Chemistry 5070 · 12 Experimental techniques and chemical analysis
12.3 Chromatography
Explain paper chromatography, the use of locating agents for colourless substances, and how to interpret chromatograms and calculate Rf values.
- Questions
- 43
- Years
- 2004–2026
- Multiple choice
- 28
- Written answer
- 15
- Average marks
- 3.1
Practise experimental techniques and chemical analysis questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 01, 11, 1223
- Paper 4variants 04, 41, 4217
- Paper 2variants 02, 223
Questions by year
| Year | May/June | Oct/Nov | Total |
|---|---|---|---|
| 2026 | 3 | – | 3 |
| 2023 | 3 | 1 | 4 |
| 2022 | 1 | – | 1 |
| 2021 | – | 1 | 1 |
| 2020 | 4 | 3 | 7 |
| 2019 | 3 | 1 | 4 |
| 2018 | 1 | 1 | 2 |
| 2017 | 1 | 2 | 3 |
| 2016 | 2 | 2 | 4 |
| 2013 | 1 | 1 | 2 |
| 2012 | 2 | – | 2 |
| 2011 | – | 1 | 1 |
| 2009 | 2 | – | 2 |
| 2008 | 1 | 1 | 2 |
| 2007 | 1 | 2 | 3 |
| 2004 | – | 2 | 2 |
