Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 Oct/Nov 2019 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Oct/Nov 2019: 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
- 51
File names: 0620_w19_qp_42 · 0620_w19_ms_42
Grade thresholds for 0620/42 Oct/Nov 2019
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 |
|---|---|---|---|---|---|---|
| 51 | 39 | 27 | 22 | 18 | 14 | 10 |
Topics in this paper
Which syllabus chapters 0620/42 Oct/Nov 2019 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 1 | 22 |
| Chemistry of the environment | 1 | 18 |
| Electrochemistry | 1 | 16 |
| Atoms, elements and compounds | 1 | 12 |
| Organic chemistry | 1 | 12 |
Questions in 0620/42 Oct/Nov 2019
- Question 1
The Periodic Table is very useful to chemists. Refer only to elements with atomic numbers 1 to 36 in the Periodic Table provided when answering Question 1. (a) Use information from the Periodic Table provided to identify one element which: …
- Question 2
The gases Ar, CO2, N2 and O2 are in clean, dry air. CO, NO, NO2 and SO2 are gases commonly found in polluted air. (a) What percentage of clean, dry air is N2? Give your answer to the nearest whole …
- Question 3
Ammonia is an important chemical. (a) Ammonia is manufactured by the Haber process. The reaction is reversible. (i) What is the sign for a reversible reaction? (ii) State the essential conditions for the manufacture of ammonia by the Haber process …
- Question 4
Many substances conduct electricity. (a) Identify all the particles responsible for the passage of electricity in: ● graphite ● magnesium ribbon ● molten copper(II) bromide. …
- Question 5
Methanol, CH3OH, is a member of the homologous series of alcohols. (a) Methanol can be made from methane in a two-step process. step 1 Methane is reacted with chlorine gas to produce chloromethane, CH3Cl. step 2 CH3Cl is reacted with …
Other Chemistry papers from Oct/Nov 2019
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- 0620/61 Alternative to Practical
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