Question detail
In a reversible reaction at equilibrium, if the concentration of reactants is decreased, what will be the effect on the equilibrium position?
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. It will shift towards the reactants.
- B. It will shift towards the products.
- C. It will remain unchanged.
- D. It will shift to the left.
Answer
The correct option is It will shift towards the reactants..
Explanation
The correct option is "It will shift towards the reactants." because it supports the approved learning objective: (HT only) Predict that decreasing reactant concentration shifts equilibrium towards reactants. The other options are incorrect or weaker because they are vague, use the wrong Chemistry context, or do not clearly explain the answer for The effect of changing concentration (HT only).
Common mistake
Misunderstanding Equilibrium Shift
Students often think that decreasing reactant concentration will shift the equilibrium towards products instead of reactants.
Remember that according to Le Chatelier's Principle, decreasing the concentration of reactants will shift the equilibrium towards the side that produces more reactants to oppose the change.
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