Question

The ratio of most probable velocity to that of average velocity is

• A. $\pi /2$
• B. $2/\pi$
• C. $\sqrt{\pi }/2$
• D. $2/\sqrt{\pi }$

Answer 1

Answer: (C)

$\frac{V_{mp}}{V_{av}}=\frac{\sqrt{\frac{2RT}{M}}}{\sqrt{\frac{8RT}{\pi M}}}$
$=\frac{\sqrt{\pi }}{2}$