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Question: Answered & Verified by Expert
Assertion : Entropy is always constant for a closed system.
Reason : Closed system is always reversible.
ChemistryThermodynamics (C)AIIMSAIIMS 2011
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false.
  • D If both assertion and reason are false.
Solution:
1565 Upvotes Verified Answer
The correct answer is: If both assertion and reason are false.
For a closed system, the entropy can increase, decrease or remain constant. Closed system can be reversible or irreversible.

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