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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

`6.50 u`

B

`25.00 u`

C

`50.00 u`

D

`12.25 u`

Text Solution

Verified by Experts

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