Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/41 Oct/Nov 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 1, Oct/Nov 2020: the question paper and its official mark scheme, 7 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 7
- Marks
- 80
- Grade A from
- 46
File names: 0620_w20_qp_41 · 0620_w20_ms_41
Grade thresholds for 0620/41 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 |
|---|---|---|---|---|---|---|
| 46 | 36 | 25 | 20 | 16 | 11 | 6 |
Topics in this paper
Which syllabus chapters 0620/41 Oct/Nov 2020 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Chemistry of the environment | 2 | 23 |
| Metals | 2 | 18 |
| Organic chemistry | 1 | 16 |
| Electrochemistry | 1 | 15 |
| Experimental techniques and chemical analysis | 1 | 8 |
Questions in 0620/41 Oct/Nov 2020
- Question 1
(a) This question is about elements. aluminium carbon iron hydrogen oxygen silicon sodium sulfur Answer the following questions about these elements. Each element may be used once, more than once or not at all. (i) Name the element that can …
- Question 2
Zinc is extracted from an ore containing zinc sulfide. (a) State the name of this zinc ore. (b) This ore is converted to zinc oxide, ZnO. Zinc oxide is then reacted with carbon. (i) Write a chemical equation for the …
- Question 3
(a) Aqueous ammonium sulfate, (NH4)2SO4, is warmed with aqueous sodium hydroxide. The pungent-smelling gas ammonia, NH3, is produced. Balance the equation for this reaction. (NH4)2SO4 + NaOH → NH3 …
- Question 4
Air is a mixture of gases. (a) State the percentage of clean dry air which is oxygen. Give your answer to the nearest whole number. …
- Question 5
(a) Dilute sulfuric acid is electrolysed using the apparatus shown in the diagram. power supply inert electrodes dilute sulfuric acid …
- Question 6
(a) Ethane, propane and butane are members of the same homologous series. (i) Name this homologous series. (ii) State two ways members of the same homologous series are similar. …
- Question 7
(a) Ethanol can be manufactured by two different methods. Method 1: fermentation of a sugar, …
Other Chemistry papers from Oct/Nov 2020
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