The Second Law of Thermodynamics (Spontaneity of Processes; ΔS of the Universe and ΔG of the System as Criteria for Spontaneity...) NEET Questions

Physical Chemistry - Chemical Thermodynamics

The Second Law of Thermodynamics (Spontaneity of Processes; ΔS of the Universe and ΔG of the System as Criteria for Spontaneity...) MCQ Questions


13.
Which of the following processes shows an increase in entropy?
A.
Sugar dissolving in water
B.
Water vapor condensing
C.
Crystallization of NaCl from solution
D.
Liquid water freezing
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ANSWER :
A. Sugar dissolving in water
14.
Entropy change ΔS for a reversible process is given by:
A.
q_rev / T
B.
q_rev + T
C.
T / q_rev
D.
q_rev × T
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ANSWER :
A. q_rev / T
15.
The SI unit of entropy is:
A.
J/mol
B.
J K
C.
J/K
D.
kJ/mol
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ANSWER :
C. J/K
16.
Why is entropy change inversely proportional to temperature?
A.
Heat decreases with temperature
B.
Entropy is path-dependent
C.
At higher temperature, the system is already more disordered, so added heat causes less relative disorder
D.
Energy is conserved
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ANSWER :
C. At higher temperature, the system is already more disordered, so added heat causes less relative disorder
17.
Heat (q) added to a system has:
A.
Decreases molecular motion
B.
An ordering influence
C.
No effect on entropy
D.
A randomizing influence
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ANSWER :
D. A randomizing influence
18.
Temperature is a measure of:
A.
Volume of gas
B.
Average chaotic motion of particles
C.
Total energy of the system
D.
Pressure of gas
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ANSWER :
B. Average chaotic motion of particles