Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 Oct/Nov 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Oct/Nov 2020: 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
- 40
File names: 0620_w20_qp_42 · 0620_w20_ms_42
Grade thresholds for 0620/42 Oct/Nov 2020
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 |
|---|---|---|---|---|---|---|
| 40 | 30 | 19 | 16 | 12 | 8 | 4 |
Topics in this paper
Which syllabus chapters 0620/42 Oct/Nov 2020 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Organic chemistry | 2 | 32 |
| Acids, bases and salts | 1 | 26 |
| The Periodic Table | 2 | 22 |
Questions in 0620/42 Oct/Nov 2020
- Question 1
The electronic structures of some atoms and ions are shown. …
- Question 2
Soluble salts can be made by adding a metal carbonate to a dilute acid. (a) Give the formula of the dilute acid which reacts with a metal carbonate to form a nitrate salt. (b) A student wanted to make hydrated …
- Question 3
Group I metals are very reactive. Transition elements are also metals but are less reactive than Group I metals. (a) State two physical properties of Group I metals which are similar to those of transition metals. …
- Question 4
Alkenes and alkanes are homologous series of compounds containing carbon and hydrogen atoms. (a) State the name of the type of compound made from carbon and hydrogen atoms only. (b) Alkenes take part in addition reactions. (i) Describe what is …
- Question 5
This question is about alcohols, carboxylic acids and esters. (a) Ethanol will react with hot aqueous potassium manganate(VII) to form ethanoic acid. (i) State the other condition needed for this reaction to take place. (ii) State the type of chemical …
Other Chemistry papers from Oct/Nov 2020
- 0620/11 Multiple choice (Core)
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- 0620/21 Multiple choice (Extended)
- 0620/22 Multiple choice (Extended)
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- 0620/31 Theory (Core)
- 0620/32 Theory (Core)
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- 0620/41 Theory (Extended)
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- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical