A vessel contains double the number of moles of hydrogen than oxygen. Due to a hole in the vessel, one-fouth of the gaseous mixture is effused out. What is the ratio of the number of moles of hydrogen and oxygen remaining in the vessel ?

Explanation

(i) relation between number of moles of gases
(ii) relation between number of moles of gases effused and molecular weight
(iii) comparison of number of moles of `H_(2) and O_(2)` effused
(iv) calculation of number of moles of `H_(2) and O_(2)` left over
(v) ` 28 : 17`