Chemical Equilibrium and Kinetics AFCAT Questions

AFCAT Chemistry

Chemical Equilibrium and Kinetics MCQ Questions


7.
The normal boiling point of water at 1.013 bar is:
A.
273 K
B.
0°C
C.
100°C
D.
373.15°C
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ANSWER :
C. 100°C
8.
At higher altitudes, the boiling point of water:
A.
Increases
B.
First increases then decreases
C.
Decreases
D.
Remains the same
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ANSWER :
C. Decreases
9.
Sublimation equilibrium is established between:
A.
A solid and its vapour
B.
A liquid and its vapour
C.
A solid and its liquid
D.
Two solids
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ANSWER :
A. A solid and its vapour
10.
Henry's law for the dissolution of gases in liquids states that the mass of gas dissolved is proportional to:
A.
The volume of the solvent
B.
The density of the gas
C.
The pressure of the gas above the solvent
D.
The temperature of the solvent
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ANSWER :
C. The pressure of the gas above the solvent
11.
Why does soda water fizz when the bottle is opened?
A.
Water reacts chemically with CO₂
B.
The temperature increases inside the bottle
C.
CO₂ becomes solid
D.
The pressure decreases, reducing CO₂ solubility, so dissolved CO₂ escapes
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ANSWER :
D. The pressure decreases, reducing CO₂ solubility, so dissolved CO₂ escapes
12.
The solubility of a gas in a liquid generally __________ with increase in temperature.
A.
First increases then decreases
B.
Remains constant
C.
Increases
D.
Decreases
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ANSWER :
D. Decreases