Chemistry 0620 · 12 Experimental techniques and chemical analysis
12.5 Identification of ions and gases
Describe chemical and flame tests to identify key anions, aqueous cations, and gases.
- Questions
- 478
- Years
- 2010–2026
- Multiple choice
- 181
- Written answer
- 297
- Average marks
- 7
Practise experimental techniques and chemical analysis questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 13138
- Paper 6variants 61, 62, 63110
- Paper 3variants 31, 32, 3375
- Paper 5variants 51, 52, 5370
- Paper 2variants 21, 22, 2357
- Paper 4variants 41, 42, 4328
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 9 | 20 | – | 29 |
| 2024 | – | 1 | – | 1 |
| 2023 | 6 | 18 | 22 | 46 |
| 2022 | 3 | 18 | 12 | 33 |
| 2021 | 5 | 17 | 14 | 36 |
| 2020 | – | 14 | 11 | 25 |
| 2019 | 8 | 18 | 20 | 46 |
| 2018 | 6 | 16 | 24 | 46 |
| 2017 | 9 | 21 | 19 | 49 |
| 2016 | 5 | 13 | 20 | 38 |
| 2015 | 4 | 12 | 12 | 28 |
| 2014 | – | 10 | 12 | 22 |
| 2013 | – | 5 | 9 | 14 |
| 2012 | – | 15 | 12 | 27 |
| 2011 | – | 12 | 12 | 24 |
| 2010 | – | 5 | 9 | 14 |
