JEE Main 2025 — Thermodynamics (C) Question with Solution
JEE Main 2025 (2 Apr Shift 1)
Question
Two vessels A and B are connected via stopcock. The vessel A is filled with a gas at a certain pressure. The entire assembly is immersed in water and is allowed to come to thermal equilibrium with water. After opening the stopcock the gas from vessel A expands into vessel B and no change in temperature is observed in the thermometer. Which of the following statement is true?
Choose an option
Show full solutionCorrect option: D
Correct answer
DThe pressure in the vessel before opening the stopcock is zero.
Step-by-step explanation
It is free expansion of gas
Where and
Where and
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This is a previous-year question from JEE Main 2025, covering the Thermodynamics (C) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.