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JAMB Chemistry 2001 Question 23

Question 23

Chemical Equilibrium

P(g) + Q(g) ⇌ 3R(s) + S(g) ΔH is negative
Which of the following will increase the yield of R?

  1. A.Using a larger closed vessel.
  2. B.Increasing the temperature
  3. C.Removing some S.
  4. D.Adding a positive catalyst.
Show the answer and explanation

Answer: C (Removing some S.)

Explanation

Removing the product S makes the equilibrium shift to the right to replace it, forming more R. A larger vessel and a higher temperature both shift it to the left; a catalyst does not change the yield.