Chemistry Past Paper Questions

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Q 631:In the Lime Kiln, the reaction goes to completion due to: CaCO3 →CaO+ CO2
A
Of high temperature
B
CaO is more stable than CaCO3
C
CO2 escapes continuously
D
CaO is not dissociated
Multan, 2018
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Q 632:Just above the Earth's surface is:
A
Mesophere
B
Stratosphere
C
Thermosphere
D
Troposphere
Multan, 2018
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Q 633:Main component of Natural Gas is:
A
Methane
B
Propane
C
Butane
D
Propene
Multan, 2018
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Q 634:Matte is a mixture of:
A
FeS and CuS
B
Cu2O and FeO
C
Cu2S and FeS
D
CuS and FeO
Multan, 2018
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Q 635:Mendeleev's periodic table was based upon:
A
Electronic Configuration
B
Atomic mass
C
Atomic number
D
Completion of Subshell
Multan, 2018
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Q 636:Molarity is the number of moles of solute dissolved in:
A
1 kg of solution
B
100g of solvent
C
1 dm3 solvent
D
1 dm3 of solution
Multan, 2018
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Q 637:Molarity is the number of moles of solute dissolved in:
A
1 kg of solution
B
100 g of solvent
C
1 dm3 solvent
D
1 dm3 of solution
Multan, 2018
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Q 638:Mark incorrect statement about Ionization Energy:
A
it is measured in KJ mol-1
B
It decreases in a period
C
It is absorption of energy
D
It decreases in a group
Multan, 2018
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Q 639:In soft drink the solvent is:
A
Benzene
B
Water
C
Milk
D
Oil
Multan, 2018
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Q 640:In the evaporation process, liquid molecules which leave the surface of the liquid have:
A
Very low energy
B
Moderate energy
C
Very high energy
D
No energy
Multan, 2018
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Total MCQs: 1548Page 64 of 155
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