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NTA Abhyas NEET2020ChemistryChemical EquilibriumPractice

0.6 mole of P C l 5 , 0.3 mole of P C l 3 and 0.4 mole of C l 2 are taken in a 1 L flask to obtain the following equilibrium P C l 5 ( g ) ⇌ P C l 3 ( g ) + C l 2 ( g ) If the equilibrium constant K c for the reaction is 0.15. Predict the direction of the reaction.

Options

  1. AForward direction
  2. BBackward direction
  3. CDirection of the reaction can not be predicted
  4. DReaction does not move in any direction

Correct answer

B. Backward direction

Step-by-step solution

P C l 5 ( g ) ⇌ P C l 3 ( g ) + C l 2 ( g ) Q c = 0.4 × 0.3 0.6 = 0.2 K c = 0.15 since Q c > K c reaction will proceed in backward direction.

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