Cambridge IGCSE · 0620 · Paper 3 · Theory (Extended)
Chemistry 0620/31 May/June 2015 past paper
Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Extended)), variant 1, May/June 2015: the question paper and its official mark scheme, 6 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 6
- Marks
- 80
- Grade A from
- 36
File names: 0620_s15_qp_31 · 0620_s15_ms_31
Grade thresholds for 0620/31 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 |
|---|---|---|---|---|---|---|
| 36 | 28 | 19 | 14 | 10 | 7 | 4 |
Topics in this paper
Which syllabus chapters 0620/31 May/June 2015 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Chemical reactions | 2 | 29 |
| Acids, bases and salts | 1 | 14 |
| Organic chemistry | 1 | 13 |
| Chemistry of the environment | 1 | 12 |
| Metals | 1 | 12 |
Questions in 0620/31 May/June 2015
- Question 1
(a) Coal is a solid fossil fuel. Name two other fossil fuels. (b) Two of the elements present in a sample of coal are carbon and sulfur. A sample of coal was heated in the absence of air and the …
- Question 2
Iron from the Blast Furnace is impure. It contains about 5% of impurities, mainly carbon, sulfur, silicon and phosphorus, which have to be removed when this iron is converted into steel. (a) Explain how the addition of oxygen and calcium …
- Question 3
(a) The reactions between metals and acids are redox reactions. Zn …
- Question 4
The alcohols form a homologous series. (a) (i) Give three characteristics which all members of a homologous series share. (ii) Give the name of the third member of this series. name (iii) Deduce the molecular formula of the alcohol whose …
- Question 5
The halogens are a group of non-metals in Group VII of the Periodic Table. (a) The reactivity of the halogens decreases down the group. Describe an experiment which shows that chlorine is more reactive than iodine. Include an equation in …
- Question 6
Acid-base reactions are examples of proton transfer. (a) Ethylamine is a weak base and sodium hydroxide is a strong base. (i) In terms of proton transfer, explain what is meant by the term weak base. (ii) Given aqueous solutions of …
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)
- 0620/32 Theory (Extended)
- 0620/33 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical