Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/22 Oct/Nov 2015 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 2, Oct/Nov 2015: 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
- 49
File names: 5070_w15_qp_22 · 5070_w15_ms_22
Grade thresholds for 5070/22 Oct/Nov 2015
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 |
|---|---|---|---|---|
| 49 | 35 | 22 | 17 | 12 |
Topics in this paper
Which syllabus chapters 5070/22 Oct/Nov 2015 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/22 Oct/Nov 2015
- Question 1
A1 Choose from the following elements to answer the questions below. aluminium argon carbon copper iodine iron lead magnesium nitrogen oxygen sulfur Each of these elements can be used once, more than once or not at all. Which element (a) …
- Question 2
A2 Plants contain many different types of carbon compounds. (a) Carbon compounds are made in plants by photosynthesis. Write the overall equation for photosynthesis and state the conditions required for this process. (b) Starch is a polymer found in plants. …
- Question 3
A3 Water for use in the home is treated using carbon and chlorine. (a) Explain the purpose of using carbon and chlorine in water treatment. carbon chlorine (b) In some parts of the world, drinking water is purified by desalination. …
- Question 4
A4 Iron is extracted in a blast furnace. The raw materials required are • iron ore, which contains iron(III) oxide, Fe2O3 , • limestone, • coke (carbon), • air. (a) The coke first burns in air to form carbon dioxide. …
- Question 5
A5 (a) Two students set up tubes as shown. cotton wool soaked in concentrated hydrochloric acid tube 1 tube 2 blue litmus paper cotton wool soaked in concentrated hydrobromic acid Concentrated hydrochloric acid produces fumes of hydrogen chloride. Concentrated hydrobromic …
- Question 6
A6 When one mole of sulfur burns, 247 kJ of energy is released. …
- Question 7
B7 The structures of diamond and silicon dioxide are shown. diamond silicon dioxide silicon atom oxygen atom (a) Describe one similarity in the structures of diamond and silicon dioxide. (b) Explain why silicon dioxide has a high melting point. (c) …
- Question 8
B8 Chlorine reacts with sodium hydroxide. Cl 2(g) + 2NaOH(aq) NaCl (aq) + NaClO(aq) …
- Question 9
B9 When rubber is heated in the absence of air, a small amount of isoprene is formed. The structure of isoprene is shown. …
- Question 10
B10 At 200 °C and 200 atmospheres pressure, phosphorus(V) chloride forms an equilibrium mixture with phosphorus(III) chloride and chlorine. PCl 5(g) PCl 3(g) + Cl 2(g) phosphorus(V) phosphorus(III) chloride chloride (a) Predict and explain the effect of decreasing the pressure …
Other Chemistry papers from Oct/Nov 2015
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/21 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical