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A gas diffuses 1//5 times as fas as hydr...

A gas diffuses `1//5` times as fas as hydrogen. Its molar mass is `:`

A

25

B

50

C

`25 sqrt( 2)`

D

`50 sqrt( 2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`( r ( gas))/( r ( H_(2))) = sqrt(( 2)/( M ( gas )))`
`( 1//5)/( 1) = sqrt((2 )/( M ( gas)))`
or ` ( 1)/( 25) = ( 2)/( M ( gas))`
or M ( gas ) = ` 2 xx 25 = 50`
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