JEE Main 2022 · PhysicsMultiple choiceSingle correctHardMulti-step

JEE Main 25 July 2022, Shift 2, Physics Q44

Question 44 of 90 in this shift, Physics question 14 of 30, Section A.

Sound travels in a mixture of two moles of helium and n moles of hydrogen. If rms speed of gas molecules in the mixture is

\sqrt{2}

times the speed of sound, then the value of n will be :

(1)1
(2)2Official answer
(3)3
(4)4

Official answer

Option 2

NTA final key.

Chapter: Waves
Topic: Sound Velocity
Idea tested: Speed of Sound in Gas Mixtures

Same topic in other shifts

All Sound Velocity questions

31 Jan 2024, Shift 2 · Q38The speed of sound in oxygen at S.T.P. will be approximately: (given, $R=8.3\ \mathrm{JK^{-1}}$ , $\gamma=1.4$ )MediumSingle correct
6 Apr 2023, Shift 2 · Q40The ratio of speed of sound in hydrogen gas to the speed of sound in oxygen gas at the same temperature is:EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.