Question detail
Which of the following is NOT a reason why increasing temperature usually increases the rate of a chemical reaction?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Rate of reaction
Question
- A. It increases the average kineticenergy of the reactingparticles.
- B. It increases the collision frequency between reactant particles.
- C. It decreases the activation energy required for the reaction.
- D. It increases the proportion of collisions that have sufficient energy.
Answer
It decreases the activation energy required for the reaction.
Explanation
The correct answer is It decreases the activation energy required for the reaction.. This answer directly addresses the question: Which of the following is NOT a reason why increasing temperature usually increases the rate of a chemical reaction? It matches the approved Chemistry 8462 learning objective and the linked subtopic. The other options are incorrect because they either change the rate, catalyst, reversible reaction, equilibrium, or graph context, or they do not answer the exact point being tested.
Common mistake
Temperature effect misinterpreted
Students often think that increasing temperature always increases the rate of reaction, even for reactions that are endothermic or have a temperature-dependent equilibrium shift.
Explain that while higher temperature generally increases reaction rate by providing more kinetic energy and higher collision frequency, it can also shift equilibria or favour reverse reactions in some cases. Clarify that the temperature dependence of the rate is described by the Arrhenius equation and that the effect is not universal for all reactions.
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