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Equilibrium constant for the reaction $P C L_{5} ⇋ P C L_{3} + C L_{2}$ is 0.0205 at 230°C and 1 atmospheric pressure if at equilibrium concentration of $P C L_{5}$ is 0.235 moles $l i t e r^{- 1}$ and that of $C L_{2}$ = 0.028 moles $l i t^{- 1}$ then conc. of $P C L_{3}$ at equilibrium is

A. 0.0174

B. 0.174

C. 0.0348

D. 1.74

Correct Answer :

A. 0.0174

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