Chemistry · May / June 2026 · Paper 12 · Question 11

Which statement comparing hydrogen–oxygen fuel cells with gasoline/petrol engines is correct?

1. AA disadvantage of a hydrogen–oxygen fuel cell is that hydrogen is more difficult to store than gasoline/petrol.
2. BA disadvantage of a hydrogen–oxygen fuel cell is that it is less efficient than a gasoline/petrol engine.
3. CAn advantage of a hydrogen–oxygen fuel cell is that it only produces carbon dioxide and water as products.
4. DAn advantage of gasoline/petrol engines is that they produce carbon monoxide by incomplete combustion.

As printed in the paper