Question detail
Which of the following describes a key advantage of hydrogen fuel cells compared to 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. Hydrogen fuel cells can be recharged quickly.
- B. Hydrogen fuel cells produce only water as a byproduct.
- C. Hydrogen fuel cells are lighter than rechargeable batteries.
- D. Hydrogen fuel cells can operate without any fuel supply.
Answer
Hydrogen fuel cells produce only water as a byproduct.
Explanation
One of the main advantages of hydrogen fuel cells is that their only product is water, making them environmentally friendly.
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
Related flashcards
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