Physics-Entropy
NEET Physics Entropy Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 11
Assertion (A): For an irreversible isothermal expansion of an ideal gas, the total entropy change is not zero. | Reason (R): In an irreversible process, the internal energy change of an ideal gas is zero.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option B
Detailed Explanation
According to the NCERT context, for an irreversible isothermal process, the total entropy change is not zero, even though the internal energy change is zero. However, the zero internal energy change does not explain the non-zero entropy change.
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