Question

The density of a gas at $STP$ is $2.86g{L}^{-1}$ . Then, vapour density of gas will be :-

• A. $16$
• B. $32$
• C. $64$
• D. $48$

Answer 1

Answer: (B)

$PM=dRT$
$(1)M=(2.86)(0.0821)(273)$
$V.D.=\frac{M}{2}=\frac{2.86\times 0.0821\times 273}{2}$
$=32$