Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/43 May/June 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 3, May/June 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
- 57
File names: 0620_s25_qp_43 · 0620_s25_ms_43
Grade thresholds for 0620/43 May/June 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 |
|---|---|---|---|---|---|---|
| 57 | 44 | 32 | 26 | 21 | 16 | 11 |
Topics in this paper
Which syllabus chapters 0620/43 May/June 2025 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Organic chemistry | 2 | 28 |
| Chemical reactions | 1 | 15 |
| The Periodic Table | 1 | 15 |
| Chemistry of the environment | 1 | 13 |
| Atoms, elements and compounds | 1 | 9 |
Questions in 0620/43 May/June 2025
- Question 1
A list of substances is shown. aluminium oxide calcium oxide chlorine ethanol graphite nitrogen oxygen propane propene silicon(IV) oxide Answer the questions using the list of substances. Each substance may be used once, more than once, or not at all. …
- Question 2
Atoms are made of electrons, neutrons and protons. (a) State which of these particles are found in the nucleus of an atom. (b) Atoms of the same element are known as isotopes. 32 16S and 34 16S are isotopes of …
- Question 3
This question is about zinc and compounds of zinc. (a) Zinc is held together by electrostatic forces of attraction between particles. (i) Name the type of bonding in zinc. (ii) Name the two types of particles held together by the …
- Question 4
This question is about compounds of sulfur. (a) Sulfuric acid is manufactured in a four‑stage process. stage 1 Sulfur dioxide is produced from ores containing sulfur. stage 2 Sulfur dioxide reacts with oxygen to form sulfur trioxide. stage 3 Sulfur …
- Question 5
Ethanoic acid is manufactured in the reaction between methanol and carbon monoxide. An equilibrium mixture is produced. CH3OH(g) + CO(g) CH3COOH(g) (a) State two characteristics of an equilibrium. …
- Question 6
This question is about the Periodic Table. (a) State the name given to Group I elements. (b) State which Group I element is least reactive. (c) Lithium is in Group I of the Periodic Table. When lithium is added to …
Other Chemistry papers from May/June 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)
- 0620/42 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical