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

Chemistry 0620/31 Oct/Nov 2017 past paper

Cambridge IGCSE Chemistry (0620) Paper 3 (Theory (Core)), variant 1, Oct/Nov 2017: 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: 50

Open the question paper Mark scheme

File names: 0620_w17_qp_31 · 0620_w17_ms_31

Grade thresholds for 0620/31 Oct/Nov 2017

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
50	43	34	27	20

Topics in this paper

Which syllabus chapters 0620/31 Oct/Nov 2017 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Atoms, elements and compounds	2	21
Stoichiometry	2	19
Acids, bases and salts	1	14
The Periodic Table	1	9
Organic chemistry	1	9
Electrochemistry	1	8

Questions in 0620/31 Oct/Nov 2017

Question 1Atoms, elements and compounds · 8 marks
The diagram shows the structures of five substances, …
Question 2Atoms, elements and compounds · 13 marks
The table shows the composition of the atmosphere of the planet Neptune. gas present percentage of gas in Neptune’s atmosphere helium 19.5 hydrogen 78.8 methane other gases 0.2 (a) Complete the table to calculate the percentage of methane in Neptune’s …
Question 3Acids, bases and salts · 14 marks
The following substances are present in a liquid floor cleaner. coloured dyes ethanol preservatives sodium carbonate (a) (i) Balance the chemical equation for the complete combustion of ethanol. C2H5OH + 3O2 CO2 + H2O (ii) Draw the structure of an …
Question 4Electrochemistry · 8 marks
The table shows the properties of four substances. substance boiling point electrical conductivity of solid electrical conductivity when molten density in g / cm3 graphite 2.25 iodine low does not conduct does not conduct 4.93 potassium high conducts 0.86 zinc …
Question 5The Periodic Table · 9 marks
Titanium is extracted from an ore which contains titanium(IV) oxide, TiO2. (a) (i) Balance the chemical equation for the first step in this extraction. TiO2 …
Question 6Organic chemistry · 9 marks
The diagram shows a fractionating column used for the fractional distillation of petroleum. kerosene fraction naphtha fraction gasoline fraction refinery gas diesel oil fraction fuel oil fraction lubricating fraction and bitumen (a) Describe the fractional distillation of petroleum. In your …
Question 7Stoichiometry · 13 marks
Bromine is a red-brown liquid which is soluble in cyclohexane. (a) A few drops of liquid bromine were placed at the bottom of a beaker containing cyclohexane. After 3 days, a red-brown colour had spread throughout the beaker. at the …
Question 8Stoichiometry · 6 marks
Ammonia is manufactured by combining nitrogen and hydrogen at high temperature and pressure. catalyst nitrogen + hydrogen ammonia (a) (i) What is the meaning of the symbol ? (ii) What is the purpose of the catalyst? (b) The graph shows …

Other Chemistry papers from Oct/Nov 2017

Questions students ask

Where can I get the 0620/31 Oct/Nov 2017 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (0620_w17_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 2017?

50 marks out of 80, a C needed 34.

Which topics came up in 0620/31 Oct/Nov 2017?

Mostly Atoms, elements and compounds, Stoichiometry, Acids, bases and salts. The full list is in the table above.

Do I need an account to open 0620/31 Oct/Nov 2017?

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.