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JAMB Chemistry 1984 Question 10

Question 10

Rates of Reaction

Which combination of the following statements is correct?
1. lowering the activation energy
2. conducting the reaction in a gaseous state
3. increasing the temperature
4. removing the products as soon as they are formed
5. powdering the reactant if solid

  1. A.1, 2 and 3
  2. B.1, 3 and 5
  3. C.2, 3 and 5
  4. D.3 and 4
  5. E.3 and 5
Show the answer and explanation

Answer: B (1, 3 and 5)

Explanation

The rate of a reaction is increased by lowering the activation energy (a catalyst), raising the temperature and increasing the surface area of a solid by powdering it. Removing products changes the yield at equilibrium, not the rate.