JEE Main 2019PhysicsThermodynamicsEasyMCQ

JEE Main 2019 — Thermodynamics Question with Solution

JEE Main 2019 (10 Apr Shift 1)

Question

A cylinder with fixed capacity of 67.2 litre contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by 20°C is:
[Given that R=8.31 J mol-1 K-1]

Choose an option

Show full solutionCorrect option: A
Correct answer
A748 J

Step-by-step explanation

The amount of heat supplied is
Q=nCVΔT
=67.222.43R220
=3×32×8.314×20
=748 J

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Thermodynamics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2019, covering the Thermodynamics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.