Combined Science 5129
Cambridge O Level Combined Science 5129 — Chemical Reactions topical past papers
55 past-paper questions on Chemical Reactions for Combined Science 5129.
- Questions
- 55
- Years
- 2020–2026
- With mark scheme
- 100%
- Questions 2022–2026
- 50
Anyone can browse these pages. Opening the questions and their mark schemes takes a free Momentum account.
How Chemical Reactions has been examined
From 2022 to 2026, Chemical Reactions was on Paper 2 in 8 of 9 exam series, worth about 8% of that paper’s marks.
| Paper | Questions | Share of marks | Series |
|---|---|---|---|
| Paper 1 | 22 | 3% | 8 of 9 |
| Paper 2 | 22 | 8% | 8 of 9 |
| Paper 3 | 6 | 12% | 3 of 7 |
Momentum’s own count, over the questions in its bank for these years: a series is one exam session, every zone included, and a question filed under two chapters counts in both. Median marks per question: 4.
Filed in Momentum under: Chemical Reactions.
Practising in Momentum
- Every question in a chapter as one list, from every paper and year in the bank, newest first or shuffled.
- Each question turns over to its own part of the mark scheme, where the board published one.
- Narrow by paper, year, session, zone and marks, and star the questions worth keeping.
- Pick chapters, a number of questions and a time, and the exam builder draws a mock to sit and mark.
Past-paper questions and mark schemes are the copyright of Cambridge International. Momentum shows them to signed-in learners for revision and does not publish them on these pages.