Chemistry Past Paper Questions

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Q 1421:For a reaction between PCl3 and Cl2 to form PCl5 the units of Kc are:
A
mol dm-3
B
mol-1 dm-3
C
mol-1 dm3
D
mol dm3
Rawalpindi, 2016
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Q 1422:For the reaction 2A + B ⇔ 3C the expression for equilibrium constant is:
A
[2A] [B] / [3C]
B
[A]2 [B] / [C]3
C
[3C] / [2A] [B]
D
[C]3 / [A]2 [B]
Rawalpindi, 2016
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Q 1423:Formula of Palmitic acid is:
A
C15H31COOH
B
C17H35COOH
C
C18H37COOH
D
C5H11COOH
Rawalpindi, 2016
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Q 1424:General formula of alkynes
A
CnH2n
B
CnH2n+1
C
CnH2n+2
D
CnH2n-2
Rawalpindi, 2016
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Q 1425:Heat capacity of water is:
A
4.2 kg K-1
B
4.2 Jg-1 K-1
C
4.3 Jg-1K-1
D
2.4JgK-1
Rawalpindi, 2016
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Q 1426:Ionic compounds are soluble in water due to:
A
Hydrogen Bonding
B
Ion-Dipole Forces
C
Dipole-Dipole Forces
D
Dipple-Induced Dipple Forces
Rawalpindi, 2016
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Q 1427:If a liquid has a pH of 7 then it must be:
A
A colorless and odorless liquid
B
freeze at 0° C and boil at 100°C
C
neutral
D
a solution containing watter
Rawalpindi, 2016
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Q 1428:In redox reaction between Zn and HCl, the oxidizing agent is:
A
Zn
B
H+
C
HCl
D
Cl-
Rawalpindi, 2016
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Q 1429:Mist is an example of which solution?
A
Liquid in gas
B
Gas in liquid
C
Solid in gas
D
Liquid in solid
Rawalpindi, 2016
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Q 1430:How many times liquids and solids are denser than gases?
A
100 Times
B
1000 Times
C
10,000 Times
D
100,000 Times
Rawalpindi, 2016
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Total MCQs: 1548Page 143 of 155
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