Chemistry Past Paper Questions

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Q 241:Amino Acids are the building blocks of:
A
Carbohydrates
B
DNA
C
Lipids
D
Proteins
Rawalpindi, 2019
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Q 242:Coal gas is mixture of:
A
CO and CH4
B
CO, CH4 and CO2
C
CO, CO2 and H2
D
CO, CH4 and H2
Rawalpindi, 2019
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Q 243:Crude oil is heated in furnace upto:
A
200oC
B
350oC
C
450oC
D
400oC
Rawalpindi, 2019
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Q 244:Equilibrium constnat exprression for given reaction is 2NO2 ⇌ N2O4:
A
[NO2]2/[N2O4]
B
[N2O4]/[NO2]2
C
[N2O4]/[NO2]
D
[N2O4]/[2NO2]
Rawalpindi, 2019
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Q 245:Active mass is represented by:
A
( )
B
{ }
C
[ ]
D
𝛹
Rawalpindi, 2019
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Q 246:Along the period from left to right, which one of the following decreases?
A
Atomic Radius
B
Ionization Energy
C
Electron Affinity
D
Electronegativity
Rawalpindi, 2019
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Q 247:How many times liquids are denser than gases?
A
100,000
B
10,000
C
1,000
D
100
Rawalpindi, 2019
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Q 248:Identify which pair of the following has polar covalent bonds?
A
O2 and Cl2
B
N2 and H2O
C
C2H2 and H2O
D
HCl and H2O
Rawalpindi, 2019
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Q 249:If 10cm3 of alcohol are dissolved in 100 g of water, it is called
A
% m/m
B
% m/v
C
% v/m
D
% v/m
Rawalpindi, 2019
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Q 250:In the following which has less water?
A
2 M
B
1 M
C
0.5 M
D
0.25 M
Rawalpindi, 2019
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Total MCQs: 1548Page 25 of 155
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