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

Options

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

Answer

A

Explanation

`underset2(PCl_(5))harrunderset0(PCl_(3))+underset0(Cl_(2))`
`(2xx60)/(100)` `(2xx40)/(100)` `(2xx40)/(100)`
Volume of container = 2 L
`K_(c) = ((2xx40)/(100xx2)xx(2xx40)/(100xx2))/((2xx60)/(100xx2)) = 0.266`