Question

Equal masses of oxygen, hydrogen and methane are taken in identical conditions. What is the ratio of volumes of gases under identical conditions?

• A. $16:1:8$
• B. $1:16:2$
• C. $1:16:8$
• D. $2:16:1$

Answer 1

The correct option is B $1:16:2$

We know,
$PV=nRT$
Since, gases are taken at identical condition
$V_{O_2}:V_{H_2}:V_{C{H}_4}=n_{O_2}:n_{H_2}:n_{C{H}_4}$
We know,
$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$
$=\frac{w}{32}:\frac{w}{2}:\frac{w}{16}$
$=1:16:2$