Second law: ΔS > 0 for irreversible processes in isolated systems.
Back to JEE Advanced 2026 Thermodynamics
JEE Advanced 2026 — Physics Thermodynamics
medium
mcq
2026
Official previous-year question
Verified 30 May 2026.
Question
The entropy of an isolated system in an irreversible process:
Options
- A
Decreases
- B
Remains constant
- C
Increases
- D
First increases then decreases
Solution
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