A mixture of 2 moles of helium gas (atomic mass $=4 \mathrm{u}$ ), and 1 mole of argon gas (atomic mass $=40 \mathrm{u}$ ) is kept at $300 \mathrm{~K}$ in a container. The ratio of their rms speeds $\left[\frac{\mathrm{V}_{\mathrm{rms}}(\text { helium })}{\mathrm{V}_{\mathrm{rms}}(\operatorname{argon})}\right]$ is close to :

Question:

A mixture of 2 moles of helium gas (atomic mass $=4 \mathrm{u}$ ), and 1 mole of argon gas (atomic mass $=40 \mathrm{u}$ ) is kept at $300 \mathrm{~K}$ in a container. The ratio of their rms speeds

$\left[\frac{\mathrm{V}_{\mathrm{rms}}(\text { helium })}{\mathrm{V}_{\mathrm{rms}}(\operatorname{argon})}\right]$ is close to :

1. $3.16$

2. $0.32$

3. $0.45$

4. $2.24$

JEE Main Previous Year Single Correct Question of JEE Main from Physics Kinetic Teory chapter.

JEE Main Previous Year 9 Jan. 2019 I

Correct Option: 1

Solution: