Post-UTME Chemistry 2011 Objective — Question 8

Question 8 of 10 from the Post-UTME Screening (Post-UTME) Chemistry 2011 Objective paper, with the correct answer and a full explanation.

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

A. The bonds in the reacting molecules are more readily broken
B. The molecular collisions become more violent
C. A lower proportion of the molecules has the necessary minimum energy to react
D. The collision frequency of the molecules increasesCorrect

Explanation

Per the source key, increased collision frequency is marked as the answer; note most textbooks primarily attribute the rate increase to a greater proportion of molecules exceeding the activation energy, so this is worth double-checking against your syllabus.

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