Chemistry Past Paper Questions

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Q 171:The reduction of alkyl halides takes place in the presence of:
A
Mg/HCl
B
Cu/HCl
C
Na/HCl
D
Zn/HCl
Lahore, 2019
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Q 172:The water of crystallization is responsible for the:
A
Meltin points of crystals
B
Boiling points of crystals
C
Shapes of crystals
D
Transition point of crystals
Lahore, 2019
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Q 173:Thousands of amino acids polymerize to form:
A
Vitamins
B
Carbohydrates
C
Protein
D
Lipids
Lahore, 2019
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Q 174:When NaHCO3 is heated it forms:
A
CaO is more stable than CaCO3
B
CaCO3
C
CO2 escapes continuously
D
Ca*OH)2
Lahore, 2019
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Q 175:Which is secondary pollutant:
A
H2SO4
B
CO2
C
CO
D
SO3
Lahore, 2019
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Q 176:The unit of molar concentration is:
A
mol dm-3
B
mol dm-2
C
mol dm-1
D
mol-1dm-1
Lahore, 2019
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Q 177:The volume in cm3 of solute dissolved in 100 grams of solution is called:
A
% m/m
B
% m/v
C
% v/m
D
% v/v
Lahore, 2019
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Q 178:The Scientist who discovered proton:
A
Chadwick
B
Thomson
C
Goldstein
D
Bohr
Lahore, 2019
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Q 179:The solubility of which one decreases by increasing temperature:
A
Ca(OH)2
B
KNO3
C
Li2SO4
D
AgNO3
Lahore, 2019
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Q 180:The number of elements in fourth period is:
A
8
B
10
C
18
D
32
Lahore, 2019
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Total MCQs: 1548Page 18 of 155
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