4 gm of sulphur dioxide gas diffuses from a container in 8 min. Mass of helium gas diffusing from the same container over the same time interval is :

Options

A. 0.5 gm
B. 1 gm
C. 2 gm
D. None of these

Answer

2

Explanation

`(n_(1).t_(2))/(n_(2).t_(1)) = sqrt((M_(2))/(M_(1))), (w_(1))/(M_(1)) xx (M_(2))/(W_(2)) = sqrt((M_(2))/(M_(1)))`
`(w_(1))/(w_(2)) = sqrt((M_(1))/(M_(2))) , (w_(1))/(4) = sqrt((4)/(64))`
`rArr w_(1) = 1 gm`