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JAMB Chemistry 2009 Question 29

Question 29

Chemical Equilibrium

CuO(s) + H2(g) ⇌ Cu(s) + H2O(l)
What is the effect of increasing the pressure on the equilibrium reaction above?

  1. A.The equilibrium is shifted to the left
  2. B.The equilibrium is shifted to the right
  3. C.There is no effect
  4. D.More H2(g) is produced
Show the answer and explanation

Answer: B (The equilibrium is shifted to the right)

Explanation

As written, the only gas is H2 on the left. Increasing pressure favours the side with fewer gas molecules, which is the right.