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JEE PHYSICS MCQ: THERMODYNAMICS
1
Medium
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Understanding
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Assertion: In free expansion of an ideal gas internal energy is constant.
Reason: No heat is added and no work is done in free expansion.
Reason: No heat is added and no work is done in free expansion.
View answer and explanation
Correct option: A
If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion
Option A is correct because in free expansion, no external pressure opposes the expansion, hence no work is done, and if no heat is exchanged, the internal energy remains constant.
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