Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 Feb/March 2023 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Feb/March 2023: 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
- 53
File names: 0620_m23_qp_42 · 0620_m23_ms_42
Grade thresholds for 0620/42 Feb/March 2023
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 |
|---|---|---|---|---|---|---|
| 53 | 42 | 31 | 25 | 19 | 13 | 8 |
Topics in this paper
Which syllabus chapters 0620/42 Feb/March 2023 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Chemical reactions | 1 | 18 |
| The Periodic Table | 1 | 18 |
| Organic chemistry | 1 | 17 |
| Atoms, elements and compounds | 1 | 16 |
| Chemistry of the environment | 1 | 11 |
Questions in 0620/42 Feb/March 2023
- Question 1
This question is about gases found in clean, dry air and gases found in polluted air. (a) Name one gas found in clean, dry air which contributes to global warming. (b) State the percentage of nitrogen in clean, dry air. …
- Question 2
Lithium, sodium and potassium are Group I elements. (a) Name the type of bonding in these elements. (b) Sodium reacts with cold water to form hydrogen gas and a solution of a strong alkali. (i) State the test for hydrogen …
- Question 3
The Haber process is used to manufacture ammonia. (a) State the main source of each gas used in the Haber process. nitrogen hydrogen (b) The equation for the Haber process is shown. …
- Question 4
Copper is element 29 in the Periodic Table. (a) Brass contains copper. (i) Name the other metal in brass. (ii) State the term given to a mixture of a metal with another element. (b) Copper can be stretched into wires. …
- Question 5
Propane, propene, propan-1-ol and propanoic acid are members of different homologous series. Molecules of these substances contain three carbon atoms. (a) Explain why members of a homologous series have similar chemical properties. (b) Name the homologous series to which propanoic …
Other Chemistry papers from Feb/March 2023
- 0620/12 Multiple choice (Core)
- 0620/22 Multiple choice (Extended)
- 0620/32 Theory (Core)
- 0620/62 Alternative to Practical