Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 May/June 2020 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2020: the question paper and its official mark scheme, 10 questions worth 85 marks. Free to open, no account needed.

Questions: 10
Marks: 85

Open the question paper Mark scheme

File names: 5070_s20_qp_21 · 5070_s20_ms_21

Topics in this paper

Which syllabus chapters 5070/21 May/June 2020 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Organic chemistry	3	28
Chemistry of the environment	2	20
Acids, bases and salts	2	15
Electrochemistry	1	8
Chemical energetics	1	8
Stoichiometry	1	6

Questions in 5070/21 May/June 2020

Question 1Acids, bases and salts · 5 marks
Choose from the following oxides to answer the questions. calcium oxide carbon monoxide copper(II) oxide nitrogen dioxide nitrogen monoxide silicon dioxide sulfur dioxide water zinc oxide Each oxide may be used once, more than once or not at all. Which …
Question 2Electrochemistry · 8 marks
Part of the reactivity series is shown. calcium aluminium manganese zinc more reactive less reactive (a) Predict the names of the products formed when manganese reacts with dilute hydrochloric acid. (b) A sample of manganese(II) carbonate, MnCO3, is heated strongly. …
Question 3Chemical energetics · 8 marks
The equation for the decomposition of hydrogen peroxide is shown. …
Question 4Organic chemistry · 12 marks
The table shows some properties of five esters. name structure relative molecular mass melting point / °C boiling point / °C methyl ethanoate CH3COOCH3 …
Question 5Stoichiometry · 6 marks
Hydrochloric acid, HCl, reacts with barium hydroxide, Ba(OH)2, as shown. 2HCl (aq) + Ba(OH)2(aq) BaCl 2(aq) …
Question 6Organic chemistry · 6 marks
The structures of two carboxylic acids are shown. …
Question 7Chemistry of the environment · 10 marks
Carbon dioxide is a colourless gas found in air. (a) The percentage of carbon dioxide in the air is increasing. State one environmental problem caused by this increase. (b) Carbon dioxide is a product of the complete combustion of octane, …
Question 8Acids, bases and salts · 10 marks
This question is about the chlorides of the elements in Period 3. (a) State the electronic configuration of the positive ion in sodium chloride, NaCl. (b) Magnesium chloride crystals can be prepared by reacting an insoluble base with an acid. …
Question 9Chemistry of the environment · 10 marks
Iron is a transition element. (a) State two physical properties of iron that are typical of a transition element. …
Question 10Organic chemistry · 10 marks
Fractional distillation and cracking are important processes in the conversion of petroleum (crude oil) into useful substances. (a) Complete the sentence about petroleum (crude oil). Choose from the list. an alloy a compound an element a mixture a polymer a …

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Questions students ask

Where can I get the 5070/21 May/June 2020 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_s20_ms_21), and on a wide screen it sits beside the question you are reading.

Which topics came up in 5070/21 May/June 2020?

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

Do I need an account to open 5070/21 May/June 2020?

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.