Question

Previous Years Questions
Equal moles of hydrogen and oxygen gases are
placed in a container with a pin-hole through which
both can escape. What fraction of the oxygen
escapes in the time required for one-half of the
hydrogen to escape?
[NEET-2016]
o
By
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Answer 1

let equal moles be x and y

then concentration of hydrogen escaped in unit time is x by 2

and that of oxygen is x by 32

but x=y

by grahams law of effusion/diffusion

then hydrogen escaped is x M. and then oxygen escaped in half time will x by 16

substitute x by 1

then answer will be 1 by 16