Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 May/June 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, May/June 2020: the question paper and its official mark scheme, 6 questions worth 80 marks. Free to open, no account needed.
- Questions
- 6
- Marks
- 80
File names: 0620_s20_qp_42 · 0620_s20_ms_42
Topics in this paper
Which syllabus chapters 0620/42 May/June 2020 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Chemistry of the environment | 1 | 16 |
| Chemical reactions | 1 | 16 |
| Organic chemistry | 1 | 16 |
| Experimental techniques and chemical analysis | 1 | 13 |
| The Periodic Table | 1 | 11 |
| Electrochemistry | 1 | 8 |
Questions in 0620/42 May/June 2020
- Question 1
(a) Give the name of the process that: (i) occurs when a gas turns into a liquid (ii) occurs when a solid turns into a gas without first forming a liquid (iii) is used to separate a mixture of liquids …
- Question 2
Fluorine forms both ionic and covalent compounds. (a) Magnesium reacts with fluorine to form the ionic compound magnesium fluoride. The electronic structures of an atom of magnesium and an atom of fluorine are shown. Mg F (i) Complete the dot-and-cross …
- Question 3
(a) Sulfuric acid is made from sulfur in a four-stage process. stage 1 Sulfur is converted into sulfur dioxide. stage 2 Sulfur dioxide is converted into sulfur trioxide. stage 3 Sulfur trioxide is converted into oleum. stage 4 Oleum is …
- Question 4
Oxygen is produced by the decomposition of hydrogen peroxide. Manganese(IV) oxide is the catalyst for this reaction. (a) What is meant by the term catalyst …
- Question 5
Electrolysis of concentrated aqueous sodium chloride using inert electrodes forms chlorine, hydrogen and sodium hydroxide. (a) What is meant by the term electrolysis? (b) Name a substance that can be used as the inert electrodes. (c) Write an ionic half-equation …
- Question 6
(a) Propane reacts with chlorine in a photochemical reaction as shown. C3H8 + Cl 2 → C3H7Cl + HCl (i) What type of reaction is this? (ii) What condition is needed for this photochemical reaction to occur? (iii) Draw two …
Other Chemistry papers from May/June 2020
- 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)
- 0620/43 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical