Physics · Kinetic Theory of Gases

JEE Main 2025 — 3 April, Evening Shift — Question 64

Pressure of an ideal gas, contained in a closed vessel, is increased by $0.4 \%$ when heated by $1^{\circ} \mathrm{C}$ . Its initial temperature must be:

Option A:
$25^{\circ} \mathrm{C}$
Option B:
$250^{\circ} \mathrm{C}$
Option C:
250 K
Correct
Option D:
2500 k

Answer: C

Step-by-step solution

For constant volume

$\frac{P}{T}=$ constant

$\frac{\Delta P}{P}=\frac{\Delta T}{T}$

$\frac{0.4}{100}=\frac{1}{T}$

$T=\frac{100}{0.4}=250 \mathrm{~K}$

Answer key and solution verified before publishing.

Practise Kinetic Theory of Gases

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Solve a similar one free

Exam: JEE Main 2025
Paper: 3 April, Evening Shift
Subject: Physics
Chapter: Kinetic Theory of Gases
Topic: Energy of Gas and Gas Laws and Miscellaneous Problems