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

Chemistry 0620/42 Oct/Nov 2016 past paper

Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Oct/Nov 2016: the question paper and its official mark scheme, 7 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.

Questions: 7
Marks: 80
Grade A from: 46

Open the question paper Mark scheme

File names: 0620_w16_qp_42 · 0620_w16_ms_42

Grade thresholds for 0620/42 Oct/Nov 2016

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	F	G
46	36	26	23	19	15	11

Topics in this paper

Which syllabus chapters 0620/42 Oct/Nov 2016 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Acids, bases and salts	2	28
Chemistry of the environment	2	17
Stoichiometry	1	12
Atoms, elements and compounds	1	12
Electrochemistry	1	11

Questions in 0620/42 Oct/Nov 2016

Question 1Chemistry of the environment · 9 marks
Particles behave differently when in different physical states. (a) Solids have a fixed volume and a definite shape. Gases have no fixed volume and take the shape of the container. Describe the volume and shape of liquids. (b) Complete the …
Question 2Stoichiometry · 12 marks
This question is about atoms, ions and isotopes. (a) Define the term nucleon number. (b) Give the electronic structure of the following atom and ion. Na P3– (c) State one medical use of radioactive isotopes. (d) What is meant by …
Question 3Chemistry of the environment · 8 marks
Clean, dry air contains a small amount of carbon dioxide. (a) The percentages of the other gases present in clean, dry air are shown in the table. Complete the table by inserting the names of these gases. name of gas …
Question 4Acids, bases and salts · 7 marks
Dilute nitric acid behaves as a typical acid in some reactions but not in other reactions. (a) Dilute nitric acid behaves as a typical acid when reacted with copper(II) oxide and with copper(II) carbonate. Describe what you would see if …
Question 5Acids, bases and salts · 21 marks
Chlorine, bromine and iodine are halogens. (a) Chlorine can be made in the laboratory by heating manganese(IV) oxide with concentrated hydrochloric acid. MnO2(s) + 4HCl (aq) → MnCl 2(aq) …
Question 6Electrochemistry · 11 marks
Aluminium is a very important metal. Aluminium is extracted from its ore, bauxite, by electrolysis. Bauxite is an impure form of aluminium oxide, Al 2O3. (a) Describe how aluminium is extracted from bauxite. Include an ionic half-equation for the reaction …
Question 7Atoms, elements and compounds · 12 marks
Proteins are a major constituent of food. Proteins are polymers. (a) What is a polymer? (b) Proteins can be converted into amino acids. (i) Name the type of chemical reaction which occurs when proteins are converted into amino acids. (ii) …

Other Chemistry papers from Oct/Nov 2016

Questions students ask

Where can I get the 0620/42 Oct/Nov 2016 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_w16_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 2016?

46 marks out of 80, a C needed 26.

Which topics came up in 0620/42 Oct/Nov 2016?

Mostly Acids, bases and salts, Chemistry of the environment, Stoichiometry. The full list is in the table above.

Do I need an account to open 0620/42 Oct/Nov 2016?

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.