Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/43 Oct/Nov 2024 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 3, Oct/Nov 2024: 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
- 49
File names: 0620_w24_qp_43 · 0620_w24_ms_43
Grade thresholds for 0620/43 Oct/Nov 2024
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 |
|---|---|---|---|---|---|---|
| 49 | 38 | 27 | 23 | 18 | 14 | 10 |
Topics in this paper
Which syllabus chapters 0620/43 Oct/Nov 2024 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Metals | 2 | 25 |
| Acids, bases and salts | 1 | 20 |
| Chemical reactions | 1 | 15 |
| Electrochemistry | 1 | 11 |
| Stoichiometry | 1 | 9 |
Questions in 0620/43 Oct/Nov 2024
- Question 1
A list of substances is shown. bauxite carbon dioxide cryolite ethane ethanol ethene graphite helium hematite hydrogen silicon(IV) oxide sodium chloride Answer the following questions using only the substances from the list. Each substance may be used once, more than …
- Question 2
This question is about electrolysis. (a) State the meaning of the term electrolysis. (b) Table 2.1 gives some information about the electrolysis of two electrolytes using graphite electrodes. Table 2.1 anode (positive electrode) cathode (negative electrode) electrolyte observation name of …
- Question 3
This question is about compounds of tin. (a) Tin(IV) oxide has the formula SnO2. The relative formula mass, Mr, of SnO2 is 151. Calculate the percentage by mass of tin in SnO2. percentage by mass of tin in SnO2 …
- Question 4
This question is about sulfuric acid, H2SO4. (a) Dilute sulfuric acid and aqueous sodium hydroxide can be used to prepare sodium sulfate crystals using a method that involves titration. The apparatus for titration is shown in Fig. 4.1. 25.0 cm3 …
- Question 5
This question is about rate of reaction and equilibrium. A student investigates the rate of decomposition of aqueous hydrogen peroxide, H2O2, using manganese(IV) oxide as a catalyst. The equation for the reaction is shown. 2H2O2(aq) …
- Question 6
This question is about hydrocarbons. (a) State the meaning of the term hydrocarbon. (b) Propene, C3H6, can be made from long-chain alkanes such as dodecane. Dodecane contains 12 carbon atoms. (i) Deduce the molecular formula of dodecane. (ii) Name the …
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