Question detail
What happens to the concentrations of reactants and products at equilibrium in a closed system?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reversible reactions and dynamic equilibrium
Question
- A. They increase indefinitely.
- B. They remain constant.
- C. They decrease to zero.
- D. They fluctuate constantly.
Answer
They remain constant.
Explanation
The correct answer is They remain constant.. This answer directly addresses the question: What happens to the concentrations of reactants and products at equilibrium in a closed system? 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
Misuse of Reversible Reaction Symbol
Students often forget to use the reversible reaction symbol (⇌) in equations, leading to confusion about the nature of the reaction.
Always include the reversible reaction symbol (⇌) to indicate that the products can revert to the original reactants.
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