Chemistry 9701 · 6 Electrochemistry
6.1 Redox processes: electron transfer and changes in oxidation number (oxidation state)
Calculate oxidation numbers, balance redox equations, and define oxidation, reduction, disproportionation, and redox agents.
- Questions
- 303
- Years
- 2015–2026
- Multiple choice
- 172
- Written answer
- 131
- Average marks
- 6.5
Practise electrochemistry questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 13, 14172
- Paper 3variants 31, 32, 33, 34, 35, 36, 3866
- Paper 4variants 41, 42, 4328
- Paper 2variants 21, 22, 2324
- Paper 5variants 51, 52, 5313
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 20 | – | 20 |
| 2023 | 4 | 10 | 16 | 30 |
| 2022 | 4 | 16 | 11 | 31 |
| 2021 | 7 | 14 | 8 | 29 |
| 2020 | 6 | 17 | 11 | 34 |
| 2019 | 4 | 13 | 16 | 33 |
| 2018 | 8 | 12 | 14 | 34 |
| 2017 | 5 | 18 | 18 | 41 |
| 2016 | 3 | 11 | 12 | 26 |
| 2015 | – | 15 | 10 | 25 |
