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Unilorin Post-UTME Chemistry 2024 (Model questions) Question 5

Question 5

Rates of Reaction

A catalyst increases the rate of a reaction by

  1. A.shifting the equilibrium position
  2. B.increasing the equilibrium constant
  3. C.lowering the activation energy
  4. D.increasing the enthalpy change
Show the answer and explanation

Answer: C (lowering the activation energy)

Explanation

A catalyst gives the reaction an alternative route with a lower activation energy; it does not change the equilibrium or the enthalpy change.