Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 Oct/Nov 2022 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, Oct/Nov 2022: 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: 50

Open the question paper Mark scheme

File names: 5070_w22_qp_21 · 5070_w22_ms_21

Grade thresholds for 5070/21 Oct/Nov 2022

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
50	38	25	22	17

Topics in this paper

Which syllabus chapters 5070/21 Oct/Nov 2022 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Organic chemistry	3	28
Chemistry of the environment	1	11
Electrochemistry	1	11
Acids, bases and salts	1	10
Atoms, elements and compounds	1	10
Metals	1	10
The Periodic Table	1	5

Questions in 5070/21 Oct/Nov 2022

Question 1The Periodic Table · 5 marks
The diagram shows part of the Periodic Table. Sr Ba Ag Ni Si Na I II III IV V VI VII VIII Ca Fe Zn N O Al Cl Cr K Answer the following questions using only the symbols of …
Question 2Organic chemistry · 8 marks
Carbon dioxide is a gas at room temperature. (a) (i) Draw a dot-and-cross diagram to show the arrangement of electrons in a carbon dioxide molecule. Show only the outer shell electrons. (ii) Describe the motion and separation of the particles …
Question 3Organic chemistry · 10 marks
The alkenes are a homologous series of hydrocarbons. (a) Give the general formula for the alkenes. (b) The structure of an alkene is shown. …
Question 4Chemistry of the environment · 11 marks
This question is about ammonia and ammonium salts. (a) Ammonia is manufactured by the Haber process. (i) Name the catalyst used in the Haber process. (ii) Explain how a catalyst increases the rate of reaction. (b) Ammonium phosphate, (NH4)3PO4, is …
Question 5Electrochemistry · 11 marks
This question is about metals and metal compounds. (a) Magnesium reacts with aqueous iron(II) ions. Mg + Fe2+ Mg2+ + Fe Explain why this reaction involves both oxidation and reduction. Use the equation and ideas about electron transfer in your …
Question 6Acids, bases and salts · 10 marks
This question is about compounds of nitrogen. (a) The equation represents the equilibrium between N2O4 and NO2 at a high temperature in a closed container. N2O4(g) 2NO2(g) (i) Predict what happens to the position of equilibrium when the pressure is …
Question 7Organic chemistry · 10 marks
This question is about alcohols and polymers. (a) The structure of an organic compound is shown. …
Question 8Atoms, elements and compounds · 10 marks
This question is about metals and metal compounds. (a) Brass is an alloy of copper and zinc. Brass is less malleable than either copper or zinc. Explain, with reference to the structure of metals, why brass is less malleable than …
Question 9Metals · 10 marks
(a) Zinc powder reacts with dilute hydrochloric acid. Zn + 2HCl → ZnCl …

Other Chemistry papers from Oct/Nov 2022

Questions students ask

Where can I get the 5070/21 Oct/Nov 2022 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_w22_ms_21), and on a wide screen it sits beside the question you are reading.

What was the grade threshold for an A in 5070/21 Oct/Nov 2022?

50 marks out of 75, a C needed 25.

Which topics came up in 5070/21 Oct/Nov 2022?

Mostly Organic chemistry, Chemistry of the environment, Electrochemistry. The full list is in the table above.

Do I need an account to open 5070/21 Oct/Nov 2022?

No. Every paper opens for free without signing in. A free account also saves your pen marks and records your score against the grade thresholds.