A mixture of 2 moles | KTG & THERMODYNAMICS | JEE-MAIN 2019

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JEE Main 2019

9-01-2019 S1

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 K in a container. The ratio of their rms speeds $\left[\frac{\mathrm{V}_{\mathrm{rms}}(\text { helium })}{\mathrm{V}_{\mathrm{rms}}(\text { arg on })}\right]$, is close to

Select the correct option:

A

2.24

B

0.45

C

3.16

D

0.32

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