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The vapour density of a gas A is twice that of a gas B. If the molecular weight of B is M, the molecular weight of A will be :

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a
M
b
2M
c
3M
d
M2

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detailed solution

Correct option is B

We have
Molar mass= 2 times the vapour density
Mass is given as M. Thus, the value of vapour density,
=M2

Also, given that vapour density of A is four time that of B, th
Thus, the vapour density can be given as,

 

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