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

Chemistry 0620/31 Oct/Nov 2014 past paper

Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Extended)), variant 1, Oct/Nov 2014: 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: 38

Open the question paper Mark scheme

File names: 0620_w14_qp_31 · 0620_w14_ms_31

Grade thresholds for 0620/31 Oct/Nov 2014

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	29	19	18	15

Topics in this paper

Which syllabus chapters 0620/31 Oct/Nov 2014 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Chemistry of the environment	2	19
Metals	1	19
Acids, bases and salts	2	17
Organic chemistry	1	17
Atoms, elements and compounds	1	8

Questions in 0620/31 Oct/Nov 2014

Question 1Acids, bases and salts · 9 marks
(a) Match the following pH values to the solutions given below. …
Question 2Acids, bases and salts · 8 marks
Two macromolecular forms of carbon are graphite and diamond. The structures of graphite and diamond are given below. diamond graphite (a) Explain in terms of its structure why graphite is soft and is a good conductor of electricity. (b) State …
Question 3Chemistry of the environment · 12 marks
The main use of sulfur dioxide is the manufacture of sulfuric acid. (a) State two other uses of sulfur dioxide. (b) One source of sulfur dioxide is burning sulfur in air. Describe how sulfur dioxide can be made from the …
Question 4Metals · 19 marks
Iron is extracted from the ore hematite in the Blast Furnace. slag molten iron air firebrick lining CO forms CO2 forms waste gases raw materials: coke, C iron ore, Fe2O3 limestone, CaCO3 (a) The coke reacts with the oxygen in …
Question 5Chemistry of the environment · 7 marks
Three common pollutants in the air are carbon monoxide, the oxides of nitrogen, NO and NO2, and unburnt hydrocarbons. They are all emitted by motor vehicles. (a) Describe how the oxides of nitrogen are formed. (b) Describe how a catalytic …
Question 6Organic chemistry · 17 marks
Esters, polyesters and fats all contain the ester linkage. (a) Esters can be made from alcohols and carboxylic acids. For example, the ester ethyl ethanoate can be made by the following reaction. CH3COOH + CH3CH2OH → CH3COOCH2CH3 …
Question 7Atoms, elements and compounds · 8 marks
Nitrogen can form ionic compounds with reactive metals and covalent compounds with non-metals. (a) Nitrogen reacts with lithium to form the ionic compound lithium nitride, Li3N. (i) Write the equation for the reaction between lithium and nitrogen. (ii) Lithium nitride …

Other Chemistry papers from Oct/Nov 2014

Questions students ask

Where can I get the 0620/31 Oct/Nov 2014 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_w14_ms_31), and on a wide screen it sits beside the question you are reading.

What was the grade threshold for an A in 0620/31 Oct/Nov 2014?

38 marks out of 80, a C needed 19.

Which topics came up in 0620/31 Oct/Nov 2014?

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

Do I need an account to open 0620/31 Oct/Nov 2014?

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.