Question

The density of gas $A$ is four times that of another gas $B$. If the molecular weight of $A$ is $M$, the molecular weight of $B$ will be:

• A. $2M$
• B. $4M$
• C. $\frac{M}{4}$
• D. $\frac{M}{2}$

Answer 1

The correct option is C $\frac{M}{4}$

$\frac{M_1}{M_2}=\frac{d_1}{d_2}$

$\frac{M}{M_2}=\frac{4\times d_2}{d_2}$

Thus, $M_2=\frac{M}{4}$