5 moles of `SO_(2)` and 5 moles of `O_(2)` are allowed to react, At equilibrium, it was found that 60% of `SO_(2)` is used up. If the partial pressure of the equilibrium mixture is one atmosphere, the partial pressure of `O_(2)` is

Options

A. 0.52 atm
B. 0.21 atm
C. 0.41 atm
D. 0.82 atm

Answer

C

Explanation

`2SO_(2(g))+O_(2(g))hArr2SO_(3(g))`
Initially `5" "5" "0`
Degree of dissociation =0.60
`:.` no. of moles of `SO_(2)` at equilibrium =2
no. of moles of `O_(2)` at equilibrium =3.5
no. of moles of `SO_(3)` produced at equilibrium =3
`:.p_(O_(2))=(3.5xx1)/8.5=0.41` atm