Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/22 May/June 2021 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 2, May/June 2021: the question paper and its official mark scheme, 9 questions worth 85 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 9
- Marks
- 75
- Grade A from
- 47
File names: 5070_s21_qp_22 · 5070_s21_ms_22
Grade thresholds for 5070/22 May/June 2021
The minimum raw marks Cambridge set for each grade on this component (out of 75). Thresholds change every session and variant, so always compare your score with the paper you actually sat.
| A | B | C | D | E |
|---|---|---|---|---|
| 47 | 34 | 21 | 15 | 9 |
Topics in this paper
Which syllabus chapters 5070/22 May/June 2021 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Acids, bases and salts | 4 | 40 |
| Organic chemistry | 2 | 20 |
| States of matter | 1 | 11 |
| Atoms, elements and compounds | 1 | 8 |
| Electrochemistry | 1 | 6 |
Questions in 5070/22 May/June 2021
- Question 1
Choose from the following compounds to answer the questions. …
- Question 2
Oxygen, sulfur, selenium, tellurium and polonium are in Group VI. (a) State the percentage composition by volume of oxygen in dry air. (b) State one large-scale use for oxygen. (c) Two isotopes of polonium are shown. …
- Question 3
There is concern about the disposal of plastics made from non-biodegradable polymers. (a) The partial structure of a non-biodegradable polymer is shown. CH3 …
- Question 4
Zinc bromide and zinc carbonate are both ionic compounds. (a) Predict two physical properties, other than electrical conductivity, of zinc bromide. …
- Question 5
Petroleum (crude oil) provides the raw materials for making ethanol and ammonia. (a) Describe how petroleum (crude oil) is separated to make fractions such as naphtha and petrol (gasoline). (b) Compounds such as C11H24 in the naphtha fraction are cracked …
- Question 6
Sulfur dioxide and oxides of nitrogen are pollutants found in air. (a) State one environmental problem caused by the presence of sulfur dioxide in the air. (b) Coal-fired power stations produce sulfur dioxide as a pollutant. The sulfur dioxide produced …
- Question 7
Sulfamic acid, NH2SO3H, is a white crystalline solid. It reacts with aqueous sodium nitrite to make nitrogen gas, as shown in the equation. NH2SO3H(s) + NaNO2(aq) …
- Question 8
Lead is a metal with proton number …
- Question 9
The structure of ethyl propenoate is shown. …
Other Chemistry papers from May/June 2021
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/21 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical