Question

The vapour density of a gas is 11.2. The volume occupied by 11.2 gms. of the gas at S.T.P. is
1) 11.2 lit 2) 4 lit. 3) 2 lit. 4) 22.4 lit

Answer 1

The correct option is 1.

Molecular mass of the gas=$2\times vapourdensityofgas$

molecular mass=$2\times 11.2$=22.4 g/m

22.4 g of the gas= 1 mol of the gas

11.2 g of gas=$\frac{1\times 11.2}{22.4}$=0.5 mol of gas

1 mol of gas= 22.4 l gas

then 0.5 mol of gas= $(22.4\times 0.5)$

=11.2 l of gas