Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/21 May/June 2011 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2011: the question paper and its official mark scheme, 9 questions worth 85 marks. Free to open, no account needed.
- Questions
- 9
- Marks
- 85
File names: 5070_s11_qp_21 · 5070_s11_ms_21
Topics in this paper
Which syllabus chapters 5070/21 May/June 2011 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Electrochemistry | 2 | 17 |
| Stoichiometry | 2 | 17 |
| Chemical reactions | 1 | 11 |
| Chemistry of the environment | 1 | 10 |
| Organic chemistry | 1 | 10 |
| Chemical energetics | 1 | 10 |
| Acids, bases and salts | 1 | 10 |
Questions in 5070/21 May/June 2011
- Question 1
A1 Choose from the following formulae to answer the questions below. AgI C2F3Cl3 CH4 C3H6 C6H6 CuCl2 K2Cr2O7 KI MnO2 (NH4)2SO4 V2O5 ZnSO4 Each formula can be used once, more than once, or not at all. Which is the formula …
- Question 2
For Examiner’s Use A2 Small pieces of copper were added to excess concentrated sulfuric acid and the mixture heated for 30 minutes. A colourless gas Z was formed. When Z was tested with filter paper dipped into acidified potassium dichromate(VI), …
- Question 3
For Examiner’s Use A3 Uranium is a radioactive metal. It has two main isotopes, uranium-235 with a nucleon number of 235 and uranium-238 with a nucleon number of …
- Question 4
For Examiner’s Use A4 Hydrogen peroxide, H2O2, is a covalent compound. Hydrogen peroxide decomposes to form water and oxygen. …
- Question 5
For Examiner’s Use A5 Clean, dry air contains a mixture of gases including oxygen, nitrogen, carbon dioxide and the noble gases. (a) Give the percentage by volume of nitrogen in clean, dry air. (b) State and explain how oxygen is …
- Question 6
B6 Electrolysis involves the chemical decomposition of a compound, either when molten or in aqueous solution, by the passage of an electric current. (a) Explain why aqueous calcium nitrate can be electrolysed but liquid pentane cannot. (b) State the products …
- Question 7
For Examiner’s Use B7 Alcohols are a homologous series of organic compounds. The table shows some information about the first five alcohols. name molecular formula methanol CH4O ethanol C2H6O C3H8O butanol C4H10O pentanol C5H12O (a) Suggest the name of the …
- Question 8
For Examiner’s Use B8 Ethanoic acid is manufactured by a reaction between methanol, CH3OH, and carbon monoxide. CH3OH + CO CH3COOH …
- Question 9
For Examiner’s Use B9 Sulfamic acid, SO3NH3, is a weak acid used to remove limescale from kettles. (a) Explain the meaning of the term weak acid ? (b) The pH of an aqueous solution of sulfamic acid can be determined …
Other Chemistry papers from May/June 2011
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical