium chloride? Outline the process.		11
460Hot 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
461In 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
462What 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
4638.9 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
464Baking 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
465Beautiful, 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
466Portland 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
467Select 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
468match 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
469Which 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
471The 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
472State 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
473Which 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
474The 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
476Why 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
477In 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
478The 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
479Complete 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
480Out 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
481Which of the following is organometalic compound
A. Methyl lithium
B. Lithium methoxide
c. Lithium dimethyl amide
D. Lithium acetate		11
482Sodium 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
483A 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
484State 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
485A 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
486Arrange 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
487Which 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
488Q24. Explain the significance of sodium, potassium, magnesium and calcium in biological fluids.
Ana Sada		11
489011. How would you prepare sodium silicate from silica?11
490The 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
491A 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
492Looking 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
493Cement is a mixture of:
A . calcium silicates
B. calcium aluminates
c. calcium silicates and aluminates
D. none of these		11
494As 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
495Sodium when burnt in excess of oxygen
gives sodium oxide. If true enter 1 , else
enter 0		11
496Explain 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
497Alkali 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
498Calcium 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
499Which 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
500Which one of the following has magnesium?
A. Vitamin ( B_{12} )
B. Chlorophyll
c. Haemocyanin
D. Carbonic anhydrase		11
501Why are potassium and caesium used,
rather than lithium used in
photoelectric cells?		11
502When 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
503A 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
504What 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
505Consider the following statement:
Both ( L i ) and ( M g ) forms hydrated
chloride.
If true enter ( 1, ) else enter 0		11
506Due 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
508The 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
509Q. 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
510Which 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
511The alkaline earth metal that has
greatest affinity for nitrogen is
A. sr
в. мв
( c cdot c a )
D. Ba		11
512Calcium 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
513Calamine 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
514What 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
517The substance not likely to contain
( boldsymbol{C a C O}_{3} ) is:
A. dolamite
B. sea shell
c. calcined gypsum
D. marble statue		11
518Q1. Why are alkali metals soft and have low melting points?
.1
1
* Low we were vuolewa *
1		11
519Why 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
520n 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
521Which 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
522R. 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
523Give four uses of sodium carbonate
(washing soda)		11
52421. 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
525Na 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
526The 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
527Select 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
528Under 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
529Statement : 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
530Q32. Which one of the following alkaline earth metal carbonates is thermally most stable?
(a) MgCo() Caco, (c) Srco; (d) BaCO3		11
531Plaster of paris is obtained by heating gypsum at controlled-temperature.
A. True
B. False		11
532Write the chemical formula of baking
soda.		11
533The 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
534The 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
535Assertion
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
536mole 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
537A 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
538Assertion
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
539Which 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
540The 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
542State 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
543Beryllium 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
544The element that does NOT form acidic
oxide is :
A. carbon
B. phosphorus
c. chlorine
D. barium		11
545State 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
546Anhydrone 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
547Assertion
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
548State 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
549Consider 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
550Which 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
551Write uses of baking powder
( left(N a H C O_{3}right) )		11
552Choose 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
553The chemical name of baking soda is:
A. sodium hydrogen carbonate
B. sodium carbonate
c. sodium bisulphite
D. none of the above		11
554The least electro positive alkali metal
is:
A. Sodium
B. Lithium
c. Potassium
D. Caesium		11
555Setting of cement is:
A. exothermic reaction
B. endothermic reaction
C. neither endothermic nor exothermic
D. None of the above		11
556Describe in details the industrial
electrolysis of sodium chloride. Comment on the purity of the products.		11
557Which 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
559Which 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
560Which 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
563Give 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
565In ( 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
566Match 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
567Which of the following objects are soluble in water?
A. Fodder
B. Table salt
c. chalk powder
D. clay		11
568Q. 39 Why do beryllium and magnesium not impart colour to the flame in the
flame test?		11
569Largest 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
570State 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
571A solution of a substance ‘X’ is used for
white washing.

