Question detail
For Fuel cells, which answer best supports this AQA GCSE Chemistry Unit 4.5 objective: (chemistry only) Compare fuel supply, products, rechargeability and operating use for fuel cells and rechargeable batteries?
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 Fuel cells
- B. Incorrect: confuses chemistry only with a nearby Energy changes idea
- C. Incorrect: gives a general chemistry statement without linking to Fuel cells
- 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 Fuel cells.
Explanation
The correct option is chemistry only: correct Unit 4.5 answer for Fuel cells. It directly supports the approved learning objective to (chemistry only) Compare fuel supply, products, rechargeability and operating use for fuel cells and rechargeable batteries. This keeps the answer anchored to Fuel cells 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 fuel supply in fuel cells
Students often think a fuel cell needs a continuous external supply of oxygen and water, just like a battery needs a continuous supply of reactants
Explain that a fuel cell requires only the fuel (e.g. hydrogen) and an oxidiser (usually oxygen from air); water is a product, not a required input, and the cell can operate as long as fuel and oxygen are available
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