Hydrogen–oxygen fuel cells: past paper questions
Real questions on hydrogen–oxygen fuel cells
The newest 14 of 14 written questions. Open one to see it on the real paper.
- 0620/31 · May/June 2026 · Q1a(iii)[1]
is made in a fuel cell
See it on the paper → - 0620/33 · October/November 2025 · Q1c[1]
reacts with hydrogen in a fuel cell
See it on the paper → - 0620/32 · February/March 2025 · Q1a(vi)[1]
an element used as a reactant in a fuel cell.
See it on the paper → - 0620/33 · October/November 2024 · Q1a(iii)[1]
is a reactant in a fuel cell
See it on the paper → - 0620/41 · October/November 2024 · Q5a(i)[1]
Name the substance which combines with hydrogen in a fuel cell.
See it on the paper → - 0620/41 · October/November 2024 · Q5a(ii)[2]
Give one advantage and one disadvantage of using fuel cells instead of gasoline in vehicle engines. advantage
See it on the paper → - 0620/33 · October/November 2023 · Q1e[1]
is the product formed in a hydrogen–oxygen fuel cell
See it on the paper → - 0620/43 · May/June 2023 · Q5d(ii)[1]
State one disadvantage, other than cost, of using hydrogen–oxygen fuel cells to power cars compared to using petrol. [Total: 16]
See it on the paper → - 0620/43 · May/June 2023 · Q6b(i)[2]
he first stage is the conversion of ammonia into nitrogen monoxide, NO. T The equation is shown. 4NH 3 (g) + 5O 2 (g) 4NO(g) + 6H 2 O(g) The reaction is carried out at a temperature of 900 °C and a pressure of 7 atm. The forward reaction is exothermic. Using explanations that do not involve cost: ● explain why a...
See it on the paper → - 0620/42 · February/March 2022 · Q4c(i)[1]
Name the reactants in a fuel cell.
See it on the paper → - 0620/42 · February/March 2022 · Q4c(ii)[1]
Name the waste product of a fuel cell.
See it on the paper → - 0620/42 · February/March 2020 · Q1e[1]
Hydrogen fuel cells can be used to power vehicles. Write the word equation for the overall reaction that takes place in a hydrogen fuel cell. [Total: 13]
See it on the paper → - 0620/21 · May/June 2019 · Q11[1]
Which statement about the hydrogen fuel cell is not correct?
See it on the paper → - 0620/21 · May/June 2019 · Q29[1]
What happens to the oxides of nitrogen in the catalytic converter?
See it on the paper →
What examiners said
Many candidates could not recall an element used as a reactant in fuel cells. The most common incorrect answer was H2O.
— Examiner report, February/March 2025, 0620/32 Q1(a)(vi) (Cambridge)
This question proved to be the most difficult on the paper. Most candidates struggled to give a sensible disadvantage for the use of hydrogen−oxygen fuel cells. Many did not read the question properly and gave an advantage instead. The best answers focused on the difficulties of storing or transporting hydrogen as it is a gas and must be stored under high pressure, or the lack of infrastructure or...
— Examiner report, May/June 2023, 0620/43 Q5(d)(ii) (Cambridge)
Candidates found this question very challenging and struggled with why a given temperature and pressure were not used, rather than what happens when a temperature or pressure is changed. Candidates were able to answer each part of the question in two possible ways: what would happen if the new condition was applied to the reaction, or why the original condition should still be used instead. Candid...
— Examiner report, May/June 2023, 0620/43 Q6(b)(i) (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.