Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 Oct/Nov 2023 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, Oct/Nov 2023: 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: 54

Open the question paper Mark scheme

File names: 5070_w23_qp_21 · 5070_w23_ms_21

Grade thresholds for 5070/21 Oct/Nov 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
54	40	25	20	15

Topics in this paper

Which syllabus chapters 5070/21 Oct/Nov 2023 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Chemistry of the environment	2	16
Chemical reactions	2	15
Atoms, elements and compounds	1	13
Electrochemistry	1	10
Organic chemistry	1	10
Stoichiometry	1	9
Chemical energetics	1	7

Questions in 5070/21 Oct/Nov 2023

Question 1Chemistry of the environment · 5 marks
Choose from the list of compounds to answer these questions. calcium oxide carbon dioxide carbon monoxide lead chloride propan‑1‑ol sodium nitrate sodium sulfate sulfur dioxide water Each compound may be used once, more than once or not at all. Identify …
Question 2Atoms, elements and compounds · 13 marks
This question is about metals. (a) Potassium is an element in Group I of the Periodic Table. Copper is a transition element. State two physical properties of potassium that are different from those of copper. …
Question 3Chemical reactions · 8 marks
A student investigates the reaction of small pieces of zinc with dilute hydrochloric acid at 25 °C. The dilute hydrochloric acid is in excess. (a) Complete the equation for this reaction by adding state symbols. Zn( ) + 2HCl ( …
Question 4Electrochemistry · 10 marks
(a) Concentrated aqueous calcium bromide is electrolysed using graphite electrodes. Predict the product at each electrode. anode cathode (b) Molten calcium bromide is electrolysed using graphite electrodes. Construct the ionic half‑equation for the reaction at each electrode when molten calcium …
Question 5Organic chemistry · 10 marks
(a) Fig. 5.1 shows the displayed formula of compound …
Question 6Chemical energetics · 7 marks
The equation for the Haber process used in the production of ammonia is shown. …
Question 7Chemistry of the environment · 11 marks
(a) Dilute ethanoic acid reacts with aqueous calcium hydroxide. 2CH3COOH + Ca(OH)2 (CH3COO)2Ca …
Question 8Chemical reactions · 7 marks
(a) Ethanoic acid is manufactured from methanol. CH3OH(g) + CO(g) CH3COOH(g) The forward reaction is exothermic. (i) Predict and explain the effect, if any, on the position of equilibrium when the pressure is decreased and the temperature remains constant. (ii) …
Question 9Stoichiometry · 9 marks
(a) Table 9.1 shows the melting points and relative electrical conductivities of three elements. Table 9.1 carbon (graphite) magnesium phosphorus melting point …

Other Chemistry papers from Oct/Nov 2023

Questions students ask

Where can I get the 5070/21 Oct/Nov 2023 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_w23_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 2023?

54 marks out of 80, a C needed 25.

Which topics came up in 5070/21 Oct/Nov 2023?

Mostly Chemistry of the environment, Chemical reactions, Atoms, elements and compounds. The full list is in the table above.

Do I need an account to open 5070/21 Oct/Nov 2023?

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.