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JAMB Chemistry 2009 Question 30

Question 30

Chemical Equilibrium

The equilibrium of an endothermic reaction which proceeds with an increase in volume can be shifted in the reverse direction by

  1. A.increasing the temperature and decreasing the pressure
  2. B.increasing the pressure and increasing the temperature
  3. C.decreasing the temperature and increasing the pressure
  4. D.decreasing the pressure and decreasing the temperature
Show the answer and explanation

Answer: C (decreasing the temperature and increasing the pressure)

Explanation

Lowering temperature opposes an endothermic forward reaction, and raising pressure favours the side with smaller volume (the reactants).