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

11
572A solution of caustic soda (NoOH) in
water or when fused,conducts electric current. What is the similarity in these two cases?		11
573The metal which can displace hydrogen from acid is:
A . silver
B. calcium
c. mercury
D. gold		11
574A 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
575UULIL 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
576Which of the following metals can form nitride with nitrogen?
A ( . L i )
в. ( N a )
( mathrm{c} cdot M g )
D. ( C a )		11
577State True or False.
( B e H_{2} ) is an ionic hydride.
A. True
B. False		11
578In 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
580Sodium carbonate is used to:
A. preserve pickles, fish
B. baking industry
c. manufacture borax
D. all of above		11
581Why is tartaric acid added into baking soda to get baking powder?11
582Lithopone 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
583Compare and contrast the chemistry of group 1 metals with that of group 2 metals with respect to oxides.11
584Which 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
585Highly 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
586Halides 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
587Why lime has been used in mortar (a
lime, sand and water paste) in building houses, etc. for several thousand years?		11
588The 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
589Which 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
590Common name of sodium chloride is
salt.		11
591Which 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
59322
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
594Nuclear 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
595Which 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
596Which 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
597The 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
598Q30. Which of the alkali metal is having least melting point?
(a) Na (6) K (c) Rb (d) Cs		11
599Q1. What are the common physical and chemical features of alkali metals?11
600Q. 49 The stability of peroxide and superoxide of alkali metals increase as we
go down to group. Explain giving reason.
Thootability of		11
601Gypsum 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
602Anhydrous ( 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
603Find 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
604A 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
605Caustic soda is chemically sodium hydroxide ( (N a O H) )
A. True
B. False		11
606What is requirement for sodium in milligrams per day?
A . 400
B. 500
( c cdot 600 )
D. 700		11
607Q. 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
608As 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
609Which 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
610The 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
611Reaction 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
613Write 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
614Which 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
615Assertion
( 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
616One 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
617State True or False.
Tricalcium phosphate is used as a nutritional supplement and occurs naturally in cow milk.
A. True
B. False		11
618Alkaline earth metals are :
A. reducing agent
B. dehydrating agent
c. amphoteric
D. oxidising agent		11
619In 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
620The 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
621The 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
622The 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
6237. 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
625Q7. In what ways lithium shows similarities to magnesium in its chemical behaviour?
Ane
G Both
bit teformitidos		11
626Assertion
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
627What 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
628In 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
629Select 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
630Sulphate 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
631Which 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
632Which 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
633If ( 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
634Gypsum 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
635Match 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
636Correct 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
637If ( 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
638Which of the following cannot react with NaOH?
( A . B e )
в. ( F e )
c. ( A l )
D. Zn		11
639Metallic sodium is used as a drying
agent for:
This question has multiple correct options
A. chloroform
B. cyclohexane
c. diispropyl ether
D. diethylamine		11
640Chlorophyll, the green component of plants contains:
A ( cdot C a^{2} )
B. ( B e^{2} )
c. ( M g^{2+} )
D. ( B a^{2} )		11
641Q28. Write balanced equations for reactions between.
(a) Na, o, and water
(b) KO, and water
(c) Na, and CO,		11
642Discuss the various reactions that
occur in the Solvay process.		11
643Setting 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
644Chemical 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
645Q19. Draw the structure of (i) BeCl, (vapour), (ii) BeCl, (solid).11
646In 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
647The 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
649Identify ( (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
650010. Give the chemical formula of Epsom salt.11
651Q8. Explain why can alkali and alkaline earth metals not be obtained by chemical reduction method.
bottom
inente and reducing		11
652Identify ( (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
653um resembles magnesium in some of its properties. Mention two
such properties and give reasons for this resemblance.
oomblanca		11
654Caustic 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
655Which 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
656Name 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
65750 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
658Sodium hydride ( (N a H) ) when dissolved
in water produces:
A . acidic solution
B. basic solution
c. neutral solution
D. cannot be predicted		11
659The process associated with sodium carbonate manufacture is known as
A. Chamber
B. Haber
c. LeBlanc
D. castner		11
660What is the oxidation state of ( K ) in ( K O_{2} )
( ? )
A . -1
B. -2
( c cdot+1 )
D. 0		11
661Q31. Which one of the following alkali metals give hydrated salts?
(a) Li (b) Na (c) K (d) Cs		11
662What is the natural source of ( N a_{2} C O_{3} ? )
A. Nitre
B. Chile salt peter
c. Dolomite
D. Trona		11
663A cois
B. Happy Father’s Day
