Chemistry 9701 · 8 Reaction kinetics
8.3 Homogeneous and heterogeneous catalysts
Explain catalyst action, construct reaction pathway diagrams, and illustrate catalytic effects using Boltzmann distributions.
- Questions
- 104
- Years
- 2015–2026
- Multiple choice
- 72
- Written answer
- 32
- Average marks
- 4.5
Practise reaction kinetics questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 1372
- Paper 4variants 41, 42, 4317
- Paper 2variants 21, 22, 239
- Paper 3variants 33, 34, 364
- Paper 5variants 51, 532
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 3 | – | 3 |
| 2023 | 2 | 2 | 3 | 7 |
| 2022 | 1 | 5 | 6 | 12 |
| 2021 | 3 | 4 | 2 | 9 |
| 2020 | 3 | 10 | 2 | 15 |
| 2019 | 2 | 5 | 6 | 13 |
| 2018 | 1 | 8 | 7 | 16 |
| 2017 | 5 | 5 | 6 | 16 |
| 2016 | – | 4 | 6 | 10 |
| 2015 | – | 3 | – | 3 |
