Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 Oct/Nov 2017 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, Oct/Nov 2017: the question paper and its official mark scheme, 9 questions worth 85 marks, with the grade thresholds. Free to open, no account needed.

Questions: 9
Marks: 75
Grade A from: 49

Open the question paper Mark scheme

File names: 5070_w17_qp_21 · 5070_w17_ms_21

Grade thresholds for 5070/21 Oct/Nov 2017

The minimum raw marks Cambridge set for each grade on this component (out of 75). Thresholds change every session and variant, so always compare your score with the paper you actually sat.

A	B	C	D	E
49	35	22	18	12

Topics in this paper

Which syllabus chapters 5070/21 Oct/Nov 2017 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Metals	2	18
Organic chemistry	2	14
Atoms, elements and compounds	1	13
Acids, bases and salts	1	10
The Periodic Table	1	10
Chemistry of the environment	1	10
Chemical reactions	1	10

Questions in 5070/21 Oct/Nov 2017

Question 1Metals · 9 marks
A1 (a) Choose from the following elements to answer the questions. calcium chlorine chromium copper krypton nitrogen oxygen sodium sulfur Each element may be used once, more than once or not at all. Which element: (i) is a monatomic gas, …
Question 2Atoms, elements and compounds · 13 marks
A2 Copper(II) sulfate is an ionic compound. (a) Describe the arrangement of the ions and the type of attractive forces between the ions in solid copper(II) sulfate. arrangement type of attractive forces (b) Explain why solid copper(II) sulfate does not …
Question 3Metals · 9 marks
A3 The diagram shows the structure of a metal. …
Question 4Organic chemistry · 9 marks
A4 The structure of malic acid is shown. …
Question 5Organic chemistry · 5 marks
A5 Hydrocarbons undergo complete combustion to form carbon dioxide and water. (a) Construct the equation for the complete combustion of butane, C4H10. (b) The combustion of butane is exothermic. Explain in terms of bond making and bond breaking why this …
Question 6Acids, bases and salts · 10 marks
B6 Ethanoic acid is a weak acid. (a) What is meant by the term weak acid ? (b) Ethanoic acid reacts with ethanol to form ethyl ethanoate. The reaction is exothermic. CH3COOH + C2H5OH CH3COOC2H5 + H2O Describe and explain …
Question 7The Periodic Table · 10 marks
B7 Some properties of the Group IV elements are shown in the table. element melting point / °C relative electrical conductivity carbon (diamond) 3550 non-conductor silicon 1410 poor conductor germanium 937 poor conductor tin 232 conductor lead 328 conductor (a) …
Question 8Chemistry of the environment · 10 marks
B8 Concentrated aqueous ammonia is used to make fertilisers such as ammonium phosphate, (NH4)3PO4. (a) Calculate the percentage by mass of nitrogen in ammonium phosphate. % by mass (b) Explain why farmers spread nitrogen-containing fertilisers on their fields. (c) Describe …
Question 9Chemical reactions · 10 marks
B9 Cyclopropane is converted to propene when heated. H2C H2C CH2 CH3CH = CH2 cyclopropane (a) Explain why cyclopropane and propene are isomers. (b) The graph shows how the concentration of propene in this reaction changes with time. concentration of …

Other Chemistry papers from Oct/Nov 2017

Questions students ask

Where can I get the 5070/21 Oct/Nov 2017 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_w17_ms_21), and on a wide screen it sits beside the question you are reading.

What was the grade threshold for an A in 5070/21 Oct/Nov 2017?

49 marks out of 75, a C needed 22.

Which topics came up in 5070/21 Oct/Nov 2017?

Mostly Metals, Organic chemistry, Atoms, elements and compounds. The full list is in the table above.

Do I need an account to open 5070/21 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.