( c )
D.		11
664When ( 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
665What is the role of slaked lime and
animal charcoal in the manufacture of
sugar from sugarcane?		11
666A 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
668Q21. What is soda ash?11
669Na ( 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
670To 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
671NaOH is not produced in:
A. Nelson Cell method
B. Downs process
c. castner kellners method
D. Causticising process		11
672A 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
673The 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
674Chemical 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
675All 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
676Out 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
678The 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
679The magnetic quantum number of the valence electron of sodium is:
A . 2
B. 3
c. 1
( D )		11
680The 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
681On 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
682Assertion
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
683Final setting time of cement should not be more than:
A. 1 hour
B. 2 hours
c. 5 hours
D. 10 hours		11
684What 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
685In 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
686The substance known as soda ash is
( N a_{2} C O_{3} )
A. True
B. False		11
687Anhydrous magnesium chloride is obtained by heating the hydrated salt with dry
A. HCl.
в. Nacı
( c cdot ) both
D. none		11
688Mg is present in
A . Chlorophy
B. Haemoglobin
c. Vitamin-12
D. Vitamin-B		11
689When ( 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
690The constituent present in baking powder is:
A. sodium benzoate
B. acetic acid
c. sodium lactate
D. tartaric acid		11
691Which 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 011
693The 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
695Q16. Starting with sodium chloride how would you proceed to prepare.
(i) Sodium metal
(ii) Sodium hydroxide
(iii) Sodium peroxide
(iv) Sodium carbonate?		11
696The 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
697Which 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
698The 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
700Q20. Which alkaline earth metals do not impart colour to the flame?11
701Which 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
702Peroxides of alkali metals are:
A. Paramagnetic
c. Acidic in nature
D. Amphoteric in nature		11
703Which 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
704Molecular 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
705Calcium 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
706D
u) 15
10. Which of the following is used in photoelectric cells?
(a) Na
(6) K
(c) Li
(d) Cs		11
707The 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
709The 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
7102.7 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
711Magnesium 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
712Alkali 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
714When ( 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
715Q. 40 What is the structure of BeCl, molecule in gaseous and solid state11
716What 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
7175. 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
718The 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
719Assertion
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
720Caustic alkalis are corrosive.
A. True
B. False		11
721Cement is manufactured from:
A . clay
B. limestone
c. sodium chloride
D. both A and B		11
722In 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
723Q. 30 When heated in air, the alkali metals form various oxides. Mention the
oxides formed by Li, Na and K.		11
724The 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
725Which 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
726A 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
727Portland 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
728Assertion
( 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
729The 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
730The 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
731Diagonal relationship of elements in
due to same:
A . size
B. mass number
c. atomic number
D. electron affinity		11
732Q. 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
733Which 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
734On 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
735Chemical 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
736The 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
737The cementation process is:
A. gel formation
B. emulsion formation
c. both of ( A ) and ( B )
D. none of the above		11
738Match the species in Column I with their corresponding property(ies) in Column II.11
739Q. 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
740Potassium 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
741When caustic soda is manufactured
from sea water, one of the important by-
products is:
A . potash
B. chlorine
c. chromium
D. fertilizer		11
742Q3. Name the compounds used for the manufacture of washing soda by Solvay process.
A M
ONTT		11
743When 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
744Choose 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
745A 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
746Q3. 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
748The 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
749Washing soda loses its crystal structure quickly11
750Baking powder contains baking soda and:
A. potassium hydrogen tartarate
B. calcium bicarbonate
c. sodium carbonate
D. vinegar		11
751As 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
752Alkaline earth metals have higher melting points than alkali metals.
If this is true enter 1 , if false enter 0 .		11
75343. Find the odd one:
(1) Marble (2) Chalk
(3) Limestone (4) Slaked lime		11
754When ( 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
755The 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
756A 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
757The 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

Hope you will like above questions on the s-block elements and follow us on social network to get more knowledge with us. If you have any question or answer on above the s-block elements questions, comments us in comment box.

Stay in touch. Ask Questions.
Lean on us for help, strategies and expertise.

Related Posts

Leave a Reply

Your email address will not be published. Required fields are marked *

en English
zh-CN Chinese (Simplified)nl Dutchen Englishfr Frenchhi Hindiko Koreanru Russianes Spanishur Urdu