Question 1
Question detail
How do catalysts affect the activation energy of a 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. They increase the activation energy
- B. They have no effect on activation energy
- C. They decrease the activation energy
- D. They change the reactants into products
Answer
They decrease the activation energy
Explanation
The correct answer is They decrease the activation energy. This answer directly addresses the question: How do catalysts affect the activation energy of a 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
Misunderstanding catalyst usage
Students think a catalyst is consumed during the reaction and therefore must be added in excess
Explain that a catalyst is not used up; it is only temporarily involved in the reaction pathway and can be recovered unchanged after the reaction
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