Chemistry 9701 · 17 Carbonyl compounds
17.1 Aldehydes and ketones
Describe carbonyl preparation, reduction, nucleophilic addition with HCN, detection with 2,4-DNPH, Tollens'/Fehling's tests, and tri-iodomethane reaction.
- Questions
- 289
- Years
- 2015–2026
- Multiple choice
- 231
- Written answer
- 58
- Average marks
- 3.5
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Where this subtopic appears
- Paper 1variants 11, 12, 13, 14231
- Paper 2variants 21, 22, 2336
- Paper 4variants 41, 42, 4312
- Paper 3variants 31, 33, 34, 368
- Paper 5variants 51, 532
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 16 | – | 16 |
| 2024 | – | – | 1 | 1 |
| 2023 | 3 | 14 | 14 | 31 |
| 2022 | 4 | 11 | 13 | 28 |
| 2021 | 5 | 14 | 9 | 28 |
| 2020 | 4 | 16 | 12 | 32 |
| 2019 | 4 | 13 | 14 | 31 |
| 2018 | 6 | 13 | 10 | 29 |
| 2017 | 6 | 16 | 14 | 36 |
| 2016 | 4 | 14 | 15 | 33 |
| 2015 | – | 10 | 14 | 24 |
