Cambridge IGCSE ยท 0620 ยท Paper 3 ยท Theory (Extended)
Chemistry 0620/33 Oct/Nov 2014 past paper
Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Extended)), variant 3, Oct/Nov 2014: 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
- 43
File names: 0620_w14_qp_33 ยท 0620_w14_ms_33
Grade thresholds for 0620/33 Oct/Nov 2014
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 |
|---|---|---|---|---|
| 43 | 33 | 24 | 22 | 18 |
Topics in this paper
Which syllabus chapters 0620/33 Oct/Nov 2014 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 2 | 24 |
| Stoichiometry | 2 | 19 |
| Organic chemistry | 1 | 14 |
| Atoms, elements and compounds | 1 | 10 |
| Electrochemistry | 1 | 7 |
| Metals | 1 | 6 |
Questions in 0620/33 Oct/Nov 2014
- Question 1
For each of the following elements give one physical property and one chemical property. (a) bromine (Br2) physical property chemical property (b) carbongraphite(C) physical property chemical property (c) manganese (Mn) physical property chemical property
- Question 2
Compound X is a colourless liquid at room temperature. (a) A sample of pure X was slowly heated from โ5.0 ยฐC, which is below its melting point, to 90 ยฐC, which is above its boiling point. Its temperature is measured โฆ
- Question 3
In 1985 the fullerenes were discovered. They are solid forms of the element carbon. The structure of the C60 fullerene is given below. (a) (i) In the C60 fullerene, how many other carbon atoms is each carbon atom bonded to? โฆ
- Question 4
A fuel cell produces electrical energy by the oxidation of a fuel by oxygen. The fuel is usually hydrogen but methane and methanol are two other fuels which may be used. A diagram of a hydrogen fuel cell is given โฆ
- Question 5
(a) Sodium chlorate(I) decomposes to form sodium chloride and oxygen. The rate of this reaction is very slow at room temperature provided the sodium chlorate(I) is stored in a dark bottle to prevent exposure to light. 2NaCl O โ 2NaCl โฆ
- Question 6
Rubidium and strontium are very reactive metals at the top of the reactivity series. Because their ions have different charges, their compounds behave differently when heated. (a) The formulae of the ions of these two elements are Rb+ and Sr2+. โฆ
- Question 7
Butane is oxidised to a mixture of carboxylic acids by oxygen in the presence of a catalyst. The acids formed are methanoic acid, ethanoic acid and propanoic acid โ the ๏ฌ rst three members of the carboxylic acid homologous series. โฆ
- Question 8
(a) Describe how cobalt chloride paper can be used to test for the presence of water. (b) Complete the description of the preparation of crystals of the soluble salt, cobalt(II) chloride-6-water, CoCl 2.6H2O, from the insoluble base, cobalt(II) carbonate. CoCO3(s) โฆ
Other Chemistry papers from Oct/Nov 2014
- 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)
- 0620/32 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical