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Q.

The rate of diffusion of gas A is double that of the gas B. The ratio of their molecular weights is

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a

1:4

b

1:2

c

4:1

d

2:1

answer is B.

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Detailed Solution

As per given statement,

rA=2 rB

rArB=MBMA

⇒2rBrB=MBMA

⇒21=MBMA

⇒MBMA=41

so, MA:MB=1:4

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