Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/21 May/June 2014 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2014: 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
- 52
File names: 5070_s14_qp_21 · 5070_s14_ms_21
Grade thresholds for 5070/21 May/June 2014
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 |
|---|---|---|---|---|
| 52 | 36 | 24 | 18 | 12 |
Topics in this paper
Which syllabus chapters 5070/21 May/June 2014 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Chemistry of the environment | 2 | 21 |
| Acids, bases and salts | 2 | 15 |
| Organic chemistry | 2 | 15 |
| Electrochemistry | 1 | 10 |
| The Periodic Table | 1 | 10 |
| Stoichiometry | 1 | 8 |
| Experimental techniques and chemical analysis | 1 | 6 |
Questions in 5070/21 May/June 2014
- Question 1
A1 Choose from the following equations to answer the questions below. …
- Question 2
A2 A power station burns methane, CH4, which is contaminated by hydrogen sulfide, H2S. The equation shows the combustion of methane. CH4(g) + 2O2(g) CO2(g) + 2H2O(g) The combustion of the hydrogen sulfide forms water and sulfur dioxide. (a) Construct …
- Question 3
A3 Zinc carbonate thermally decomposes to form zinc oxide and carbon dioxide. ZnCO3(s) ZnO(s) + CO2(g) In an experiment, a sample of zinc carbonate is heated in a test-tube using a Bunsen burner. The total volume of carbon dioxide formed …
- Question 4
A4 Aluminium is manufactured by the electrolysis of aluminium oxide dissolved in molten cryolite. (a) Give the equations for the reactions that occur at the electrodes during this electrolysis. positive electrode negative electrode (b) Aluminium is a useful metal as …
- Question 5
A5 Ethene has the formula C2H4. (a) Draw a ‘dot-and-cross’ diagram to show the bonding in a molecule of ethene. Draw only the outer shell electrons. (b) Describe the manufacture of pure ethanol starting from ethene. Include an equation and …
- Question 6
A6 The flow chart shows some reactions of the compounds of a metal. metal carbonate A colourless gas B light blue precipitate D colourless solution of E pink solid F blue solution of C H2SO4(aq) excess NaOH(aq) excess Mg(s) Identify, …
- Question 7
B7 Cyclobutane has the following structure. …
- Question 8
B8 Butanoic acid, CH3CH2CH2CO2H, and ethanoic acid, CH3CO2H, are both weak acids. (a) Explain, with the aid of an equation, what is meant by the term weak acid. (b) Butanoic acid reacts with magnesium. Name the gas formed and describe …
- Question 9
B9 When carbon dioxide reacts with hydrogen in a sealed container, an equilibrium mixture is obtained. CO2(g) + 4H2(g) CH4(g) …
- Question 10
B10 Francium, Fr, is a highly reactive element in Group I of the Periodic Table. The table shows some information about two isotopes of francium. atomic symbol number of protons number of electrons number of neutrons 223 87 Fr …
Other Chemistry papers from May/June 2014
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical