Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 Oct/Nov 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Oct/Nov 2025: the question paper and its official mark scheme, 6 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 6
- Marks
- 80
- Grade A from
- 48
File names: 0620_w25_qp_42 · 0620_w25_ms_42
Grade thresholds for 0620/42 Oct/Nov 2025
The minimum raw marks Cambridge set for each grade on this component (out of 80). Thresholds change every session and variant, so always compare your score with the paper you actually sat.
| A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|
| 48 | 36 | 24 | 20 | 14 | 10 | 6 |
Topics in this paper
Which syllabus chapters 0620/42 Oct/Nov 2025 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 2 | 28 |
| Metals | 1 | 19 |
| Chemistry of the environment | 1 | 13 |
| Organic chemistry | 1 | 12 |
| Stoichiometry | 1 | 8 |
Questions in 0620/42 Oct/Nov 2025
- Question 1
The three states of matter are solid, liquid and gas. (a) Complete Table 1.1 to describe the structures of solids, liquids and gases in terms of particle separation, particle arrangement and particle motion. Table 1.1 state of matter particle separation …
- Question 2
Iron is extracted from iron ore in a blast furnace. (a) The iron compound in the main iron ore used in the blast furnace is iron(III) oxide. (i) State the name of the main iron ore used in the blast …
- Question 3
A student prepares a sample of the insoluble salt barium sulfate, BaSO4. The student adds aqueous sodium sulfate, Na2SO4(aq), to aqueous barium chloride, BaCl 2(aq). The student carries out the following steps. step 1 Dissolve 0.100 moles of solid BaCl …
- Question 4
Nitric acid, HNO3 , and sulfuric acid, H2SO4 , are strong acids. Ethanoic acid, CH3COOH, is a weak acid. (a) One mole of each acid is added separately to 1000 cm3 of distilled water to form a dilute solution. All …
- Question 5
This question is about the homologous series of alkanes. Three general characteristics of alkanes are: • they are generally unreactive because they do not have a functional group • they show trends in their physical properties, such as melting points …
- Question 6
Compound E shown in Fig. 6.1 is an ester. CH3 CH2 CH2 CH2 CH3 …
Other Chemistry papers from Oct/Nov 2025
- 0620/11 Multiple choice (Core)
- 0620/12 Multiple choice (Core)
- 0620/13 Multiple choice (Core)
- 0620/21 Multiple choice (Extended)
- 0620/22 Multiple choice (Extended)
- 0620/23 Multiple choice (Extended)
- 0620/31 Theory (Core)
- 0620/32 Theory (Core)
- 0620/33 Theory (Core)
- 0620/41 Theory (Extended)
- 0620/43 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical