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JAMB Chemistry 2001 Question 25

Question 25

Rates of Reaction

Which of the following best explains the increase in the rate of a chemical reaction as the temperature rises?

  1. A.The bonds in the reacting molecules are more readily broken.
  2. B.The molecular collisions become more violent.
  3. C.A lower proportion of the molecules has the necessary minimum energy to react.
  4. D.The collision frequency of the molecules increases.
Show the answer and explanation

Answer: D (The collision frequency of the molecules increases.)

Explanation

Heating makes the molecules move faster, so they collide more often (and more of the collisions have enough energy), which speeds up the reaction.