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JEE PHYSICS MCQ: THERMODYNAMICS
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Statement-I: Two vessels A and B are connected to each other by a stopcock. Vessel A contains a gas at and 1 atmosphere pressure and vessel B is evacuated. The two vessels are thermally insulated from the surroundings. If the stopcock is suddenly opened, the expanding gas does no work.
Statement-II: Since and as the gas expands freely so and from the first law of thermodynamics it follows that is also zero for the above process.
Statement-II: Since and as the gas expands freely so and from the first law of thermodynamics it follows that is also zero for the above process.
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Correct option: A
Statement-I is true and statement-II is true
Option A (Statement-I is true and statement-II is true) is correct because in free expansion, no work is done, and since it's insulated, there's no heat exchange, leading to no change in internal energy.
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