Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/21 May/June 2026 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2026: the question paper and its official mark scheme, 8 questions worth 80 marks. Free to open, no account needed.
- Questions
- 8
- Marks
- 80
File names: 5070_s26_qp_21 · 5070_s26_ms_21
Topics in this paper
Which syllabus chapters 5070/21 May/June 2026 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Organic chemistry | 2 | 16 |
| Acids, bases and salts | 1 | 14 |
| Stoichiometry | 1 | 12 |
| Metals | 1 | 12 |
| Electrochemistry | 1 | 11 |
| Chemical energetics | 1 | 10 |
| Atoms, elements and compounds | 1 | 5 |
Questions in 5070/21 May/June 2026
- Question 1
Choose from the following compounds to answer the questions. Al Cl 3 CH4 C2H4 CO2 KBr NH2OH NO Na2O SO2 ZnO Each compound can be used once, more than once or not at all. State which compound: (a) is amphoteric …
- Question 2
Sodium azide, NaN3, decomposes when heated to make sodium and nitrogen. 2NaN3(s) 2Na(s) …
- Question 3
Hydrogen reacts with oxygen to make water. …
- Question 4
Potassium iodide is an ionic compound. (a) Concentrated and dilute aqueous potassium iodide are separately electrolysed using graphite electrodes. Complete Table 4.1 about the products of the two electrolysis reactions. Table 4.1 concentrated aqueous potassium iodide dilute aqueous potassium iodide …
- Question 5
Aluminium sulfate is prepared by reacting excess aluminium with hot dilute sulfuric acid. 2Al (s) + 3H2SO4(aq) Al 2(SO4)3(aq) …
- Question 6
Iron is a transition element. Iron has good electrical conductivity. (a) State two chemical properties that are typical of a transition element. …
- Question 7
Proteins are natural condensation polymers. Figure 7.1 shows a section of a protein. …
- Question 8
This question is about alcohols. (a) Describe the manufacture of ethanol from ethene. Include a symbol equation and the conditions for the manufacture. (b) Draw the displayed formula of butan-2-ol. (c) Ethanol reacts with propanoic acid to form an ester. …
Other Chemistry papers from May/June 2026
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical