Question

Density ratio of $O_{2}$ and$H_{2}$ is 16 : 1. The ratio of their r.m.s. velocities will be

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

Answer 1

Answer: (C)

1 : 4

Answer 2

$\frac{r_{1}}{r_{2}} = \frac{v_{1}}{v_{2}} = \sqrt{\frac{d_{2}}{d_{1}}} = \sqrt{\frac{1}{16}} = 1:4$.