Cambridge IGCSE ยท 0620 ยท Paper 3 ยท Theory (Extended)
Chemistry 0620/32 May/June 2015 past paper
Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Extended)), variant 2, May/June 2015: 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
- 50
File names: 0620_s15_qp_32 ยท 0620_s15_ms_32
Grade thresholds for 0620/32 May/June 2015
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 |
|---|---|---|---|---|---|---|
| 50 | 41 | 32 | 26 | 19 | 13 | 7 |
Topics in this paper
Which syllabus chapters 0620/32 May/June 2015 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 2 | 28 |
| Atoms, elements and compounds | 2 | 18 |
| Organic chemistry | 1 | 17 |
| States of matter | 1 | 11 |
| Chemical reactions | 1 | 6 |
Questions in 0620/32 May/June 2015
- Question 1
Complete the following table which gives the number of protons, electrons and neutrons in each of the ๏ฌ ve particles. particle number of protons number of electrons number of neutrons โฆ
- Question 2
The table shows the melting points, boiling points and electrical properties of ๏ฌ ve substances, A to E. substance melting point / ยฐC boiling point / ยฐC electrical conductivity of solid electrical conductivity of liquid โฆ
- Question 3
Calcium reacts with nitrogen to form the ionic compound calcium nitride, Ca3N2. (a) Draw a diagram, based on the correct formula, which shows the charges on the ions and the arrangement of the electrons around the negative ion. Use o โฆ
- Question 4
Ammonia is made by the Haber process. โฆ
- Question 5
Three common methods of preparing salts are shown below. method A adding an excess of an insoluble base or carbonate or metal to a dilute acid and removing excess by ๏ฌ ltration method B using a burette and indicator method โฆ
- Question 6
The Atacama desert in Chile has deposits of the salt sodium nitrate. Very large amounts of this salt were exported to Europe for use as a fertiliser. After the introduction of the Haber process in 1913, this trade rapidly diminished. โฆ
- Question 7
Alcohols can be made by fermentation or from petroleum. (a) Ethanol can be made by the fermentation of glucose. yeast C6H12O6(aq) 2C2H5OH(aq) + 2CO2(g) exothermic reaction Yeast are living single-cell fungi which ferment glucose by anaerobic respiration. This reaction is โฆ
Other Chemistry papers from May/June 2015
- 0620/11 Multiple choice (Core)
- 0620/12 Multiple choice (Core)
- 0620/13 Multiple choice (Core)
- 0620/21 Theory (Core)
- 0620/22 Theory (Core)
- 0620/23 Theory (Core)
- 0620/31 Theory (Extended)
- 0620/33 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical