passwella.
Menu

JAMB Chemistry 1982 Question 15

Question 15

Rates of Reaction

Which of the following combinations of conditions may increase the rate of a chemical reaction?

  1. A.Decrease in temperature, increase in concentration of the reactants
  2. B.Increase in temperature, addition of a catalyst, decrease in the surface area of the reactants
  3. C.Increase in temperature, increase in concentration, addition of a catalyst and increase in the surface area of the reactants
  4. D.Decrease in temperature concentration and surface area of the reactants.
  5. E.Addition of a catalyst and in the absence of light.
Show the answer and explanation

Answer: C (Increase in temperature, increase in concentration, addition of a catalyst and increase in the surface area of the reactants)

Explanation

Higher temperature, higher concentration, a catalyst and a larger surface area all speed up a reaction; option C is the only one with every factor in the helpful direction.