Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/21 May/June 2024 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2024: the question paper and its official mark scheme, 9 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 9
- Marks
- 80
- Grade A from
- 53
File names: 5070_s24_qp_21 · 5070_s24_ms_21
Grade thresholds for 5070/21 May/June 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 |
|---|---|---|---|---|
| 53 | 37 | 22 | 17 | 13 |
Topics in this paper
Which syllabus chapters 5070/21 May/June 2024 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 2 | 16 |
| Chemistry of the environment | 2 | 16 |
| Chemical energetics | 1 | 13 |
| Electrochemistry | 1 | 9 |
| States of matter | 1 | 9 |
| Organic chemistry | 1 | 9 |
| Stoichiometry | 1 | 8 |
Questions in 5070/21 May/June 2024
- Question 1
Choose from the following substances to answer the questions. carbon chlorine glucose hydrated copper(II) sulfate iron magnesium sulfate methanoic acid methanol nickel silicon(IV) oxide vanadium(V) oxide Each substance can be used once, more than once or not at all. State …
- Question 2
Calcium carbide, CaC2, reacts with water to form a flammable gas ethyne, C2H2, and calcium hydroxide. (a) Construct the symbol equation for this reaction. (b) Calcium carbide is ionic. Deduce the formula of the carbide ion. (c) Fig. 2.1 shows …
- Question 3
Aqueous ammonium nitrite decomposes when heated to form nitrogen. NH4NO2(aq) …
- Question 4
Potassium iodide, KI, is an ionic solid composed of a lattice of potassium ions and iodide ions. (a) Explain why potassium iodide has a high melting point. (b) Describe how potassium atoms and iodine molecules react to form potassium ions …
- Question 5
When a sample of zinc sulfite is heated in a closed system, an equilibrium mixture is formed. ZnSO3(s) ZnO(s) + SO2(g) The forward reaction is endothermic. (a) The temperature of the closed system is increased and the pressure is kept …
- Question 6
Carbon dioxide is a greenhouse gas that is linked to increased global warming. (a) Describe one adverse effect of increased global warming. (b) Describe how carbon dioxide causes global warming. (c) Photosynthesis removes carbon dioxide from the atmosphere. (i) Write …
- Question 7
Chlorine is a gas at room temperature. Iodine is a solid at room temperature. (a) A sample of chlorine has a volume of 240 cm3 at room temperature and pressure. The pressure of the sample is increased at room temperature. …
- Question 8
Fig. 8.1 is a flow diagram showing information about some organic chemical reactions. …
- Question 9
Polymers are made by either an addition reaction or a condensation reaction. (a) Describe the differences between addition and condensation polymerisation. (b) PET is a condensation polymer. Name the type of linkage that bonds the repeat units to one another …
Other Chemistry papers from May/June 2024
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical