Chemistry 0620 · 10 Chemistry of the environment
10.1 Water
Describe chemical tests for water, purity testing, water treatment processes, and identify beneficial and harmful substances in natural water sources.
- Questions
- 164
- Years
- 2010–2026
- Multiple choice
- 125
- Written answer
- 39
- Average marks
- 2.7
Practise chemistry of the environment questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 1389
- Paper 2variants 21, 22, 2347
- Paper 3variants 31, 32, 3319
- Paper 6variants 61, 62, 636
- Paper 4variants 433
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 3 | 7 | – | 10 |
| 2023 | 3 | 12 | 7 | 22 |
| 2022 | 1 | 3 | 7 | 11 |
| 2021 | 1 | 5 | 4 | 10 |
| 2020 | – | 9 | 2 | 11 |
| 2019 | 2 | 7 | 7 | 16 |
| 2018 | 2 | 8 | 3 | 13 |
| 2017 | 2 | 7 | 7 | 16 |
| 2016 | 3 | 4 | 6 | 13 |
| 2015 | 1 | 3 | 4 | 8 |
| 2014 | – | 5 | 4 | 9 |
| 2013 | – | 2 | 3 | 5 |
| 2012 | – | 3 | 4 | 7 |
| 2011 | – | 4 | 2 | 6 |
| 2010 | – | 4 | 3 | 7 |
