Cambridge IGCSE · 0620 · Paper 3 · Theory (Core)

Chemistry 0620/32 Oct/Nov 2025 past paper

Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Core)), variant 2, Oct/Nov 2025: the question paper and its official mark scheme, 8 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.

Questions: 8
Marks: 80
Grade A from: 40

Open the question paper Mark scheme

File names: 0620_w25_qp_32 · 0620_w25_ms_32

Grade thresholds for 0620/32 Oct/Nov 2025

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
40	34	27	20	13

Topics in this paper

Which syllabus chapters 0620/32 Oct/Nov 2025 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
The Periodic Table	2	21
Organic chemistry	1	17
Stoichiometry	2	15
Metals	1	13
Electrochemistry	1	8
Atoms, elements and compounds	1	6

Questions in 0620/32 Oct/Nov 2025

Question 1The Periodic Table · 4 marks
Fig. 1.1 shows part of the Periodic Table. …
Question 2Atoms, elements and compounds · 6 marks
The symbol for an atom of krypton is shown. 36 84Kr (a) Complete Table 2.1 to show the number of electrons and neutrons in one atom of 36 84Kr . Table 2.1 number of electrons number of neutrons (b) Krypton …
Question 3Stoichiometry · 10 marks
(a) Table 3.1 shows the masses of ions, in mg, present in a 500 cm3 sample of contaminated water. Table 3.1 name of ion formula of ion mass of ion in 500 cm3 of contaminated water / mg ammonium 2.5 …
Question 4Organic chemistry · 17 marks
(a) Molecules of compound A are found in some plants. Fig. 4.1 shows the displayed formula of a molecule of compound …
Question 5The Periodic Table · 17 marks
This question is about elements in different groups of the Periodic Table and their compounds. (a) Nitrogen is in Group V of the Periodic Table. Explain why nitrogen is placed in Group V. Give your answer in terms of electronic …
Question 6Metals · 13 marks
This question is about metals. (a) Iron is extracted from its ore using carbon in a blast furnace. Aluminium is extracted from its ore using electrolysis. (i) Name the main ore of aluminium. (ii) Explain why aluminium is not extracted …
Question 7Electrochemistry · 8 marks
Fig. 7.1 shows the apparatus used to pass electricity through molten magnesium chloride using platinum electrodes. power supply crucible + – Fig. 7.1 (a) Name the process shown in Fig. 7.1. (b) Label the electrolyte in Fig. 7.1. (c) Name …
Question 8Stoichiometry · 5 marks
Excess dilute hydrochloric acid is added to aqueous sodium sulfide to form aqueous sodium chloride and gaseous hydrogen sulfide, H2S. 2HCl (aq) + Na2S(aq) 2NaCl (aq) + H2S(g) Fig. 8.1 shows the total volume of hydrogen sulfide gas, H2S, produced …

Other Chemistry papers from Oct/Nov 2025

Questions students ask

Where can I get the 0620/32 Oct/Nov 2025 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_w25_ms_32), and on a wide screen it sits beside the question you are reading.

What was the grade threshold for an A in 0620/32 Oct/Nov 2025?

40 marks out of 80, a C needed 27.

Which topics came up in 0620/32 Oct/Nov 2025?

Mostly The Periodic Table, Organic chemistry, Stoichiometry. The full list is in the table above.

Do I need an account to open 0620/32 Oct/Nov 2025?

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.