Chemistry 9701 · 14 Hydrocarbons
14.1 Alkanes
Describe alkane production, combustion, free-radical substitution mechanism, cracking, unreactivity, and environmental impacts of combustion.
- Questions
- 102
- Years
- 2015–2026
- Multiple choice
- 67
- Written answer
- 35
- Average marks
- 5.2
Where this subtopic appears
- Paper 1variants 11, 12, 1367
- Paper 2variants 21, 22, 2324
- Paper 4variants 41, 42, 439
- Paper 5variants 51, 532
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 5 | – | 5 |
| 2023 | – | 8 | 3 | 11 |
| 2022 | 1 | 4 | – | 5 |
| 2021 | 3 | 3 | 5 | 11 |
| 2020 | 1 | 7 | 6 | 14 |
| 2019 | 1 | 3 | 7 | 11 |
| 2018 | 2 | 7 | 3 | 12 |
| 2017 | 3 | 3 | 1 | 7 |
| 2016 | 3 | 6 | 1 | 10 |
| 2015 | – | 10 | 6 | 16 |
