Equal mass of methane and oxygen are mixed in an empty container at `25^(@)`C. The fraction of the total pressure exerted by oxygen is:

Options

A. `1:2`
B. `1:1`
C. `1:16`
D. `15:16`

Explanation

Let `30 g` of both be mixed.
Moles of `H_(2)=(30)/(2)=15`
Moles of `C_(2)H_(6)=(30)/(30)=1`
Mole fraction of `H_(2)=(15)/(1+15)=(15)/(16)`
which is also the fraction of total pressure executed by `H_(2)`.