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4.0 moles of argon and 5.0 moles of PCl(...

4.0 moles of argon and 5.0 moles of `PCl_(5)` are introduced into an evacuated flask of 100 litre capacity at 610K. The system is allowed to equilibrate. At equilibrium, the total pressure of mixture was found to be 6.0 atm. The `K_(p)` for the reaction is [Given : `R= 0.0821 L " atm " K^(-1) mol^(-1)`]

A

2.25

B

6.24

C

12.13

D

15.24

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