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Relationship between Vapor Density & Relative Molecular Mass

Vapour densit...

Question

Vapour density of a volatile substance is $4.$ Its molar mass would be :

A

8

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B

2

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C

64

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D

128

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Solution

The correct option is A 8
Molar mass $= 2 \times$ vapour density
$M = V \times 2 = 4 \times 2 = 8$

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