Cambridge O Level Chemistry (5070) Paper 21, May/June 2026. Read the question paper free and work through it with an AI tutor that explains every question step by step.
| Exam board | Cambridge International Education |
|---|---|
| Qualification | Cambridge O Level |
| Subject | Chemistry |
| Syllabus code | 5070 |
| Paper | Paper 21 (5070/21) |
| Exam series | May/June 2026 · all 2026 papers |
| Questions | 8 |
| AI explanations | Available for every question |
The questions in this paper cover these Chemistry syllabus chapters:
| Topic | Questions |
|---|---|
| Chapter 2: Atoms, elements and compounds | 2 |
| Chapter 3: Stoichiometry | 3 |
| Chapter 5: Chemical energetics | 1 |
| Chapter 6: Chemical reactions | 1 |
| Chapter 7: Acids, bases and salts | 1 |
| Chapter 8: The Periodic Table | 1 |
| Chapter 9: Metals | 1 |
| Chapter 11: Organic chemistry | 2 |
Every question in 5070 Chemistry Paper 21 — May/June 2026 and the syllabus topic it tests. Ask the AI tutor about any of them by number, for example "Question 1".
| Question | Topic |
|---|---|
| Question 1 | Chapter 2: Atoms, elements and compounds |
| Question 2 | Chapter 3: Stoichiometry; Chapter 6: Chemical reactions |
| Question 3 | Chapter 3: Stoichiometry; Chapter 5: Chemical energetics |
| Question 4 | Chapter 2: Atoms, elements and compounds |
| Question 5 | Chapter 3: Stoichiometry; Chapter 7: Acids, bases and salts |
| Question 6 | Chapter 8: The Periodic Table; Chapter 9: Metals |
| Question 7 | Chapter 11: Organic chemistry |
| Question 8 | Chapter 11: Organic chemistry |
This paper tests 8 syllabus topics: Atoms, elements and compounds (2 questions), Stoichiometry (3 questions), Chemical energetics (1 question), Chemical reactions (1 question), Acids, bases and salts (1 question), The Periodic Table (1 question), Metals (1 question), Organic chemistry (2 questions).
Yes. Open the paper on Aixampapers and ask the AI tutor about any question: it explains each one step by step, written to what Cambridge examiners give marks for.
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The question paper is set by Cambridge International Education. Explanations on Aixampapers are written by its AI tutor and are not official Cambridge material; mark schemes are not published here. Aixampapers is independent and is not affiliated with or endorsed by Cambridge University Press & Assessment. How Aixampapers works.