Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 May/June 2020 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, May/June 2020: the question paper and its official mark scheme, 40 questions worth 40 marks. Free to open, no account needed.
- Questions
- 40
- Marks
- 40
File names: 5070_s20_qp_12 · 5070_s20_ms_12
Topics in this paper
Which syllabus chapters 5070/12 May/June 2020 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 May/June 2020
- Question 1
The diagram shows four pieces of apparatus that are used to measure the volume of a gas or liquid. Which piece of apparatus should always be filled to the same level? A burette B gas syringe C measuring cylinder D …
- Question 2
Aqueous sodium thiosulfate reacts with acid to make a precipitate of sulfur. Na2S2O3(aq) + 2HCl (aq) → 2NaCl (aq) …
- Question 3
A paper chromatography experiment is carried out to find an Rf value for Fe3+(aq). The result is shown. solvent front starting line y x Fe3+ To make the spot containing Fe3+(aq) more visible, the paper is sprayed with aqueous sodium …
- Question 4
The diagram shows two experiments. Al 3+(aq) add a few drops of NaOH(aq) add an excess of NaOH(aq) Cu2+(aq) add a few drops of NaOH(aq) experiment 1 experiment 2 no precipitate no precipitate precipitate formed precipitate formed add an excess …
- Question 5
Which methods of separation require a change of state from liquid to gas? 1 paper chromatography 2 crystallisation 3 distillation 4 filtration A 1 and …
- Question 6
Hydrogen sulfide, H2S, and hydrogen chloride, HCl, are both gases at temperatures above –50 °C. Which gas will diffuse most rapidly at the temperature given? A hydrogen chloride at …
- Question 7
The diagram shows the relative mass and the relative charge of two particles, and , present in atoms and ions. …
- Question 8
Which ion has the most shells that contain electrons? A Al 3+ B Be2+ …
- Question 9
Which substance conducts electricity both when solid and when molten? A an alloy B a hydrocarbon C a metal oxide D a salt
- Question 10
When they react together, which pair of elements form an ionic compound? A carbon and hydrogen B hydrogen and chlorine C lithium and oxygen D sulfur and oxygen
- Question 11
How many shared electrons are in one carbon dioxide molecule? …
- Question 12
Element X has a lattice of positive ions and a ‘sea of electrons’. …
- Question 13
Which row shows the correct state symbols for the reaction between calcium carbonate and dilute hydrochloric acid? (The conditions are room temperature and pressure.) CaCO3 + 2HCl → CaCl …
- Question 14
The expression shown for the value of Ar for fluorine is incomplete. Ar (fluorine) …
- Question 15
A mixture of 5 cm3 of CH4 and 100 cm3 of air is exploded. Assume air is 80% N2 by volume and 20% O2 by volume. The resulting mixture is cooled. All volumes are measured at room temperature and pressure. …
- Question 16
Which arrangement is used to electroplate copper onto a steel key? electrolyte anode (positive electrode) cathode (negative electrode) A aqueous copper(II) sulfate piece of pure copper steel key B aqueous copper(II) sulfate steel key piece of pure copper C dilute …
- Question 17
The chloride of metal X is dissolved in water. A concentrated solution of this chloride is electrolysed using inert electrodes. inert anode inert cathode concentrated aqueous solution of chloride of metal X X is above sodium in the reactivity series. …
- Question 18
Which change in conditions, for the reaction between zinc and dilute sulfuric acid, increases the rate of reaction by lowering the activation energy? A adding a catalyst B increasing the concentration of the acid C increasing the surface area of …
- Question 19
Many reactions can be classified as redox reactions. Which equations show redox reactions? 1 Mg + 2HCl → MgCl …
- Question 20
Which row correctly shows whether the hydrogen ion concentration and the pH of ethanoic acid are higher or lower than those of hydrochloric acid of the same concentration? hydrogen ion concentration pH A higher higher B higher lower C lower …
- Question 21
Which aqueous reagent liberates ammonia from ammonium nitrate on warming? A calcium nitrate B potassium hydroxide C sodium chloride D sulfuric acid
- Question 22
Two fertilisers are made by mixing chemical compounds. Fertiliser X contains 500 g of NH4NO3 and 500 g of (NH4)2SO4 per kilogram. Fertiliser Y contains 700 g of NH4NO3 and 300 g of CaSO4 per kilogram. Which fertiliser contains the …
- Question 23
Which processes occur in the manufacture of sulfuric acid? 1 burning sulfur in air 2 dissolving sulfur dioxide in sulfuric acid 3 dissolving sulfur dioxide in water 4 reacting sulfur dioxide with air A 1 and …
- Question 24
A lump of element X can be cut by a knife. During its reaction with water, X floats and melts. What is X? A calcium B copper C magnesium D potassium
- Question 25
Chlorine is passed into separate samples of aqueous potassium iodide and aqueous potassium bromide. In which solutions is there a colour change? KI(aq) KBr(aq) …
- Question 26
Which diagram shows the structure of an alloy? …
- Question 27
Which element can only be extracted from its ore using electrolysis? A calcium B copper C lead D silver
- Question 28
Which equation shows a thermal decomposition that occurs in the blast furnace? …
- Question 29
Which diagram correctly shows the conditions necessary for the rusting of iron and also the metal that can be used to prevent rusting by sacrificial protection? O2 only copper iron A O2 only magnesium iron …
- Question 30
Aluminium is produced by the electrolysis of pure aluminium oxide. One of the electrodes in the process has to be replaced often. Which statement is correct? A The product at the anode reacts with the anode. B The product at …
- Question 31
Which row correctly compares carbon dioxide and methane? both contain carbon both are described as a greenhouse gas both lower the pH of water when they dissolve in it …
- Question 32
Sea water has to be purified in order to obtain drinking water from it. Which processes are used to purify the sea water? fractional distillation desalination …
- Question 33
Which structure represents an isomer of butane? …
- Question 34
Which statement about the organic compounds CH4, C2H4, C2H6 and C3H8 is correct? A Only C2H4 and C2H6 decolourise bromine water. B They are all saturated compounds. C They are all unsaturated compounds. D They are all hydrocarbons.
- Question 35
The alkenes are a homologous series. Which statement about alkenes is correct? A An alkene molecule contains four fewer hydrogen atoms than an alkane molecule with the same number of carbon atoms. B If a food is described as polyunsaturated …
- Question 36
Which organic compound is used as a solvent, a renewable fuel and in the production of vinegar? A ethanoic acid B ethanol C propanoic acid D propanol
- Question 37
Which structure shows the carboxylic acid with the lowest relative molecular mass? …
- Question 38
What is the name of the ester shown? …
- Question 39
The diagram shows the structure of a monomer. …
- Question 40
Which statement about polymers is correct? A Nylon and Terylene are produced by addition polymerisation. B Nylon and Terylene both contain amide linkages. C Simple sugars are produced by hydrolysing proteins. D Starch contains the elements carbon, hydrogen and oxygen. …
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