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Q)

Vapour density of a gas is 22. What is its molecular mass?

$\begin{array}{1 1} (a)\; 22\\(b)\; 44\\ (c)\;20 \\ (d)\;30 \end{array} $

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A)
Solution :
Vapour density = Molecular mass/ 2
22 = Molecular mass /2
22 × 2 = molecular mass
44 = molecular mass.
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