Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/21 Oct/Nov 2012 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, Oct/Nov 2012: the question paper and its official mark scheme, 10 questions worth 85 marks. Free to open, no account needed.
- Questions
- 10
- Marks
- 85
File names: 5070_w12_qp_21 · 5070_w12_ms_21
Topics in this paper
Which syllabus chapters 5070/21 Oct/Nov 2012 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| The Periodic Table | 2 | 18 |
| Organic chemistry | 2 | 17 |
| Metals | 2 | 16 |
| Chemical reactions | 1 | 11 |
| Stoichiometry | 1 | 10 |
| Chemistry of the environment | 1 | 7 |
| Electrochemistry | 1 | 6 |
Questions in 5070/21 Oct/Nov 2012
- Question 1
A1 (a) Define the term element. (b) Choose from the following elements to answer the questions below. aluminium argon bromine gallium helium hydrogen magnesium nitrogen oxygen sodium Each element can be used once, more than once or not at all. …
- Question 2
For Examiner’s Use A2 Steel is more resistant to corrosion than iron. (a) What are the essential conditions for the corrosion of iron? (b) Ships’ hulls can be prevented from corroding by attaching pieces of magnesium to them. Explain why …
- Question 3
For Examiner’s Use A3 The table below shows both the formulae and boiling points of the first five members of the alcohol homologous series. alcohol formula boiling point / °C methanol CH3OH 65 ethanol C2H5OH 79 propanol C3H7OH 98 butanol …
- Question 4
For Examiner’s Use A4 Water from natural sources, such as lakes and rivers, contains many dissolved substances. (a) Name two dissolved substances that occur naturally in unpolluted water from lakes and rivers. (b) Pollution in lakes and rivers can be …
- Question 5
For Examiner’s Use A5 The diagram below shows the apparatus used to electrolyse aqueous sodium hydroxide in the laboratory. hydrogen oxygen power pack + – concentrated aqueous sodium hydroxide Electrolysis of the aqueous sodium hydroxide, results in the formation of …
- Question 6
For Examiner’s Use A6 A flow diagram for the manufacture of sulfuric acid is shown below. sulfur burner liquid sulfur sulfur dioxide sulfur trioxide 98% sulfuric acid 99.5% sulfuric acid + air converter air absorber water sulfuric acid (a) In …
- Question 7
B7 Tin is a metal in Group IV of the Periodic Table. (a) Draw a labelled diagram to show the structure of a metal. (b) Explain why metals (i) conduct electricity, (ii) are malleable. (c) At high temperatures, tin reacts …
- Question 8
For Examiner’s Use B8 Petroleum is separated into fractions by fractional distillation. (a) Explain how fractional distillation separates petroleum into different fractions. (b) The refinery gas fraction contains the first four members of the alkane homologous series. (i) Explain the …
- Question 9
For Examiner’s Use B9 (a) Define the term relative atomic mass. (b) The relative atomic mass of magnesium can be determined in the laboratory by finding the volume of hydrogen given off when magnesium reacts with hydrochloric acid. Mg + …
- Question 10
For Examiner’s Use B10 Limestone consists mainly of the compound calcium carbonate. (a) Explain why limestone is used in the blast furnace for the extraction of iron. Include any relevant equations in your answer. (b) Group II carbonates decompose on …
Other Chemistry papers from Oct/Nov 2012
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical