Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 May/June 2019 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2019: the question paper and its official mark scheme, 10 questions worth 85 marks, with the grade thresholds. Free to open, no account needed.

Questions: 10
Marks: 75
Grade A from: 52

Open the question paper Mark scheme

File names: 5070_s19_qp_21 · 5070_s19_ms_21

Grade thresholds for 5070/21 May/June 2019

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
52	40	26	21	14

Topics in this paper

Which syllabus chapters 5070/21 May/June 2019 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Chemistry of the environment	2	18
Stoichiometry	2	17
Electrochemistry	1	12
Chemical reactions	1	10
States of matter	1	10
Metals	1	7
Acids, bases and salts	1	6
Atoms, elements and compounds	1	5

Questions in 5070/21 May/June 2019

Question 1Atoms, elements and compounds · 5 marks
Choose from the particles shown to answer the questions. 79 35Br 39 20Ca 35 17Cl 37 17Cl − 37 17Cl 64 29Cu 23 11Na 20 10Ne …
Question 2Electrochemistry · 12 marks
The table shows some of the properties of the elements in Group II of the Periodic Table. element proton (atomic) number atomic radius / nm melting point / °C Be …
Question 3Metals · 7 marks
Molybdenum, Mo, is a transition element. (a) Suggest one physical property of molybdenum that is typical of a transition element. (b) Suggest one chemical property of molybdenum compounds that is typical of compounds of transition elements. (c) Molybdenum steel is …
Question 4Chemistry of the environment · 8 marks
Air is a source of many gases. (a) What is the percentage by volume of nitrogen in dry air? (b) Outline the separation of oxygen, nitrogen and the noble gases from liquid air. (c) State one large scale use of …
Question 5Stoichiometry · 7 marks
Acid U is a compound containing carbon, hydrogen and oxygen. …
Question 6Acids, bases and salts · 6 marks
Propanoic acid is a weak acid. Calcium hydroxide and calcium oxide are bases. (a) What is the meaning of the term acid in weak acid? (b) What is the meaning of the term weak in weak acid? (c) Describe how …
Question 7Chemistry of the environment · 10 marks
Ammonium carbonate, (NH4)2CO3, is a white solid which decomposes when heated. (NH4)2CO3(s) 2NH3(g) + CO2(g) …
Question 8Chemical reactions · 10 marks
A scientist heats a sample of phosphorus(V) chloride in a closed container. A dynamic equilibrium is established. PCl 5(g) PCl 3(g) + Cl 2(g) (a) Describe what is meant by the term dynamic equilibrium. (b) The pressure of the equilibrium …
Question 9States of matter · 10 marks
Food packaging produces lots of waste. This waste includes both plastic and glass. (a) One of the plastics is the addition polymer poly(propene). Complete the equation by drawing the partial structure of poly(propene). …
Question 10Stoichiometry · 10 marks
Cyclobutane and butene are both hydrocarbons. cyclobutane butene …

Other Chemistry papers from May/June 2019

Questions students ask

Where can I get the 5070/21 May/June 2019 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_s19_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 2019?

52 marks out of 75, a C needed 26.

Which topics came up in 5070/21 May/June 2019?

Mostly Chemistry of the environment, Stoichiometry, Electrochemistry. The full list is in the table above.

Do I need an account to open 5070/21 May/June 2019?

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.