Question

100 mL of $O_2$ gas diffuses in 10 s. 100 mL of gas ${}^{\prime }{X}^{\prime }$ diffuses in ${}^{\prime }{t}^{\prime }$ second. Gas ${}^{\prime }{X}^{\prime }$ and time $t$ can be:

• A. $H_2,2.5s$
• B. $S{O}_2,16s$
• C. $CO,10s$
• D. $He,4s$

Answer 1

The correct option is A $H_2,2.5s$

As Graham diffusion law-

$\frac{t2}{t1}=\sqrt{\frac{M_2}{M_1}}$

$\frac{t2}{10}=\sqrt{\frac{M_2}{32}}$

Since two unknown parameters are present, so we can substitute the values from the given options,

We get value of $t_2$ is $2.5$ and M is 2.

So, option (a) is correct.