Question

The ratio of root mean square velocity to average velocity of a gas molecule at a particular temperature is –

• A. 1.086 : 1
• B. 1 : 1.086
• C. 2 : 1.086
• D. 1.086 : 2

Answer 1

Answer: (A)

1.086 : 1

Answer 2

u_rms : u_av = $\sqrt{\frac{3RT}{M}}:\sqrt{\frac{8RT}{\pi M}}$

or $\sqrt{3}:\sqrt{\frac{8}{\pi}}$ = 1.086:1