Fundamentholfundamenthol

JEE Main 2026 Apr 2 Shift 2, Chemistry Q4: Basic Concepts of Thermodynamic

JEE Main2026Apr 2, Shift 2Chemistry
Q.

Gas 'A' undergoes change from state 'X' to state 'Y'. In this process, the heat absorbed and work done by the gas is J and J respectively. Now gas is brought back to state 'X' by another process during which J of heat is evolved. In the reverse process of 'Y' to 'X',

  1. A

    J of the work is done by the gas 'A'.

  2. B

    J of the work is done by the gas 'A'.

  3. C

    J of the work is done on the gas 'A' by the surrounding.

  4. D

    J of the work is done on the gas 'A' by the surrounding.

Solution

For the forward process X Y: J and work done by the gas J, so J.

J.

For the reverse process Y X, J (state function reverses sign).

Heat is evolved: J. Applying the first law: , so J.

Positive indicates work done on the gas by the surroundings J.

Concept behind this question

Basic Concepts of ThermodynamicNotes, formulas and examples →

More previous year questions on Basic Concepts of Thermodynamic

Practice more Chemistry

Concept-wise practice with instant solutions on Fundamenthol.

Start practicing →