The pressure of a `1:4` mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen ?

Options

A. `0.8 xx 10^(5) `atm
B. `0.008 Nm^(-2)`
C. `8 xx 10^(4) Nm^(-2)`
D. 0.25 atm

Answer

C

Explanation

Partial pressure of `O_(2) = ` Mole fraction of `O_(2) xx` Total pressure of mixture
`= ( 4)/( 5) xx1 = 0.8 xx 10^(5) Nm^(-2)`
or `= 8 xx 10^(4) Nm^(-2)`