Thermodynamics & Thermochemistry | JEE Main 2025 Solution

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JEE MAIN 2025

02-04-2025 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 ?

Select the correct option:

A

$dU \ne 0$

B

$dq \ne 0$

C

$dw \ne 0$

D

The pressure in the vessel B before opening the stopcock is zero

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

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