Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 May/June 2021 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2021: 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: 50

Open the question paper Mark scheme

File names: 5070_s21_qp_21 · 5070_s21_ms_21

Grade thresholds for 5070/21 May/June 2021

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
50	37	25	19	13

Topics in this paper

Which syllabus chapters 5070/21 May/June 2021 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Organic chemistry	2	20
States of matter	1	12
Chemistry of the environment	1	10
Chemical reactions	1	10
Acids, bases and salts	1	10
Metals	1	9
Atoms, elements and compounds	1	8
Electrochemistry	1	6

Questions in 5070/21 May/June 2021

Question 1Electrochemistry · 6 marks
Choose from the following compounds to answer the questions. …
Question 2States of matter · 12 marks
Helium, neon, argon, krypton, xenon and radon are noble gases in Group VIII. (a) Name the noble gas which has the greatest volume composition in air. (b) State one use for helium. (c) Radon is very unreactive. Use the electronic …
Question 3Organic chemistry · 10 marks
Petroleum (crude oil) is a mixture of hydrocarbons. (a) Petroleum (crude oil) is separated into fractions such as liquefied petroleum gas, petrol (gasoline) and naphtha. (i) Name the process used to separate petroleum (crude oil) into fractions. (ii) Name one …
Question 4Atoms, elements and compounds · 8 marks
Copper(II) chloride, copper(II) iodide and copper(II) carbonate are ionic compounds. (a) Predict two physical properties, other than electrical conductivity, of copper(II) chloride. …
Question 5Metals · 9 marks
Iron pyrite, FeS2, is an ore of iron. When heated in air, FeS2 produces both iron(III) oxide and sulfur dioxide. (a) Balance the equation shown. . FeS2 …
Question 6Chemistry of the environment · 10 marks
Carbon dioxide and water vapour are greenhouse gases found in air. (a) (i) Name one other greenhouse gas. (ii) State one environmental problem that may be caused by an increase in the percentage of carbon dioxide in the air. (b) …
Question 7Chemical reactions · 10 marks
Aqueous ammonium nitrite, NH4NO2(aq), decomposes when heated, as shown. NH4NO2(aq) …
Question 8Acids, bases and salts · 10 marks
Silver is a transition element with proton number 47. (a) Use the Periodic Table to state the number of occupied electron shells in an atom of silver. (b) Describe, with the aid of a diagram, the metallic bonding in silver. …
Question 9Organic chemistry · 10 marks
The structure of propenyl ethanoate is shown. …

Other Chemistry papers from May/June 2021

Questions students ask

Where can I get the 5070/21 May/June 2021 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_s21_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 May/June 2021?

50 marks out of 75, a C needed 25.

Which topics came up in 5070/21 May/June 2021?

Mostly Organic chemistry, States of matter, Chemistry of the environment. The full list is in the table above.

Do I need an account to open 5070/21 May/June 2021?

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.