Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 May/June 2018 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, May/June 2018: 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
- 51
File names: 0620_s18_qp_42 · 0620_s18_ms_42
Grade thresholds for 0620/42 May/June 2018
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 |
|---|---|---|---|---|---|---|
| 51 | 39 | 26 | 22 | 17 | 12 | 7 |
Topics in this paper
Which syllabus chapters 0620/42 May/June 2018 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Electrochemistry | 2 | 28 |
| Organic chemistry | 1 | 20 |
| Acids, bases and salts | 1 | 12 |
| The Periodic Table | 1 | 7 |
| Chemical reactions | 1 | 7 |
| Atoms, elements and compounds | 1 | 6 |
Questions in 0620/42 May/June 2018
- Question 1
Give the name of the process that is used: (a) to obtain water from aqueous sodium chloride (b) to produce lead from molten lead(II) bromide (c) to separate an insoluble solid from a liquid (d) to separate the components of …
- Question 2
This question is about the elements in Period 3 of the Periodic Table. Na Mg Al Si P S Cl Ar For each of the following, identify a Period 3 element which matches the description. Each element may be used …
- Question 3
Complete the following table. particle number of protons number of electrons number of neutrons number of nucleons 11Na …
- Question 4
Potassium reacts with bromine at room temperature to form potassium bromide. (a) Write a chemical equation for this reaction. Include state symbols. (b) Potassium bromide exists as an ionic lattice. Potassium bromide does not conduct electricity when solid but does …
- Question 5
Hydrogen and iodine react together in a reversible reaction. Hydrogen iodide is formed. …
- Question 6
(a) All sodium salts are soluble in water. All nitrates are soluble in water. Barium carbonate is insoluble in water. Describe how you would make a pure, dry sample of barium carbonate by precipitation. Include: ● ● the names of …
- Question 7
Many organic compounds, such as alcohols, carboxylic acids and esters, contain the elements carbon, hydrogen and oxygen only. (a) Compound R has the following composition by mass: …
Other Chemistry papers from May/June 2018
- 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)
- 0620/33 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