Cambridge IGCSE ยท 0620 ยท Paper 3 ยท Theory (Extended)
Chemistry 0620/32 May/June 2012 past paper
Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Extended)), variant 2, May/June 2012: the question paper and its official mark scheme, 8 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 8
- Marks
- 80
- Grade A from
- 33
File names: 0620_s12_qp_32 ยท 0620_s12_ms_32
Grade thresholds for 0620/32 May/June 2012
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 |
|---|---|---|---|---|
| 33 | 0 | 19 | 0 | 9 |
Topics in this paper
Which syllabus chapters 0620/32 May/June 2012 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 3 | 32 |
| Atoms, elements and compounds | 2 | 13 |
| Organic chemistry | 1 | 13 |
| Chemistry of the environment | 1 | 12 |
| Metals | 1 | 10 |
Questions in 0620/32 May/June 2012
- Question 1
For Examinerโs Use 1 The table below includes information about some of the elements in Period 2. element carbon nitrogen ๏ฌ uorine neon symbol โฆ
- Question 2
For Examinerโs Use 2 Diamond and graphite are different forms of the same element, carbon. Explain the following in terms of their structure. (a) Graphite is a soft material which is used as a lubricant. (b) Diamond is a very โฆ
- Question 3
The uses of a substance are determined by its properties. (a) Plastics are poor conductors of electricity. They are used as insulation for electric cables. Which other two properties of plastics make them suitable for this purpose? (b) Chromium is โฆ
- Question 4
The ore of aluminium is bauxite which is impure aluminium oxide. Alumina, pure aluminium oxide, is obtained from bauxite. Aluminium is formed at the cathode when a molten mixture of alumina and cryolite, Na3Al F6, is electrolysed. (a) (i) Name โฆ
- Question 5
Islay is an island off the west coast of Scotland. The main industry on the island is making ethanol from barley. Barley contains the complex carbohydrate, starch. Enzymes catalyse the hydrolysis of starch to a solution of glucose. (a) (i) โฆ
- Question 6
For Examinerโs Use 6 A length of magnesium ribbon was added to 50 cm3 of sulfuric acid, concentration 1.0 mol / dm3. The time taken for the magnesium to react was measured. The experiment was repeated with the same volume โฆ
- Question 7
For Examinerโs Use 7 The alkenes are unsaturated hydrocarbons. They form a homologous series, the members of which have similar chemical properties: โ easily oxidised โ addition reactions โ polymerisation โ combustion. (a) All the alkenes have the same empirical โฆ
- Question 8
Ethylamine, CH3โCH2โNH2, is a base which has similar properties to ammonia. (a) In aqueous ethylamine, there is the following equilibrium. CH3โCH2โNH2 + H2O CH3โCH2โNH3 + + OHโ Explain why water is behaving as an acid in this reaction. (b) Given โฆ
Other Chemistry papers from May/June 2012
- 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