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

Options

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

Answer

D

Explanation

`{:(,2SO_(2)(g),+,O_(2)(g),hArr,2SO_(3)(g)),("Initially",5,,5,,0),("Used up",(5xx60)/(100)=3,,3xx(1)/(2)=1.5,,1.5xx2=3),("At eqm. ",5-3=2,,5-1.5=3.5,,):}`
`:. p_(O_(2))=("Moles of" O_(2))/("Total no. of moles" )xx"Total pressure "`
`=(3.5)/(2+3.5+3)xx1=(3.5)/(8.5)xx1=0.41 "atm."`