Consider a sample of oxygen behaving like an ideal gas. At $300 \,K ,$ the ratio of root mean square (rms) velocity to the average velocity of gas molecule would be :
(Molecular weight of oxygen is $32 \,g / mol$ $\left. R =8.3 \,J K ^{-1} mol ^{-1}\right)$
JEE MAIN 2021, Medium
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