Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/22 May/June 2019 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 2, 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
- 47
File names: 5070_s19_qp_22 · 5070_s19_ms_22
Grade thresholds for 5070/22 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 |
|---|---|---|---|---|
| 47 | 35 | 23 | 19 | 13 |
Topics in this paper
Which syllabus chapters 5070/22 May/June 2019 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/22 May/June 2019
- Question 1
Choose from the particles shown to answer the questions. CH4 Cl − Fe2+ H+ H2S MnO4 − NH4 + P3− Each particle can be used once, more than once or not at all. (a) Which particle has only eighteen protons? …
- Question 2
The table shows some of the properties of the elements in Group III of the Periodic Table. element proton (atomic) number atomic radius / nm melting point …
- Question 3
Titanium, Ti, is a metallic element. (a) Suggest one physical property of titanium. (b) Titanium(IV) chloride, TiCl 4, is a colourless liquid that has a low boiling point. (i) Suggest the structure and bonding in TiCl 4. (ii) Titanium(IV) chloride …
- Question 4
Petroleum (crude oil) is an important source of many chemicals. (a) Outline the separation of petroleum (crude oil) into fractions such as petrol, diesel and bitumen. (b) State one large scale use of bitumen. (c) Long chain hydrocarbons can be …
- Question 5
W is a compound containing carbon, hydrogen and oxygen. (a) W contains 57.1% carbon and 4.8% hydrogen by mass. Calculate the empirical formula of W. empirical formula …
- Question 6
Drinking water is obtained by purification of sea water and river water. (a) Desalination is used to convert sea water into drinking water. What is desalination? (b) River water is often polluted by phosphates and nitrates. (i) Give the source …
- Question 7
Ammonium iodide, NH4I, is a white solid which decomposes when heated. NH4I(s) NH3(g) + HI(g) (a) A small sample of ammonium iodide is heated in a test-tube. Describe how you would know when all the ammonium iodide has decomposed. (b) …
- Question 8
Nitrogen monoxide reacts with oxygen to form nitrogen dioxide. If this reaction is investigated in a closed system, a dynamic equilibrium is established. 2NO(g) + O2(g) 2NO2(g) (a) Explain why it is important to have a closed system to establish …
- Question 9
A sample of waste includes plastic and copper. (a) One of the plastics is the addition polymer poly(chloroethene). Complete the equation to show the formation of poly(chloroethene). C C Cl …
- Question 10
The structures of cyclobutanol and butanoic acid are shown. …
Other Chemistry papers from May/June 2019
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/21 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical