Question

The ratio of rates of effusion of $S{O}_2$ to $S{O}_3$ is:

• A. $\sqrt{\frac{5}{4}}$
• B. $\sqrt{\frac{4}{5}}$
• C. $\sqrt{\frac{3}{4}}$
• D. $\sqrt{\frac{4}{3}}$

Answer 1

The correct option is A $\sqrt{\frac{5}{4}}$

From Graham's law of effusion,
$\frac{r_1}{r_2}=\sqrt{\frac{M_2}{M_1}}$
$\Rightarrow \frac{r_1}{r_2}=\sqrt{\frac{80}{64}}=\sqrt{\frac{5}{4}}$