Electrochemistry · Cambridge O Level 5070
4.2 Hydrogen-oxygen fuel cells
4.2 Hydrogen-oxygen fuel cells appeared in 5 of the 6 years from 2020–2025, worth 41 marks across 13 questions — about 3.15 marks each.
Based on 95 real Cambridge past papers, 2020–2025.
Questions per year
How many Chemistry questions tagged to this topic appeared each year.
- 20203
- 20211
- 20220
- 20233
- 20243
- 20253
Appearance history
- Most recent
- 2025
- First in range
- 2020
- Years since last
- 0
- Longest gap
- 1 year
Historical occurrence only — not an exam prediction.
Related topics
Topics that most often share a question with this one.
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