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JEE Main 2026 Apr 4 Shift 1, Chemistry Q4: Basic Concepts of Thermodynamic

JEE Main2026Apr 4, Shift 1Chemistry
Q.

Given below are two statements:

Statement I : For an ideal gas, heat capacity at constant volume is always greater than the heat capacity at constant pressure.

Statement II : In a constant volume process, no work is produced and all the heat withdrawn goes into the chaotic motion and is reflected by a temperature increase of the ideal gas.

In the light of the above statements, choose the correct answer from the options given below

  1. A

    Both Statement I and Statement II are true

  2. B

    Both Statement I and Statement II are false

  3. C

    Statement I is true but Statement II is false

  4. D

    Statement I is false but Statement II is true

Solution

For an ideal gas, Mayer's relation gives , so , not the other way around. Statement I has the inequality reversed and is false.

Statement II follows from the first law: at constant volume , hence , and all absorbed heat raises the temperature (internal energy) of the gas. True.

Concept behind this question

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