Question detail
For Cells and batteries, which answer best supports this AQA GCSE Chemistry Unit 4.5 objective: (chemistry only) Explain that rechargeable cells and batteries can be recharged because their chemical reactions are reversed by an external electrical current?
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: confuses chemistry only with a nearby Energy changes idea
- C. Incorrect: gives a general chemistry statement without linking to Cells and batteries
- D. Incorrect: reverses the energy-change relationship in 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) Explain that rechargeable cells and batteries can be recharged because their chemical reactions are reversed by an external electrical current. This 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
Misunderstanding Rechargeability
Students often think that rechargeable cells can be recharged indefinitely without any loss of capacity.
Explain that while rechargeable cells can be recharged multiple times, their capacity decreases over time due to chemical degradation.
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