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

Chemistry 0620/33 May/June 2021 past paper

Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Core)), variant 3, May/June 2021: 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: 38

Open the question paper Mark scheme

File names: 0620_s21_qp_33 · 0620_s21_ms_33

Grade thresholds for 0620/33 May/June 2021

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
38	31	23	15	7

Topics in this paper

Which syllabus chapters 0620/33 May/June 2021 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Chemistry of the environment	3	32
Atoms, elements and compounds	2	17
Organic chemistry	1	12
The Periodic Table	1	12
Electrochemistry	1	7

Questions in 0620/33 May/June 2021

Question 1Atoms, elements and compounds · 8 marks
(a) The electronic structures of five atoms, …
Question 2Chemistry of the environment · 13 marks
The table shows the masses of some of the ions in 1000 cm3 of fruit juice. name of ion formula of ion mass of ion in 1000 cm3 of fruit juice / mg ammonium NH4 + 6 calcium Ca2+ 73 …
Question 3Atoms, elements and compounds · 9 marks
The table shows some properties of five halogens. element melting point / °C boiling point / °C density of liquid at boiling point in g / cm3 colour fluorine –220 –188 yellow chlorine –35 1.56 light green bromine …
Question 4Organic chemistry · 12 marks
(a) The structure of two organic compounds, F and G, are shown. …
Question 5Chemistry of the environment · 12 marks
(a) Cement is made by heating a mixture of calcium carbonate and powdered clay. (i) Choose from the list the name of the substance which contains calcium carbonate. Draw a circle around the correct answer. bauxite hematite limestone slaked lime …
Question 6Chemistry of the environment · 7 marks
This question is about air. (a) State the percentage of nitrogen in clean, dry air. …
Question 7Electrochemistry · 7 marks
Concentrated hydrochloric acid is electrolysed using carbon electrodes. (a) State the products of this electrolysis at: the negative electrode the positive electrode. (b) Name a metal that can be used as an inert electrode instead of carbon. (c) When …
Question 8The Periodic Table · 12 marks
This question is about elements in the Periodic Table. (a) The table shows some properties of five elements, …

Other Chemistry papers from May/June 2021

Questions students ask

Where can I get the 0620/33 May/June 2021 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_s21_ms_33), and on a wide screen it sits beside the question you are reading.

What was the grade threshold for an A in 0620/33 May/June 2021?

38 marks out of 80, a C needed 23.

Which topics came up in 0620/33 May/June 2021?

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

Do I need an account to open 0620/33 May/June 2021?

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.