Question

The vapour density of carbon dioxide $\left[\mathrm{C}=12,\mathrm{O}=16\right]$.

• A. $12$
• B. $16$
• C. $44$
• D. $22$

Answer 1

The correct option is D

$22$

Explanation for the correct option:

Vapour density is defined as the ratio of the molar mass of the gas to the molar mass of the hydrogen gas$\left({\mathrm{H}}_2\right)$.

$\mathrm{Vapour}\mathrm{density}=\frac{\mathrm{molar}\mathrm{mass}\mathrm{of}\mathrm{the}\mathrm{gas}}{\mathrm{molar}\mathrm{mass}\mathrm{of}\mathrm{the}{\mathrm{H}}_2}$

$\mathrm{Vapour}\mathrm{density}=\frac{\mathrm{molar}\mathrm{mass}\mathrm{of}{\mathrm{CO}}_2}{\mathrm{molar}\mathrm{mass}\mathrm{of}{\mathrm{H}}_2}$

$\mathrm{Vapour}\mathrm{density}=\frac{12+2\times 16}{2}$

$\mathrm{Vapour}\mathrm{density}=\frac{44}{2}$

$\mathrm{Vapour}\mathrm{density}=22$

Hence, option (D) is correct. The vapour density of carbon dioxide is $22$.