Chemistry Past Paper Questions

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Q 621:At 4oC the maximum density of water is:
A
1gcm-3
B
2gcm-3
C
3gcm-3
D
4gcm-3
Multan, 2018
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Q 622:Boiling range of Gasoline or petrol is:
A
80-170oC
B
170-250oC
C
250-350oC
D
350-400oC
Multan, 2018
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Q 623:Coal having 90% carbon contents is called.
A
Peat
B
Lignite
C
Anthracite
D
Bituminous
Multan, 2018
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Q 624:Dilute acids react with carbonates to produce the given products except:
A
Salt
B
Water
C
Carbon dioxide
D
Hydrogen
Multan, 2018
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Q 625:For the reaction, 2A +B ⇌ 3C the expression for the equilibrium constant is:
A
[2A][B]/[3C]
B
[A]²[B]/[C³
C
[3C]/[2A][B]
D
[C]³/[A]²[B]
Multan, 2018
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Q 626:Guldberg and Waage put forward law of mass action to:
A
1859
B
1869
C
1879
D
1889
Multan, 2018
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Q 627:If a liquid has a pH of 7 then it must:
A
Be colourless and odourless
B
Be neutral
C
Be a solution containign wter
D
Freeze at 0oC and boil at 100oC
Multan, 2018
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Q 628:In an irreversible reaction dynamic equilibrium:
A
Never establishes
B
Establishes before the completion of reaction
C
Establishes after the completion of reaction
D
Establish readily
Multan, 2018
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Q 629:Ice floats on water because:
A
Ice is denser than water
B
Ice molecules move randomly
C
Water is denser than ice
D
Wter molecules move randomly
Multan, 2018
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Q 630:Concentration is a ratio of:
A
Solvent to solute
B
Solute to solution
C
Solvent to solution
D
Solute to solvent
Multan, 2018
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Total MCQs: 1548Page 63 of 155
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