Question detail
What effect does increasing concentration have on the rate of 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 decreases the number of collisions.
- B. It increases the rate of reaction.
- C. It has no effect on the reaction rate.
- D. It only affects gas reactions.
Answer
It increases the rate of reaction.
Explanation
The correct answer is It increases the rate of reaction.. This answer directly addresses the question: What effect does increasing concentration have on the rate of 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
Misattributing increased rate to more collisions only
Students often think that a higher concentration or temperature always speeds up a reaction simply because there are more collisions, ignoring that the collisions must also have sufficient energy.
Explain that collision theory requires both a higher collision frequency *and* a higher proportion of collisions with energy ≥ activation energy; students should describe how temperature raises particle speeds, increasing both frequency and the fraction of energetic collisions, and how concentration or pressure increases frequency but not necessarily energy per collision.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.