Question detail
Which exam-check sentence would most directly answer a question about chemistry only?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical cells and fuel cells (chemistry only)
Question
- A. chemistry only: correct Unit 4.5 answer for Cells and batteries
- B. Incorrect exam-check: gives a memorised phrase without subtopic detail
- C. Incorrect exam-check: omits the key Energy changes vocabulary
- D. Incorrect exam-check: answers a different objective from Chemical cells and fuel cells (chemistry only)
Answer
The correct option is chemistry only: correct Unit 4.5 answer for Cells and batteries.
Explanation
The correct option is chemistry only: correct Unit 4.5 answer for Cells and batteries. It directly supports the approved learning objective to (chemistry only) Describe that reactions in non-rechargeable cells stop when one reactant is used up. This exam-check version keeps the answer anchored to Cells and batteries within Chemical cells and fuel cells (chemistry only), and avoids mixing energy transfer, reaction profiles, activation energy, chemical cells, fuel cells, exothermic reactions and endothermic reactions unless the objective names them.
Common mistake
Non‑rechargeable cell stops when the electrolyte is exhausted
Students often think the reaction stops when the electrolyte is used up, rather than when one reactant (usually the metal electrode) is depleted
Explain that in a non‑rechargeable cell the reaction ceases when the active material on one electrode (e.g., the metal that is oxidised) is completely consumed, not when the electrolyte is exhausted
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