Question

The R.M.S. velocity of $C{H}_4$, He and $S{O}_2$ are in the ratio of

• A. 16 : 4 : 64
• B. 2 : 1 : 4
• C. 2 : 4 : 1
• D. 1 : 4 : 2

Answer 1

Answer: (C)

R.M.S. velocity = $\sqrt{\frac{3RT}{M}}$
$\therefore$ The ratio of R.M.S. velocities of $C{H}_4$, He and $S{O}_2$ will be
$\sqrt{\frac{3RT}{16}}:\sqrt{\frac{3RT}{4}}:\sqrt{\frac{3RT}{64}}=2:4:1$