Cambridge IGCSE · 0620 · Paper 3 · Theory (Core)
Chemistry 0620/33 Oct/Nov 2021 past paper
Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Core)), variant 3, Oct/Nov 2021: the question paper and its official mark scheme, 8 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 8
- Marks
- 80
- Grade A from
- 44
File names: 0620_w21_qp_33 · 0620_w21_ms_33
Grade thresholds for 0620/33 Oct/Nov 2021
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 |
|---|---|---|---|---|
| 44 | 38 | 32 | 25 | 18 |
Topics in this paper
Which syllabus chapters 0620/33 Oct/Nov 2021 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Metals | 2 | 28 |
| Organic chemistry | 1 | 10 |
| Stoichiometry | 1 | 9 |
| States of matter | 1 | 9 |
| Atoms, elements and compounds | 1 | 8 |
| Electrochemistry | 1 | 8 |
| Chemical reactions | 1 | 8 |
Questions in 0620/33 Oct/Nov 2021
- Question 1
(a) A list of formulae is shown. Br2 CO CO2 CH4 C2H6 HCl KBr LiCl MgCl 2 O2 SO2 Answer the following questions using these formulae. Each formula may be used once, more than once or not at all. State …
- Question 2
The table shows the masses of some of the ions in 1000 cm3 of water from a river. name of ion formula of ion mass of ion in 1000 cm3 of river water / mg ammonium NH4 + 1.0 Ca2+ …
- Question 3
Iron is extracted in a blast furnace using a mixture of iron ore, coke (carbon), air and calcium carbonate (limestone). (a) Give two reasons why air is blown into the blast furnace. …
- Question 4
The table shows some properties of four halogens in Group VII. halogen melting point / °C boiling point / °C density of liquid at boiling point in g / cm3 chlorine …
- Question 5
The table shows the structures of some organic compounds. compound structure of compound homologous series …
- Question 6
The diagram shows part of the structures of sodium chloride and pentane at room temperature and pressure. represents pentane, CH3CH2CH2CH2CH3 Na+ Cl – Na+ Cl – Na+ Cl – Na+ Cl – Cl – Na+ Na+ Cl – (a) Describe …
- Question 7
This question is about aluminium and the extraction of metals. (a) When aluminium is heated above 660 °C it changes from solid to liquid. (i) Name the change of state from solid to liquid. (ii) Use the kinetic particle theory …
- Question 8
A student investigated the reaction of small pieces of zinc with dilute hydrochloric acid. The hydrochloric acid was in excess. Zn + 2HCl → ZnCl …
Other Chemistry papers from Oct/Nov 2021
- 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)
- 0620/41 Theory (Extended)
- 0620/42 Theory (Extended)
- 0620/43 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical