Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 May/June 2016 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2016: 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: 53

Open the question paper Mark scheme

File names: 5070_s16_qp_21 · 5070_s16_ms_21

Grade thresholds for 5070/21 May/June 2016

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
53	39	26	21	14

Topics in this paper

Which syllabus chapters 5070/21 May/June 2016 tested, by marks. Each chapter links to every past-paper question on it.

Chapter	Questions	Marks
Organic chemistry	3	22
Acids, bases and salts	2	20
Chemical reactions	1	10
Metals	1	10
Experimental techniques and chemical analysis	1	8
Chemistry of the environment	1	8
Stoichiometry	1	7

Questions in 5070/21 May/June 2016

Question 1Organic chemistry · 5 marks
A1 Choose from the following polymers to answer the questions. …
Question 2Acids, bases and salts · 10 marks
A2 Hydrogen sulfide, H2S, has a simple molecular structure. It is soluble in water. (a) Suggest one other physical property of hydrogen sulfide. (b) Aqueous hydrogen sulfide is a weak acid. (i) Write an equation to show the dissociation of …
Question 3Organic chemistry · 7 marks
A3 Esters, such as propyl ethanoate, are often used as solvents. (a) Give one other use for esters such as propyl ethanoate. (b) Draw the structure of propyl ethanoate, showing all of the atoms and all of the bonds. (c) …
Question 4Stoichiometry · 7 marks
A4 Ammonia is manufactured by the reaction between hydrogen and nitrogen in the Haber process. (a) State the conditions used in the Haber process. temperature pressure catalyst (b) Describe and explain the effect of increasing the pressure on the rate …
Question 5Experimental techniques and chemical analysis · 8 marks
A5 The statements give some of the chemical properties of metal X and its compounds. • X does not react with cold water. • X fizzes slowly with dilute hydrochloric acid. • X does not react with aqueous sodium chloride. …
Question 6Chemistry of the environment · 8 marks
A6 The atmosphere contains a large number of gases including oxygen, nitrogen, carbon dioxide, sulfur dioxide, oxides of nitrogen, methane and chlorofluorocarbons (CFCs). (a) Carbon dioxide, methane and CFCs are greenhouse gases. (i) State one effect of an increase in …
Question 7Acids, bases and salts · 10 marks
B7 Silver nitrate has the formula AgNO3. (a) Describe how a pure sample of silver nitrate crystals can be prepared from solid silver oxide, which is insoluble in water. (b) Aqueous zinc chloride is added to a sample of acidified …
Question 8Organic chemistry · 10 marks
B8 Cyclohexane, C6H12, is a cycloalkane. Cycloalkanes react in a similar way to alkanes. …
Question 9Chemical reactions · 10 marks
B9 Carbon reacts with steam in a reversible reaction. …
Question 10Metals · 10 marks
B10 Both zinc and iron react with dilute sulfuric acid. Zn(s) + H2SO4(aq) ZnSO4(aq) + H2(g) Fe(s) + H2SO4(aq) FeSO4(aq) …

Other Chemistry papers from May/June 2016

Questions students ask

Where can I get the 5070/21 May/June 2016 mark scheme?

Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_s16_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 2016?

53 marks out of 75, a C needed 26.

Which topics came up in 5070/21 May/June 2016?

Mostly Organic chemistry, Acids, bases and salts, Chemical reactions. The full list is in the table above.

Do I need an account to open 5070/21 May/June 2016?

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.