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

Chemistry 0620/43 Oct/Nov 2018 past paper

Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 3, Oct/Nov 2018: 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: 51

Open the question paper Mark scheme

File names: 0620_w18_qp_43 · 0620_w18_ms_43

Grade thresholds for 0620/43 Oct/Nov 2018

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
51	40	29	25	22	18	14

Topics in this paper

Which syllabus chapters 0620/43 Oct/Nov 2018 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Acids, bases and salts	1	18
Metals	1	16
Organic chemistry	1	15
Electrochemistry	1	12
Chemical reactions	1	11
Chemistry of the environment	1	8

Questions in 0620/43 Oct/Nov 2018

Question 1Chemistry of the environment · 8 marks
Answer the following questions using only the substances in the list. Each substance may be used once, more than once or not at all. ammonia bauxite carbon dioxide carbon monoxide hematite oxygen sodium chloride sulfur dioxide State which substance is: …
Question 2Electrochemistry · 12 marks
This question is about electrolysis. (a) (i) What is meant by the term electrolysis? (ii) Name the type of particle responsible for the conduction of electricity during electrolysis in: the metal wires the electrolyte (b) The table gives information about …
Question 3Metals · 16 marks
Tin is a metallic element in Group IV. Its main ore is cassiterite which is an impure form of tin(IV) oxide, SnO2. Tin also occurs in stannite, Cu2FeSnS4. (a) Calculate the relative formula mass, Mr, of Cu2FeSnS4. Mr of Cu2FeSnS4 …
Question 4Acids, bases and salts · 18 marks
(a) Dilute sulfuric acid and aqueous potassium hydroxide can be used to make potassium sulfate crystals using a method that includes titration. conical flask dilute sulfuric acid 25.0 cm3 of aqueous potassium hydroxide A student titrated 25.0 cm3 of 0.0500 …
Question 5Chemical reactions · 11 marks
A student investigates the rate of reaction between lumps of calcium carbonate and dilute hydrochloric acid using the apparatus shown. CaCO3(s) + 2HCl (aq) CaCl 2(aq) + CO2(g) + H2O(l) The calcium carbonate was in excess. dilute hydrochloric acid gas …
Question 6Organic chemistry · 15 marks
(a) Ethanol can be manufactured by fermentation and by hydration. (i) Describe these two processes of ethanol manufacture. In each case you should: ● identify the reactants ● give the reaction conditions ● write a chemical equation for the reaction …

Other Chemistry papers from Oct/Nov 2018

Questions students ask

Where can I get the 0620/43 Oct/Nov 2018 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_w18_ms_43), and on a wide screen it sits beside the question you are reading.

What was the grade threshold for an A in 0620/43 Oct/Nov 2018?

51 marks out of 80, a C needed 29.

Which topics came up in 0620/43 Oct/Nov 2018?

Mostly Acids, bases and salts, Metals, Organic chemistry. The full list is in the table above.

Do I need an account to open 0620/43 Oct/Nov 2018?

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.