Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/22 May/June 2023 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 2, May/June 2023: the question paper and its official mark scheme, 10 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 10
- Marks
- 80
- Grade A from
- 52
File names: 5070_s23_qp_22 · 5070_s23_ms_22
Grade thresholds for 5070/22 May/June 2023
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 |
|---|---|---|---|---|
| 52 | 37 | 22 | 18 | 14 |
Topics in this paper
Which syllabus chapters 5070/22 May/June 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/22 May/June 2023
- Question 1
Choose from the following oxides to answer the questions. CO CO2 CaO CuO Fe2O3 H2O SO2 SiO2 ZnO Each oxide may be used once, more than once or not at all. State which oxide: (a) is neutral (b) reacts with …
- Question 2
Group VII includes the elements fluorine, chlorine, bromine and iodine. (a) Chlorine is a green gas at room temperature and pressure. State the appearance of iodine at room temperature and pressure. (b) Chlorine reacts with aqueous potassium iodide in a …
- Question 3
This question is about the preparation of salts. (a) Zinc nitrate is a soluble salt. It is prepared by the reaction of an insoluble carbonate with a dilute acid. The equation for this reaction is shown. ZnCO3(s) + 2HNO3(aq) Zn(NO3)2(aq) …
- Question 4
This question is about compounds that contain magnesium and nitrogen. (a) The formula for a nitride ion can be written as 15 7N3–. Complete Table 4.1 to show the number of particles in this nitride ion. Table 4.1 particle number …
- Question 5
Carbon reacts with steam to make carbon monoxide and hydrogen. This reaction is reversible. The forward reaction absorbs thermal energy. …
- Question 6
This question is about the energy changes that take place during chemical reactions. (a) Nitrogen reacts with oxygen to make nitrogen monoxide. The reaction is endothermic. …
- Question 7
Ethene, but-1-ene and but-2-ene are alkenes. The displayed formulae of ethene and but-1-ene are shown in Fig. …
- Question 8
This question is about electrolysis. (a) The table shows some information about the electrolysis of three different electrolytes using graphite electrodes. Complete Table 8.1 with the names of the products at each electrode. Table 8.1 electrolyte product at anode product …
- Question 9
A sample of clean, dry air contains 0.0400% carbon dioxide by volume. (a) Calculate the number of molecules of carbon dioxide in 480 dm3 of clean, dry air at room temperature and pressure. One mole of any gas contains …
- Question 10
Proteins and PET are polymers made by a reaction called condensation polymerisation. (a) The diagram in Fig. 10.1 shows the structure of a section of a protein. …
Other Chemistry papers from May/June 2023
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/21 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical