Question detail
When the temperature of a gas-phase reaction is increased, what happens to the collision frequency?
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 decreases because the gas expands.
- B. It remains the same because pressure is unchanged.
- C. It increases because the gas molecules move faster.
- D. It decreases because the molecules are more likely to escape.
Answer
It increases because the gas molecules move faster.
Explanation
The correct answer is It increases because the gas molecules move faster.. This answer directly addresses the question: When the temperature of a gas-phase reaction is increased, what happens to the collision frequency? 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 and Collision Frequency
Students often think that increasing temperature directly increases the number of particles available for collisions, rather than just increasing their speed.
Remember that increasing temperature increases the speed of particles, which leads to more frequent collisions, not necessarily more particles.
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