A mixture of nitrogen and hydrogen in the ratio of `1: 3` reach equilibrium with ammonia, when `50 %` of the mixture has reacted. If the total pressure is `P`, the partial pressure of ammonia in the equilibrium mixture was :

Options

A. `P//2`
B. `P//3`
C. `P//4`
D. `P//6`

Explanation

`underset( :. 0.5)underset((1-x))underset(1)(N_(2))+underset(1.5)underset((3-3x))underset(3)(3H_(2))hArrunderset(1.0)underset(2x( :'x=0.5))underset(0)(2NH_(3))`
Thus `P_(NH_(3))=P_(T)xx` Mole fraction of `NH_(3)`
`=Pxx(1)/(3)=(P)/(3)`