Question

0.6 moles of `PCl_(5)`, 0.3 mole of `PCl_(3)` and 0.5 mole of `Cl_(2)` are taken in a 1 L flask to obtain the following equilibrium ,
`PCl_(5(g))rArrPCl_(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.

Answer 1

Correct Answer - B
`PCl_(5(g))hArrPCl_(3(g))+Cl_(2(g))`
`Q_(c)=(0.5xx0.3)/(0.6)=0.25`
`K_(c)=0.2`, Since, `Q_(c)gtK_(c)` reaction will proceed in backward direction.