Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 Oct/Nov 2018 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, Oct/Nov 2018: 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_w18_qp_21 · 5070_w18_ms_21

Grade thresholds for 5070/21 Oct/Nov 2018

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	36	23	18	13

Topics in this paper

Which syllabus chapters 5070/21 Oct/Nov 2018 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Chemistry of the environment	2	20
Acids, bases and salts	2	17
Organic chemistry	1	11
Metals	1	10
The Periodic Table	1	10
Stoichiometry	1	10
Atoms, elements and compounds	1	7

Questions in 5070/21 Oct/Nov 2018

Question 1Atoms, elements and compounds · 7 marks
The electronic configurations of five atoms are shown. …
Question 2Metals · 10 marks
Zinc reacts with aqueous nickel(II) nitrate. Zn(s) + Ni(NO3)2(aq) Zn(NO3)2(aq) + Ni(s) (a) (i) By referring to the equation, explain why this is a redox reaction. (ii) Construct the ionic equation for this reaction. (b) Draw a labelled diagram to …
Question 3Acids, bases and salts · 7 marks
Tartaric acid and succinic acid are colourless organic acids. The structures of these acids are shown. …
Question 4Organic chemistry · 11 marks
The alkanes are a homologous series of saturated hydrocarbons. (a) (i) Write the general formula for the alkane homologous series. (ii) Each member of a particular homologous series has the same general formula. Give one other characteristic of a homologous …
Question 5Acids, bases and salts · 10 marks
The Periodic Table is an arrangement of elements in groups and periods. (a) Describe how the position of an element in the Periodic Table is related to its electronic configuration. (b) Aluminium is an element in Group III of the …
Question 6Chemistry of the environment · 10 marks
Some properties of the Group V elements are shown. element electrical conductivity of solid melting point / °C boiling point / °C nitrogen non-conductor –210 –196 phosphorus non-conductor 44 281 arsenic non-conductor antimony poor conductor 631 1587 bismuth conducts …
Question 7Chemistry of the environment · 10 marks
The products of respiration are carbon dioxide and water. (a) Complete the equation for respiration. …
Question 8The Periodic Table · 10 marks
Chromium is a transition element. Sodium is an element in Group I of the Periodic Table. (a) Explain how both chromium and sodium conduct electricity. (b) Describe two differences in the physical properties of chromium and sodium. …
Question 9Stoichiometry · 10 marks
Cerium is a metal with a relative atomic mass of 140. Cerium powder reacts with sulfuric acid. 2Ce(s) + 3H2SO4(aq) Ce2(SO4)3(aq) …

Other Chemistry papers from Oct/Nov 2018

Questions students ask

Where can I get the 5070/21 Oct/Nov 2018 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_w18_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 2018?

49 marks out of 75, a C needed 23.

Which topics came up in 5070/21 Oct/Nov 2018?

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

Do I need an account to open 5070/21 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.