Chemistry 0620 · 4 Electrochemistry
4.2 Hydrogen–oxygen fuel cells
Describe how hydrogen-oxygen fuel cells produce electricity and water, and evaluate their advantages and disadvantages compared to gasoline engines.
- Questions
- 53
- Years
- 2010–2026
- Multiple choice
- 43
- Written answer
- 10
- Average marks
- 2.9
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Where this subtopic appears
- Paper 2variants 21, 22, 2325
- Paper 1variants 11, 12, 1318
- Paper 3variants 32, 335
- Paper 4variants 41, 42, 435
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 1 | 4 | – | 5 |
| 2023 | 1 | 6 | 5 | 12 |
| 2022 | 1 | 2 | – | 3 |
| 2021 | 1 | 1 | 3 | 5 |
| 2020 | – | 4 | 7 | 11 |
| 2019 | 1 | 3 | 4 | 8 |
| 2018 | 2 | – | – | 2 |
| 2017 | – | – | 1 | 1 |
| 2015 | – | 1 | 1 | 2 |
| 2014 | – | – | 1 | 1 |
| 2012 | – | – | 1 | 1 |
| 2010 | – | 2 | – | 2 |
