Question

The vapour density of a gas is $22$. Its molecular weight is:

• A. $11$
• B. $22$
• C. $44$
• D. $66$

Answer 1

The correct option is C $44$

The molecular weight is twice the vapour density.

$\text{Molecular weight}=2\times \text{vapour density}$

When vapour density is $22$,

the molecular weight is $2\times 22=44$.