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

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

NTA AbhyasNTA Abhyas 2022

Solution:

$PM=dRT$
$\left(\right.1\left.\right)M=\left(\right.2.86\left.\right)\left(\right.0.0821\left.\right)\left(\right.273\left.\right)$
$V.D.=\frac{M}{2}=\frac{2 . 86 \times 0 . 0821 \times 273}{2}$
$=32$