Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/41 May/June 2021 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 1, May/June 2021: 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
- 42
File names: 0620_s21_qp_41 · 0620_s21_ms_41
Grade thresholds for 0620/41 May/June 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 | F | G |
|---|---|---|---|---|---|---|
| 42 | 30 | 19 | 15 | 11 | 8 | 5 |
Topics in this paper
Which syllabus chapters 0620/41 May/June 2021 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Electrochemistry | 2 | 25 |
| Acids, bases and salts | 1 | 15 |
| Stoichiometry | 1 | 15 |
| Metals | 1 | 13 |
| Chemical reactions | 1 | 7 |
| Atoms, elements and compounds | 1 | 5 |
Questions in 0620/41 May/June 2021
- Question 1
Give the name of the process that is used: (a) to produce ammonia from nitrogen (b) to separate nitrogen from liquid air (c) to produce bromine from molten lead(II) bromide (d) to separate an undissolved solid from an aqueous solution …
- Question 2
Complete the table to: ● deduce the number of protons, electrons and neutrons in the magnesium atom and copper ion shown ● identify the atom or ion represented by the final row. number of protons number of electrons number of …
- Question 3
Potassium reacts with chlorine to form potassium chloride, KCl. (a) Write a chemical equation for this reaction. (b) Potassium chloride is an ionic compound. Complete the diagram to show the electron arrangement in the outer shells of the ions present …
- Question 4
Dinitrogen tetroxide, N2O4, decomposes into nitrogen dioxide, NO2. The reaction is reversible. N2O4(g) 2NO2(g) colourless gas brown gas A gas syringe containing a mixture of dinitrogen tetroxide and nitrogen dioxide gases was sealed and heated. After reaching equilibrium the mixture …
- Question 5
This question is about salts. (a) Salts that are insoluble in water are made by precipitation. ● Lead(II) iodide, PbI2, is insoluble in water. ● All nitrates are soluble in water. ● All sodium salts are soluble in water. You …
- Question 6
This question is about iron. (a) Iron is extracted from its main ore in a blast furnace. waste gases raw materials: coke, iron ore, limestone molten iron …
- Question 7
Many organic compounds contain carbon, hydrogen and oxygen only. (a) An organic compound V has the following composition by mass. …
Other Chemistry papers from May/June 2021
- 0620/11 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)
- 0620/33 Theory (Core)
- 0620/42 Theory (Extended)
- 0620/43 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical