Cambridge IGCSE · 0620 · Paper 2 · Theory (Core)
Chemistry 0620/23 Oct/Nov 2015 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Theory (Core)), variant 3, Oct/Nov 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
- 47
File names: 0620_w15_qp_23 · 0620_w15_ms_23
Grade thresholds for 0620/23 Oct/Nov 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 |
|---|---|---|---|---|
| 47 | 40 | 34 | 26 | 19 |
Topics in this paper
Which syllabus chapters 0620/23 Oct/Nov 2015 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Organic chemistry | 2 | 20 |
| Metals | 1 | 17 |
| Acids, bases and salts | 1 | 14 |
| Chemical reactions | 1 | 10 |
| Stoichiometry | 1 | 10 |
| Experimental techniques and chemical analysis | 1 | 9 |
Questions in 0620/23 Oct/Nov 2015
- Question 1
The structures of six gases are shown below. A Ar …
- Question 2
Household waste can be burned to produce energy. The table shows the energy released by different materials when the waste is burned. material burned mass burned / kg energy released / kJ metals …
- Question 3
Hydrogen chloride can be prepared in the laboratory by heating sodium chloride with concentrated sulfuric acid using the apparatus shown below. sodium chloride concentrated sulfuric acid (a) Complete the diagram by adding the labels in the boxes. (b) The equation …
- Question 4
Ethanol can be made by fermenting glucose. yeast glucose ethanol + carbon dioxide A student investigated the fermentation of glucose at 30 °C. She used the apparatus shown below. fermentation mixture water (a) Describe how this apparatus can be used …
- Question 5
(a) Mercury is a liquid at room temperature. When heated, it changes to mercury vapour. Explain, using the kinetic particle theory, the differences in the arrangement and motion of the particles in liquid mercury and mercury vapour. (b) The table …
- Question 6
Petroleum is a mixture of hydrocarbons. Hydrocarbon fractions are separated in an oil refinery. The diagram shows the chemical plant used. X naphtha gasoline refinery gas fractions diesel lubricating fraction petroleum bitumen high low temperature (a) Name the process by …
- Question 7
(a) Chlorine is in Group VII of the Periodic Table. One isotope of a chlorine atom has a nucleon number of 35. Describe the structure of an atom of this isotope of chlorine. In your answer refer to • the …
Other Chemistry papers from Oct/Nov 2015
- 0620/11 Multiple choice (Core)
- 0620/12 Multiple choice (Core)
- 0620/13 Multiple choice (Core)
- 0620/21 Theory (Core)
- 0620/22 Theory (Core)
- 0620/31 Theory (Extended)
- 0620/32 Theory (Extended)
- 0620/33 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical