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Two gases A and B having the same volume...

Two gases `A` and `B` having the same volume diffuse through a porous partition in `20` and `10` seconds respectively. The molar mass of `A` is `49 u`. Molar mass of `B` will be

A

50.0 u

B

12.25 u

C

6.50 u

D

25.0 u

Text Solution

Verified by Experts

The correct Answer is:
B
`(r_(A))/(r_(B))=sqrt((M_(B))/(M_(A)))`
`(V//20)/(V//10)=sqrt((M_(B))/(49)) therefore M_(B)=49xx(1)/(4)=12.25u`
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