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Q.

The vapour density of 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

answer is B.

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Detailed Solution

Vapour  density  of AVapour  density  of B=Molar  mass  of AMolar  mass  of BMolar  mass  of A=2×M1

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