JEE Main 2025 Jan 23 Shift 1, Physics Q9: Thermodynamic Processes

JEE Main2025Jan 23, Shift 1Physics

Match the List-I with List-II

List-I	List-II
A. Pressure varies inversely with volume of an ideal gas.	I. Adiabatic process
B. Heat absorbed goes partly to increase internal energy and partly to do work.	II. Isochoric process
C. Heat is neither absorbed nor released by a system	III. Isothermal process
D. No work is done on or by a gas	IV. Isobaric process

Choose the correct answer from the options given below :

Solution

Identify each process from its signature:

(A) $P \propto 1/ V$ , i.e. $P V =$ constant, which by the ideal gas law means $T$ is constant. Isothermal. $\Rightarrow$ III.

(B) Heat goes partly into $Δ U$ and partly into work $W = P Δ V$ ; this is true whenever $V$ changes at constant $P$ . Isobaric. $\Rightarrow$ IV.

(D) Work $W = \int P d V = 0$ requires $d V = 0$ . Isochoric. $\Rightarrow$ II.

$∴$ A-III, B-IV, C-I, D-II.

Concept behind this question

Concept-wise practice with instant solutions on Fundamenthol.