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.
Spontaneous processes are those which occur
A.
Without external influence
B.
With external influence
C.
Only at low temperatures
D.
Only in an open system
😑 View Answer Rough Work Error
ANSWER :
A. Without external influence
14.
When a reaction is exothermic (ΔH < 0) and entropy decreases (ΔS < 0), it is spontaneous at
A.
High temperature
B.
Low temperature
C.
All temperatures
D.
No temperature
😑 View Answer Rough Work Error
ANSWER :
B. Low temperature
15.
The entropy of the universe always
A.
Increases
B.
Decreases
C.
Remains constant
D.
Unpredictable
😑 View Answer Rough Work Error
ANSWER :
A. Increases
16.
The standard Gibbs energy change (ΔG°) for a reaction is negative when
A.
Equilibrium constant (K) is > 1
B.
K = 1
C.
K < 1
D.
K = 0
😑 View Answer Rough Work Error
ANSWER :
A. Equilibrium constant (K) is > 1
17.
Which equation relates Gibbs free energy to temperature and entropy?
A.
ΔG = ΔH - TΔS
B.
ΔG = ΔH + TΔS
C.
ΔG = TΔS - ΔH
D.
ΔG = ΔH / T
😑 View Answer Rough Work Error
ANSWER :
A. ΔG = ΔH - TΔS
18.
Which law states that all spontaneous processes increase the entropy of the universe?
A.
First law
B.
Second law
C.
Third law
D.
Zeroth law
😑 View Answer Rough Work Error
ANSWER :
B. Second law