Physics - Heat & Thermo Question with Solution | TestHub

The formula of root-mean-square speed in terms of absolute temperature and molecular mass of the gas is, $$\begin{gathered} v_{RMS}=\sqrt{\frac{3RT}{M}} \\ \Rightarrow v_{RMS}\propto \frac{1}{\sqrt{M}} \end{gathered}$$, here we know that, $M_{{\mathrm{H}}_2}<M_{{\mathrm{O}}_2}<M_{{\mathrm{CO}}_2}$$\Rightarrow v_{\mathrm{H}}>v_{\mathrm{O}}>v_{\mathrm{C}}$.