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2013

Cambridge O Level · 5070 · Paper 2 · Theory

Chemistry 5070/21 Oct/Nov 2013 past paper

Cambridge O Level Chemistry (5070) Paper 2 (Theory), variant 1, Oct/Nov 2013: the question paper and its official mark scheme, 9 questions worth 85 marks. Free to open, no account needed.

Questions
9
Marks
85
Open the question paperMark scheme

File names: 5070_w13_qp_21 · 5070_w13_ms_21

Topics in this paper

Which syllabus chapters 5070/21 Oct/Nov 2013 tested, by marks. Each chapter links to every past-paper question on it.

ChapterQuestionsMarks
Acids, bases and salts220
Chemistry of the environment216
Atoms, elements and compounds111
Organic chemistry110
Metals110
Stoichiometry110
Chemical reactions18

Questions in 5070/21 Oct/Nov 2013

  1. Question 1Chemistry of the environment · 6 marks

    A1 Choose from the following compounds to answer the questions below. calcium oxide carbon dioxide carbon monoxide copper(II) sulfate ethanol ethene iron(II) chloride iron(III) chloride nitrogen dioxide silver chloride silver iodide sulfur dioxide Each compound can be used once, more …

  2. Question 2Organic chemistry · 10 marks

    For Examiner’s Use A2 Alkenes are a homologous series of unsaturated hydrocarbons. (a) Give the general formula of alkenes. (b) In addition to having a general formula, state two other characteristics of a homologous series. …

  3. Question 3Atoms, elements and compounds · 11 marks

    For Examiner’s Use A3 Calcium, proton number 20, is an element in Group II of the Periodic Table. (a) Give the electronic configuration for calcium. (b) Calcium has six naturally-occurring isotopes. (i) State the meaning of the term isotopes. (ii) …

  4. Question 4Chemistry of the environment · 10 marks

    For Examiner’s Use A4 Nitrogen and oxygen are present in dry air. (a) What is the percentage composition by volume of each of these gases in dry air? nitrogen oxygen (b) What method is used to separate these gases from …

  5. Question 5Chemical reactions · 8 marks

    A5 Hydrogen peroxide, H2O2, is a colourless liquid. (a) Calculate the percentage by mass of oxygen in hydrogen peroxide. % (b) The enzyme catalase is present in yeast. The enzyme catalyses the decomposition of aqueous hydrogen peroxide. 2H2O2(aq) …

  6. Question 6Metals · 10 marks

    B6 Iron is extracted from its ore (haematite, Fe2O3) in a blast furnace. Coke (carbon) and limestone (calcium carbonate) are also added to the furnace. (a) Describe the essential reactions taking place in the blast furnace. (b) Steel is an …

  7. Question 7Stoichiometry · 10 marks

    For Examiner’s Use B7 (a) A compound of carbon, hydrogen and chlorine contains 0.48 g of carbon, 0.08 g of hydrogen and 1.42 g of chlorine. (i) Deduce the empirical formula of this compound. (ii) The relative molecular mass of …

  8. Question 8Acids, bases and salts · 10 marks

    For Examiner’s Use B8 Zinc sulfide is a compound that can be made by heating zinc powder with sulfur powder. (a) Describe two differences between a mixture of zinc and sulfur and a compound of zinc and sulfur. …

  9. Question 9Acids, bases and salts · 10 marks

    For Examiner’s Use B9 Ethanoic acid reacts with sodium hydroxide to form water and a salt. (a) Give the formula of the salt. (b) The reaction between ethanoic acid and sodium hydroxide is described as a neutralisation reaction. Write the …

Other Chemistry papers from Oct/Nov 2013

Questions students ask

Where can I get the 5070/21 Oct/Nov 2013 mark scheme?
Open the mark scheme above - it is the official Cambridge scheme for this exact paper (5070_w13_ms_21), and on a wide screen it sits beside the question you are reading.
Which topics came up in 5070/21 Oct/Nov 2013?
Mostly Acids, bases and salts, Chemistry of the environment, Atoms, elements and compounds. The full list is in the table above.
Do I need an account to open 5070/21 Oct/Nov 2013?
No. Every paper opens for free without signing in. A free account also saves your pen marks and records your score against the grade thresholds.