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In a 500 mL flask, the degree of dissoci...

In a 500 mL flask, 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

1.33

B

2.66

C

5.32

D

4.66

Text Solution

Verified by Experts

The correct Answer is:
B

`K_(C)=([PCl_(3)](Cl_(2)])/([PCl_(5)])=(((2)/(0.5))((2)/(0.5)))/(((3)/(0.5)))=(8)/(30)=2.66`
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