Chemistry 9701 · 15 Halogen compounds
15.1 Halogenoalkanes
Describe halogenoalkane preparation, classification, nucleophilic substitution (SN1/SN2 mechanisms), elimination, and relative reactivities.
- Questions
- 192
- Years
- 2015–2026
- Multiple choice
- 141
- Written answer
- 51
- Average marks
- 4.5
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Where this subtopic appears
- Paper 1variants 11, 12, 13, 14141
- Paper 2variants 21, 22, 23, 2427
- Paper 4variants 41, 42, 4315
- Paper 5variants 51, 52, 537
- Paper 3variants 31, 322
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 11 | – | 11 |
| 2023 | 3 | 9 | 6 | 18 |
| 2022 | 2 | 11 | 6 | 19 |
| 2021 | 2 | 11 | 9 | 22 |
| 2020 | 1 | 11 | 7 | 19 |
| 2019 | 3 | 9 | 8 | 20 |
| 2018 | 3 | 9 | 13 | 25 |
| 2017 | 2 | 11 | 10 | 23 |
| 2016 | 2 | 6 | 7 | 15 |
| 2015 | – | 10 | 10 | 20 |
