Question

During separation of $C{O}_2$ and hydrogen gas by diffusion the gas that diffuses rapidly is:

Answer 1

Diffusion coefficient=D=$\frac{1}{3}\overline{c}l$ [l=length of the plane]

$\overline{c}$=average speed=$\sqrt{\frac{8RT}{\pi M}}$

So, $D\propto \frac{1}{\sqrt{M}}$ at given temperature.

Since, $M_{C{O}_2}>M_{H_2}$, $\therefore D_{H_2}>D_{C{O}_2}$

$\therefore H_2$ gas diffuses rapidly.