Cambridge O Level · 5070 · Paper 2 · Theory
Chemistry 5070/21 May/June 2012 past paper
Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, May/June 2012: 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_s12_qp_21 · 5070_s12_ms_21
Topics in this paper
Which syllabus chapters 5070/21 May/June 2012 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Stoichiometry | 2 | 18 |
| Atoms, elements and compounds | 1 | 11 |
| Acids, bases and salts | 1 | 10 |
| Organic chemistry | 1 | 10 |
| Electrochemistry | 1 | 10 |
| Chemical reactions | 1 | 10 |
| Metals | 1 | 9 |
| Chemistry of the environment | 1 | 7 |
Questions in 5070/21 May/June 2012
- Question 1
A1 Choose from the following gases to answer the questions below. ammonia carbon monoxide chlorine ethane fluorine methane neon nitrogen nitrogen monoxide oxygen propane propene sulfur dioxide sulfur trioxide Each gas can be used once, more than once or not …
- Question 2
For Examiner’s Use A2 Iron(II) sulfate crystals decompose when heated to give three gases U, V and W and an orange-brown solid T. • Gas U was tested with filter paper soaked with acidified potassium dichromate(VI). The filter paper changed …
- Question 3
For Examiner’s Use A3 Iodine forms a diatomic molecule, I2. It has a simple molecular structure. The diagram shows the structure of the simple molecular lattice of iodine. Each iodine molecule is held in place by weak intermolecular forces. Within …
- Question 4
For Examiner’s Use A4 This question is about some Group II elements and their compounds. Magnesium reacts with oxygen to form magnesium oxide. (a) The table shows information about the ions in magnesium oxide. (i) Complete the table. ion electron …
- Question 5
For Examiner’s Use A5 Displacement reactions occur when a metal reacts with a metal compound. The table shows the results of some displacement reactions. In each case a sample of powdered metal is added to an aqueous metal sulfate. aqueous …
- Question 6
B6 Seawater contains many dissolved ions. The table shows the concentration of some of these ions in a typical sample of seawater. ion formula concentration …
- Question 7
For Examiner’s Use B7 Carboxylic acids are a homologous series of organic compounds. The table shows some information about the first five carboxylic acids. name molecular formula melting point / °C boiling point / °C methanoic acid CH2O2 8 101 …
- Question 8
For Examiner’s Use B8 Solid sodium hydroxide, NaOH, has a giant ionic structure. (a) How many electrons are there in one hydroxide ion? (b) Explain why solid sodium hydroxide cannot be electrolysed but aqueous sodium hydroxide can be electrolysed. (c) …
- Question 9
For Examiner’s Use B9 Hydrogen has many industrial uses. One possible way to manufacture hydrogen involves the reversible reaction between methane and steam. CH4(g) + H2O(g) CO(g) …
Other Chemistry papers from May/June 2012
- 5070/11 Multiple choice
- 5070/12 Multiple choice
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical