Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/41 Oct/Nov 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 1, Oct/Nov 2025: the question paper and its official mark scheme, 5 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 5
- Marks
- 80
- Grade A from
- 50
File names: 0620_w25_qp_41 · 0620_w25_ms_41
Grade thresholds for 0620/41 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 |
|---|---|---|---|---|---|---|
| 50 | 39 | 26 | 22 | 17 | 13 | 9 |
Topics in this paper
Which syllabus chapters 0620/41 Oct/Nov 2025 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Atoms, elements and compounds | 2 | 30 |
| Organic chemistry | 1 | 20 |
| Chemical energetics | 1 | 16 |
| Acids, bases and salts | 1 | 14 |
Questions in 0620/41 Oct/Nov 2025
- Question 1
Protons, neutrons and electrons are particles found in atoms. (a) Complete Table 1.1 to show the relative mass and relative charge of a proton, a neutron and an electron. Table 1.1 particle relative mass relative charge proton +1 neutron electron …
- Question 2
Calcium is an element in Group II of the Periodic Table. (a) Identify the element in Group II which has only five occupied electron shells. (b) Name and describe the type of bonding found in elements in Group II. name …
- Question 3
A student makes crystals of the salt sodium sulfate, Na2SO4 . The student reacts 0.200 mol / dm3 dilute sulfuric acid, H2SO4(aq), with aqueous sodium hydroxide, NaOH(aq). The student uses the following steps. step 1 The student places 40.0 cm3 …
- Question 4
Gaseous sulfur tetrafluoride, SF4 , reacts with steam in a reversible reaction. SF4(g) + 2H2O(g) SO2(g) + 4HF(g) …
- Question 5
This question is about the homologous series of alcohols. (a) A homologous series is a family of organic compounds whose members have the same general formula. (i) State the general formula for alcohols. (ii) Give one other characteristic that is …
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