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  4. A gas has a vapour density 11.2. The volume occupied by lg of the gas at NTP is :

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Q. A gas has a vapour density $11.2.$ The volume occupied by $lg$ of the gas at NTP is :

Bihar CECEBihar CECE 2004Some Basic Concepts of Chemistry

Solution:

(i) Molecular weight $=2 \times$ vapour density
(ii) Molecular weight in gram $=22.4 L$ at STP
Given vapour density $=11.2$ Molecular weight $=2 \times 11.2=22.4$
$\therefore 22.4 \,g$ of gas occupies $=22.4\, L$ at STP
$\therefore 1 \,g$ of gas occupies $=\frac{22.4}{22.4} \times 1$
$=1\, L$ at $STP$