Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/22 Oct/Nov 2016 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 2, Oct/Nov 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
- 50
File names: 5070_w16_qp_22 · 5070_w16_ms_22
Grade thresholds for 5070/22 Oct/Nov 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 |
|---|---|---|---|---|
| 50 | 37 | 25 | 18 | 12 |
Topics in this paper
Which syllabus chapters 5070/22 Oct/Nov 2016 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Stoichiometry | 2 | 20 |
| Chemical reactions | 2 | 18 |
| Organic chemistry | 1 | 11 |
| Chemical energetics | 1 | 10 |
| Acids, bases and salts | 1 | 10 |
| The Periodic Table | 1 | 6 |
| Electrochemistry | 1 | 5 |
| Chemistry of the environment | 1 | 5 |
Questions in 5070/22 Oct/Nov 2016
- Question 1
A1 Choose from the following compounds to answer the questions below. BaCl …
- Question 2
A2 Farmers add fertilisers such as ammonium sulfate to the soil to increase the rate of plant growth. (a) Write the formulae of the ions present in ammonium sulfate. and (b) Describe a test for ammonium ions. test observation (c) …
- Question 3
A3 The alkanes are a homologous series of hydrocarbons. (a) State two properties of a homologous series. (b) Draw the structures of the branched and unbranched alkanes having four carbon atoms. Show all the atoms and all the bonds. (c) …
- Question 4
A4 Propanone, CH3COCH3, reacts with iodine, I2, to form colourless products. CH3COCH3 + I2 CH3COCH2I + HI The reaction is catalysed by hydrochloric acid. The table shows how the relative rate of this reaction changes when different concentrations of propanone, …
- Question 5
A5 Nickel carbonyl, Ni(CO)4, reacts with hydrogen iodide. Ni(CO)4(l) + 2HI(g) NiI2(s) …
- Question 6
A6 Sodium and rubidium are alkali metals. (a) Explain how metals conduct electricity. (b) State two trends in the properties of the alkali metals. (c) Name the products formed when rubidium reacts with water. and (d) Titanium is extracted from …
- Question 7
B7 In the contact process, sulfur trioxide is made by the catalytic oxidation of sulfur dioxide. In a closed container the following equilibrium is set up. 2SO2(g) + O2(g) 2SO3(g) The reaction is exothermic. (a) Name the catalyst used in …
- Question 8
B8 Propenenitrile, CH2=CHCN, is made by passing a mixture of propene, ammonia and oxygen over a catalyst at 450 °C. CH3CH=CH2 + NH3 + 1½O2 CH2=CHCN + 3H2O The reaction is exothermic. (a) Draw an energy profile diagram for this …
- Question 9
B9 Both copper and magnesium are metals. (a) Explain why magnesium reacts with hydrochloric acid but copper does not. (b) Brass is an alloy of copper and zinc. The table shows how the composition of brass influences its relative strength. …
- Question 10
B10 A student prepared some crystals of hydrated copper(II) sulfate by reacting excess insoluble copper(II) oxide with dilute sulfuric acid. CuO + H2SO4 + 4H2O CuSO4.5H2O (a) Describe how you would obtain pure dry crystals of hydrated copper(II) sulfate from …
Other Chemistry papers from Oct/Nov 2016
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/21 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical