Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/23 May/June 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 3, 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: 0620_s20_qp_23 · 0620_s20_ms_23
Topics in this paper
Which syllabus chapters 0620/23 May/June 2020 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/23 May/June 2020
- Question 1
A mixture of ice and water is left to stand and the ice melts. Which row describes what happens as the ice is melting? temperature of mixture energy changes A increases average kinetic energy of particles increases B increases energy …
- Question 2
Which piece of apparatus is used to measure 13.7 cm3 of dilute hydrochloric acid? A balance B burette C conical flask D pipette
- Question 3
Chromatography is carried out on a mixture of three substances. The chromatogram is sprayed with a locating agent. The result is shown. solvent front baseline What are possible reasons why the chromatogram shows only two spots? 1 One of the …
- Question 4
The structure of an atom of element X is shown. 5p 6n key = electron = neutron = proton n p What is element X? A boron B carbon C sodium D sulfur
- Question 5
The electronic structures of two atoms, P and Q, are shown. …
- Question 6
Caesium is a metal in Group I of the Periodic Table. Which description of the bonding in caesium is correct? A electrostatic attraction between oppositely charged ions B electrostatic attraction between positive metal ions and mobile electrons C neighbouring metal …
- Question 7
Why does magnesium oxide, MgO, have a very high melting point? A There is a very strong double bond between magnesium and oxygen. B There is a very strong attractive force between the magnesium oxide molecules. C The oxide ions …
- Question 8
Aluminium metal reacts with iron(III) oxide to form aluminium oxide and iron. Which chemical equation for the reaction between aluminium and iron(III) oxide is correct? A FeO + Al → Al O + Fe B Fe2O + 2Al → Al …
- Question 9
The Haber process is a reversible reaction. …
- Question 10
Which row describes the reactions during the electrolysis of dilute aqueous sodium chloride? anode (+) reaction cathode (–) reaction …
- Question 11
The electrolysis of aqueous copper(II) sulfate, using inert electrodes, is shown. aqueous copper(II) sulfate + – Which statement about a reaction at an electrode is correct? A Copper ions gain electrons at the negative electrode. B Copper ions gain electrons …
- Question 12
Ethene gas, C2H4, is completely burned in excess oxygen to form carbon dioxide and water. The equation for this exothermic reaction is shown. …
- Question 13
Which statements about hydrogen fuel cells are correct? 1 Water is formed as the only waste product. 2 Both water and carbon dioxide are formed as waste products. 3 The overall reaction is …
- Question 14
In which tube is a physical change taking place? A water iron nail B water sodium chloride C dilute hydrochloric acid dilute hydrochloric acid D calcium carbonate magnesium
- Question 15
A chemical reaction occurs when the reacting particles collide. Which reaction conditions would produce the greatest rate of particle collisions? concentration of acid reaction temperature A decrease decrease B no change increase C increase increase D increase no change
- Question 16
At room temperature, the conversion of nitrogen dioxide, NO2, into dinitrogen tetroxide, N2O4, is reversible. 2NO2(g) N2O4(g) brown colourless gas gas The forward reaction is exothermic. Which changes cause the equilibrium to shift to the left? pressure temperature A decrease …
- Question 17
The equation for the reaction between zinc and aqueous copper(II) sulfate is shown. Zn + CuSO4 → ZnSO4 + Cu Which statement is correct? A The oxidation state of the oxidising agent has changed from 0 to +2. B The …
- Question 18
The graph shows how the pH of a solution changes as an acid is added to an alkali. acid + alkali → salt + water Which letter represents the area of the graph where both acid and salt are present? …
- Question 19
Which statement describes a weak acid? A It is a proton acceptor and is fully ionised in aqueous solution. B It is a proton acceptor and is partially ionised in aqueous solution. C It is a proton donor and is …
- Question 20
The apparatus shown is used to prepare aqueous copper(II) sulfate. Y solid X aqueous copper(II) sulfate excess of solid X filter paper heat stirrer What are X and …
- Question 21
Which two compounds would react together to form the insoluble salt lead(II) chloride? compound solubility in water 1 lead(II) nitrate yes 2 lead(II) sulfate no 3 silver chloride no 4 sodium chloride yes A 1 and …
- Question 22
The elements in Group I include lithium, sodium and potassium. Which statements about these elements are correct? 1 Sodium is denser than lithium. 2 Lithium has a lower melting point than potassium. 3 Potassium is a relatively soft metal. 4 …
- Question 23
The properties of the element titanium, Ti, can be predicted from its position in the Periodic Table. Which row identifies the properties of titanium? can be used as a catalyst conducts electricity when solid has low density forms coloured compounds …
- Question 24
Which statement about the noble gases is correct? A Argon is used in light bulbs and balloons. B Helium reacts with oxygen in the air. C They all have full outer electron shells. D They are all diatomic molecules.
- Question 25
Which property is shown by all metals? A They are extracted from their ores by heating with carbon. B They conduct electricity. C They form acidic oxides. D They react with hydrochloric acid to form hydrogen.
- Question 26
A salt is heated strongly. The only products are a white solid and a colourless gas. What is the salt? A copper(II) carbonate B potassium carbonate C calcium nitrate D sodium nitrate
- Question 27
Molten iron from the blast furnace contains impurities. The process of turning the impure iron into steel involves blowing oxygen into the molten iron and adding calcium oxide. What are the reasons for blowing in oxygen and adding calcium oxide? …
- Question 28
P, Q, R and S are four metals. P displaces Q from a solution of its sulfate. Q reacts with hydrochloric acid and can be extracted from its ore using carbon. R does not react with hydrochloric acid. The carbonate …
- Question 29
Which substances can be used to detect the presence of water? 1 cobalt(II) chloride 2 copper(II) sulfate 3 litmus 4 methyl orange A 1 and …
- Question 30
Which processes increase the amount of carbon dioxide in the atmosphere? 1 burning ethanol 2 farming cattle 3 growing trees …
- Question 31
Hydrogen and nitrogen react to form ammonia in the Haber process. …
- Question 32
The diagram shows the positions of sacrificial anodes on the steel hull of a yacht. anodes Which metal is used to make the anodes? A calcium B copper C sodium D zinc
- Question 33
A student suggests three uses of calcium carbonate (limestone). 1 manufacture of cement 2 manufacture of iron 3 treating alkaline soils Which suggestions are correct? A 1 and 2 only B 1 and 3 only C 2 and 3 only …
- Question 34
Which reaction in the Contact process is catalysed by vanadium(V) oxide? …
- Question 35
Ethanol is produced by: 1 the catalytic addition of steam to ethene 2 fermentation. Which statement is correct? A Both processes require similar amounts of energy. B Both processes use a catalyst. C Process 1 uses a renewable resource. D …
- Question 36
Which statement about a homologous series is correct? A All members have the same general formula. B All members have the same molecular formula. C All members have similar physical properties. D Members show a trend in their chemical properties.
- Question 37
Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns. What is the correct order? less energy released more energy released A ethene ethane methane B ethene methane ethane C …
- Question 38
A small quantity of a solid chemical is added to a large excess of aqueous ethanoic acid. No bubbles of gas are seen and the solid dissolves to give a colourless solution. What was the solid chemical? A calcium hydroxide …
- Question 39
Alkanes undergo substitution reactions with chlorine in the presence of ultraviolet light. Which equation shows a reaction of this type? …
- Question 40
Which statement about carbohydrates and proteins is correct? A Carbohydrates and proteins are constituents of food. B Carbohydrates and proteins are natural polymers used to make larger molecules called monomers. C Carbohydrates and proteins are synthetic polymers. D Carbohydrates and …
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