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2021

Cambridge IGCSE ยท 0620 ยท Paper 4 ยท Theory (Extended)

Chemistry 0620/42 Oct/Nov 2021 past paper

Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Oct/Nov 2021: the question paper and its official mark scheme, 6 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.

Questions
6
Marks
80
Grade A from
44
Open the question paperMark scheme

File names: 0620_w21_qp_42 ยท 0620_w21_ms_42

Grade thresholds for 0620/42 Oct/Nov 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.

ABCDEFG
4434252015117

Topics in this paper

Which syllabus chapters 0620/42 Oct/Nov 2021 tested, by marks. Each chapter links to every past-paper question on it.

ChapterQuestionsMarks
The Periodic Table122
Chemical energetics117
Organic chemistry112
States of matter111
Stoichiometry110
Atoms, elements and compounds18

Questions in 0620/42 Oct/Nov 2021

  1. Question 1States of matter ยท 11 marks

    This question is about states of matter. (a) Complete the table, using ticks (๏€ณ ) and crosses (๏€ท ), to describe the properties of gases, liquids and solids. state of matter particles are touching particles have random movement particles are โ€ฆ

  2. Question 2Stoichiometry ยท 10 marks

    Acids are important laboratory chemicals. (a) Some acids completely dissociate in water to form ions. (i) State the term applied to acids that completely dissociate in water. (ii) Complete the equation to show the complete dissociation of sulfuric acid in โ€ฆ

  3. Question 3Atoms, elements and compounds ยท 8 marks

    Atoms contain protons, neutrons and electrons. (a) Complete the table to show the relative mass and the relative charge of a proton, a neutron and an electron. relative mass relative charge proton neutron electron โ€ฆ

  4. Question 4Chemical energetics ยท 17 marks

    Chlorine reacts with carbon monoxide to produce phosgene gas, COCl 2(g). A catalyst is used. Cl 2(g) + CO(g) COCl 2(g) The reaction is exothermic. (a) Explain why the reaction is exothermic in terms of the energy changes of bond โ€ฆ

  5. Question 5The Periodic Table ยท 22 marks

    Iron is a transition element. Potassium is a Group I element. (a) Iron and potassium have the same type of bonding. Name and describe the type of bonding in these two elements. name description  (b) Transition elements and Group โ€ฆ

  6. Question 6Organic chemistry ยท 12 marks

    Ethanol, C2H5OH, belongs to the homologous series called alcohols. (a) Write the general formula of alcohols. (b) Explain why ethanol cannot be described as a hydrocarbon. (c) Ethanol can be manufactured from different substances by reaction with steam or by โ€ฆ

Other Chemistry papers from Oct/Nov 2021

Questions students ask

Where can I get the 0620/42 Oct/Nov 2021 mark scheme?
Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_w21_ms_42), and on a wide screen it sits beside the question you are reading.
What was the grade threshold for an A in 0620/42 Oct/Nov 2021?
44 marks out of 80, a C needed 25.
Which topics came up in 0620/42 Oct/Nov 2021?
Mostly The Periodic Table, Chemical energetics, Organic chemistry. The full list is in the table above.
Do I need an account to open 0620/42 Oct/Nov 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.