2 moles of `PCl_(5)` was heated in a closed vessel of 2 litre capacity. At equilibrium, `40%` of `PCl_(5)` is dissociated it `PCl_(3)` and `Cl_(2)`. The value of equilibrium constant is

Options

A. `0.266`
B. `0.53`
C. `2.66`
D. `5.3`

Answer

A

Explanation

`{:(PCl_(5),hArr,PCl_(3),+,Cl_(2)),(2,,0,,0):}`
`(2xx60)/(100)` `(2xx40)/(100)` `(2xx40)/(100)`
volume of container = 2L
`K_(c) = ((2xx40)/(100xx2)xx(2xx40)/(100xx2))/((2xx60)/(100xx2))= 0.266`