In the reaction, PCl5 hArr PCl3 + Cl2, t...

In the reaction,` PCl_5 hArr PCl_3 + Cl_2`, the amounts of `PCl_5` `PCl_3` and `Cl_2` at equilibrium are 2 mole each and the total pressure is 3 atm. The equilibrium constant `K_p` is:

1 atm

2 atm

3 atm

6 atm

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