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Chemistry · May / June 2024 · Paper 12 · Question 13

5070Hydrogen–oxygen fuel cells

Which row describes a hydrogen-oxygen fuel cell?

  1. Ahydrogen and oxygen; hydrogen has a lower energy content by mass than petrol
  2. Bhydrogen and oxygen; a renewable fuel may be used in a fuel cell, a petrol engine uses a non-renewable fuel
  3. Cwater only; hydrogen has a lower energy content by mass than petrol
  4. Dwater only; a renewable fuel may be used in a fuel cell, a petrol engine uses a non-renewable fuel

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Correct answer: D. water only; a renewable fuel may be used in a fuel cell, a petrol engine uses a non-renewable fuel

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