Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 Feb/March 2017 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Feb/March 2017: 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
- 49
File names: 0620_m17_qp_42 · 0620_m17_ms_42
Grade thresholds for 0620/42 Feb/March 2017
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 |
|---|---|---|---|---|---|---|
| 49 | 40 | 30 | 25 | 19 | 14 | 9 |
Topics in this paper
Which syllabus chapters 0620/42 Feb/March 2017 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 2 | 23 |
| Chemical reactions | 1 | 13 |
| Metals | 1 | 12 |
| Stoichiometry | 1 | 12 |
| Organic chemistry | 1 | 11 |
| Electrochemistry | 1 | 9 |
Questions in 0620/42 Feb/March 2017
- Question 1
(a) Five organic compounds have the following structures. …
- Question 2
Silver dichromate, Ag2Cr2O7, is a red insoluble salt. Silver dichromate can be made by reacting silver nitrate solution with ammonium dichromate solution. The chemical equation for the reaction is shown. 2AgNO3(aq) + (NH4)2Cr2O7(aq) 2NH4NO3(aq) + Ag2Cr2O7(s) (a) Describe how you …
- Question 3
Nitryl chloride, NO2Cl, reacts with nitric oxide, NO. The forward reaction is exothermic. NO2Cl (g) + NO(g) NO2(g) + NOCl (g) The reaction can reach equilibrium. (a) What is meant by the term equilibrium for a reversible reaction? (b) Explain …
- Question 4
Copper(II) sulfate solution was electrolysed using the apparatus shown. + – carbon cathode carbon anode copper(II) sulfate solution (a) (i) Draw an arrow on the diagram to show the direction of movement of electrons in the wire. Label the arrow …
- Question 5
Iron is extracted from its ore using a blast furnace. (a) In the blast furnace, coke burns in oxygen to produce heat energy and carbon dioxide. How is this carbon dioxide converted into carbon monoxide in the blast furnace? (b) …
- Question 6
Barium carbonate decomposes when heated. BaCO3(s) BaO(s) + CO2(g) (a) A student heated …
- Question 7
(a) The diagram shows part of the structure of an addition polymer. …
Other Chemistry papers from Feb/March 2017
- 0620/12 Multiple choice (Core)
- 0620/22 Multiple choice (Extended)
- 0620/32 Theory (Core)
- 0620/62 Alternative to Practical