Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/21 Oct/Nov 2015 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, 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_21 · 5070_w15_ms_21
Grade thresholds for 5070/21 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 | 34 | 22 | 17 | 12 |
Topics in this paper
Which syllabus chapters 5070/21 Oct/Nov 2015 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/21 Oct/Nov 2015
- Question 1
A1 Choose from the following gases to answer the questions below. ammonia argon carbon dioxide chlorine ethane ethene nitrogen nitrogen(II) oxide oxygen sulfur dioxide Each of these gases can be used once, more than once or not at all. Which …
- Question 2
A2 Coal is a mixture of carbon compounds with a small amount of sulfur. A sample of coal is heated in the absence of air using the apparatus shown. powdered coal heat colourless liquid water tar The distillate is a …
- Question 3
A3 A layer of ozone is present in the stratosphere about 30 km above the Earth’s surface. (a) Compounds with formulae such as CCl 3F and C2Cl F5 are responsible for the depletion of ozone. (i) Give the general name …
- Question 4
A4 Copper is a metal. (a) Draw a labelled diagram to show the bonding in copper. (b) Explain why metals are malleable. (c) Copper corrodes slowly in damp air. One of the corrosion products has the formula CuCO3.Cu(OH)2. (i) Calculate …
- Question 5
A5 A student set up a tube as shown in the diagram. cotton wool soaked in hydrobromic acid X cotton wool soaked in aqueous ammonia Concentrated hydrobromic acid produces fumes of hydrogen bromide. Concentrated aqueous ammonia produces fumes of ammonia. …
- Question 6
A6 When 1 mole of sodium hydroxide reacts with excess hydrochloric acid, 57.1 kJ of energy is released. NaOH + HCl NaCl …
- Question 7
B7 The structures of graphite and boron nitride are shown below. = carbon atom Key nitrogen atom boron atom Key graphite boron nitride (a) Like graphite, boron nitride feels slippery to the touch. Explain, in terms of structure and bonding, …
- Question 8
B8 A sample of 0.030 g of small pieces of magnesium is added to 20 cm3 of 0.10 mol / dm3 hydrochloric acid. Mg(s) + 2HCl (aq) MgCl 2(aq) …
- Question 9
B9 The structure of glycolic acid can be represented as shown. …
- Question 10
B10 Methanol is manufactured by reacting carbon monoxide with hydrogen. The forward reaction is exothermic. CO(g) + 2H2(g) CH3OH(g) …
Other Chemistry papers from Oct/Nov 2015
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical