Equilibrium Involving Physical Processes (Solid-Liquid, Liquid - Gas and Solid-Gas Equilibria, Henry's Law...) NEET Questions

Physical Chemistry - Equilibrium

Equilibrium Involving Physical Processes (Solid-Liquid, Liquid - Gas and Solid-Gas Equilibria, Henry's Law...) MCQ Questions


7.
The equilibrium vapor pressure of a liquid in a closed container depends on:
A.
Surface area of the liquid
B.
Volume of the container
C.
Temperature only
D.
Amount of liquid present
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ANSWER :
C. Temperature only
8.
For any pure liquid at 1 atm pressure, the temperature at which the liquid and vapor are in equilibrium is called:
A.
Critical temperature
B.
Normal boiling point
C.
Normal melting point
D.
Triple point temperature
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ANSWER :
B. Normal boiling point
9.
Three watch glasses containing 1 mL each of acetone, ethanol, and water are exposed to atmosphere. The order of complete evaporation time (fastest to slowest) is:
A.
Water < Ethanol < Acetone
B.
Acetone < Ethanol < Water
C.
Ethanol < Water < Acetone
D.
All evaporate at the same rate
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ANSWER :
B. Acetone < Ethanol < Water
10.
Equilibrium between a liquid and its vapor cannot be reached in an open system because:
A.
Vapor molecules disperse into the atmosphere preventing condensation back to liquid
B.
Atmospheric pressure changes too rapidly
C.
Open systems have catalysts
D.
Temperature continuously changes
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ANSWER :
A. Vapor molecules disperse into the atmosphere preventing condensation back to liquid
11.
Which of the following will have lowest vapor pressure at the same temperature?
A.
Ethanol
B.
Water
C.
Acetone
D.
Diethyl ether
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ANSWER :
B. Water
12.
If a liquid X has higher vapor pressure than liquid Y at the same temperature, then:
A.
X is less volatile than Y
B.
X has lower boiling point than Y (X is more volatile)
C.
X and Y must be the same liquid
D.
X has higher boiling point than Y
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ANSWER :
B. X has lower boiling point than Y (X is more volatile)