Question detail
In a reaction involving gases, what happens to the rate of reaction if the pressure is decreased?
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. The rate of reaction increases
- B. The rate of reaction decreases
- C. The rate of reaction remains the same
- D. The reaction stops completely
Answer
The rate of reaction decreases
Explanation
The correct answer is The rate of reaction decreases. This answer directly addresses the question: In a reaction involving gases, what happens to the rate of reaction if the pressure is decreased? 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 Pressure Effects
Students often think that increasing pressure will always increase the rate of reaction without considering the specific reaction conditions.
Emphasize that increasing pressure increases the concentration of gas molecules, leading to more frequent collisions, which generally increases the reaction rate.
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