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In a 500mL falsk, the degree of dissocia...

In a 500mL falsk, the degree of dissociation of `PCI_(5)` at equilibrium is `40%` and the initial amount is 5 moles. The value of equilibrium constant in mol `L^(-1)` for the decomposition of `PCI_(5)` is

A

2.33

B

2.66

C

5.32

D

4.66

Text Solution

Verified by Experts

The correct Answer is:
B
`PCl_(5) rarr PCl_(3) + Cl_(2)`
`K_(c) = [PCl_(3)][Cl_(2)]/[PCl_(5)] = (2/0.5 xx 2/0.5)/((0.5 xx 0.5)/3//0.5) = 2.66`
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