MHT CET 2026 Physics question

An ideal gas having pressure P, volume V and temperature T undergoes a thermodynamic process in which dW = 0 and dQ < 0. Then, for the gas

(A)T will increase.
(B)V will increase.
(C)T will decrease.Correct
(D)P may increase or decrease.

Answer: (C)

Solution

First law: . With , . For an ideal gas the internal energy depends only on temperature (), so : the temperature decreases, option (C). Since $dW = P dV

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Question ID VK-100823