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0.6 mole of PCl5, 0.3 mole of PCI3 and 0...

0.6 mole of `PCl_5,` 0.3 mole of `PCI_3` and 0.5 mole of `Cl_2` are taken in a 1 L flask to obtain the following equilibrium: `PCl_(5(g)) Leftrightarrow PCl_(3(g))+Cl_(2(g))` If the equilibrium constant `K_c` for the reaction is 0.2. Predict the direction of the reaction.

A

Forward direction

B

Backward direction

C

Direction of the reaction cannot be predicted

D

Reaction does not move in any direction.

Text Solution

Verified by Experts

The correct Answer is:
B
`PCl_(5(g)) Leftrightarrow PCl_(3(g)) +Cl_(2(g))`
`Q_(c)=(0.5 xx 0.3)/(0.6)=0.25`
`K_(c)` =0.2, Since, `Q_(c) gt K_(c)`, reaction will proceed in backward direction.
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