Chemistry 0620 · 12 Experimental techniques and chemical analysis
12.4 Separation and purification
Describe and suggest methods for separating and purifying mixtures, and assess substance purity using melting and boiling points.
- Questions
- 325
- Years
- 2010–2026
- Multiple choice
- 194
- Written answer
- 131
- Average marks
- 3.8
Practise experimental techniques and chemical analysis questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 13144
- Paper 2variants 21, 22, 2378
- Paper 6variants 61, 62, 6353
- Paper 3variants 31, 32, 3326
- Paper 5variants 51, 52, 5314
- Paper 4variants 41, 42, 4310
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 2 | 8 | – | 10 |
| 2023 | 3 | 13 | 12 | 28 |
| 2022 | 3 | 15 | 16 | 34 |
| 2021 | 2 | 8 | 8 | 18 |
| 2020 | – | 9 | 16 | 25 |
| 2019 | 7 | 6 | 18 | 31 |
| 2018 | 5 | 9 | 9 | 23 |
| 2017 | 5 | 13 | 12 | 30 |
| 2016 | 4 | 13 | 13 | 30 |
| 2015 | 5 | 5 | 4 | 14 |
| 2014 | – | 9 | 8 | 17 |
| 2013 | – | 7 | 13 | 20 |
| 2012 | – | 11 | 8 | 19 |
| 2011 | – | 9 | 9 | 18 |
| 2010 | – | 2 | 6 | 8 |
