50 mL of hydrogen diffuses through a small hole from vessel in 20 minutes time. Time taken for 4 mL of oxygen to diffuse out under similar conditions will be

Options

A. 12 min
B. 64 min
C. 8 min
D. 32 min

Answer

B

Explanation

`(V_(1))/(t_(1)).(t_(2))/(V_(2)) = sqrt((M_(2))/(M_(1)))`
or `(50)/(20).(t_(2))/(40) = sqrt((32)/(2)) = 4`
`t_(2) = (4 xx 20 xx 40)/(500) = 64 min`