Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/21 May/June 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 1, 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_21 · 0620_s20_ms_21
Topics in this paper
Which syllabus chapters 0620/21 May/June 2020 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/21 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 should be used to measure exactly 21.4 cm3 of water? A 25 cm3 beaker B 25 cm3 pipette C 50 cm3 burette D 50 cm3 measuring cylinder
- Question 3
The chromatogram for an unknown dye is shown. 12 cm 15 cm 2 cm 9 cm solvent front What is the Rf value of the dye? …
- Question 4
The atomic number and nucleon number of a potassium atom are shown. potassium atom atomic number 19 nucleon number 39 How many protons, neutrons and electrons are in a potassium ion, K+? protons neutrons electrons …
- Question 5
The electronic structures of two atoms, P and Q, are shown. …
- Question 6
Which row contains a description of metallic bonding and a property that is explained by reference to metallic bonding? description of metallic bonding property explained by metallic bonding A a lattice of negative ions in a sea of electrons a …
- Question 7
Which statement explains why methane has a lower boiling point than water? A Methane has weaker covalent bonds than water. B Methane has weaker attractive forces than water. C Methane molecules are heavier than water molecules. D Methane molecules have …
- Question 8
A solution of iron(III) sulfate reacts with aqueous sodium hydroxide to form a red–brown precipitate. What is the balanced equation, including state symbols, for the reaction? A FeSO4(aq) + 2NaOH(aq) → Fe(OH)2(s) + Na2SO4(aq) B FeSO4(l) + 2NaOH(l) → Fe(OH)2(s) …
- Question 9
The Haber process is a reversible reaction. …
- Question 10
Dilute aqueous sodium chloride is electrolysed using platinum electrodes. What is the half-equation for the reaction at the cathode? …
- 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
The equation for the complete combustion of methane gas is shown. CH4(g) …
- 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
Which diagram represents a chemical change? …
- Question 15
The rate of reaction between calcium carbonate chips and hydrochloric acid is studied by collecting the volume of gas released in one minute at different temperatures. A graph of rate of reaction against temperature is shown. …
- Question 16
The equation shows the equilibrium between dinitrogen tetroxide, N2O4, and nitrogen dioxide, NO2. The colours of the reactant and product are also shown. N2O4(g) 2NO2(g) colourless brown The forward reaction is endothermic. Which statement is not correct? A At equilibrium …
- Question 17
The equations for two reactions of iodide ions are shown. reaction 1 2I–(aq) + H2O2(aq) → I2(aq) + 2OH–(aq) reaction 2 I–(aq) + Ag+(aq) → AgI(s) Which statement is correct? A Both reactions are redox reactions. B Neither reaction is …
- 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
Lead(II) sulfate is an insoluble salt. Which method is suitable for obtaining solid lead(II) sulfate? A Mix aqueous lead(II) nitrate and aqueous potassium sulfate, heat to evaporate all of the water, collect the solid and then wash and dry it. …
- Question 22
A Group I metal (lithium, sodium or potassium) is reacted with a Group VII element (chlorine, bromine or iodine). Which compound is formed when the Group I metal of highest density reacts with the Group VII element of lowest density? …
- 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
A balloon is filled with helium. Helium is a noble gas and makes the balloon rise up in the air. The density of air is …
- 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
Sodium nitrate is a white crystalline solid that decomposes on heating. heat sodium nitrate Which row describes the decomposition products formed when sodium nitrate is heated strongly? solid products gaseous products A sodium nitrite NO2 and O2 B sodium nitrite …
- 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
Element Y reacts with copper(II) oxide to form copper. Element Y will not react with zinc oxide. Copper has no reaction with zinc oxide. What is the order of reactivity of these three elements, most reactive first? A Cu …
- Question 29
Which statement shows that a liquid is pure water? A It boils at …
- Question 30
Which process removes carbon dioxide from the atmosphere? A combustion B decomposition C photosynthesis D respiration
- Question 31
Ammonia is manufactured by the Haber process. …
- Question 32
Coating iron helps to prevent rusting. Which coating will continue to protect the iron even when the coating is damaged? A copper B paint C plastic 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
The Contact process is used to manufacture concentrated sulfuric acid and consists of four steps. Which step involves a catalyst? A production of sulfur dioxide gas B production of sulfur trioxide gas C production of oleum D production of concentrated …
- Question 35
Which row about the production of ethanol by fermentation is correct? raw materials energy requirement rate of reaction A non-renewable high slow B renewable low slow C non-renewable low fast D renewable high fast
- Question 36
Which statement about homologous series is correct? A Members of a homologous series have the same structural formula. B Members of a homologous series all have similar chemical properties. C Members of a homologous series all have similar physical 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
Some properties of an organic compound J are listed. ● It is a liquid at room temperature. ● It is soluble in water. ● A solution of J reacts with calcium carbonate to form carbon dioxide. ● A solution of …
- Question 39
Ethane, C2H6, reacts with chlorine in a substitution reaction. What are the products of this reaction? A chloroethane and hydrogen B chloroethane and hydrogen chloride C chloroethene and hydrogen D chloroethene and hydrogen chloride
- Question 40
Which polymers or types of polymer are synthetic? 1 carbohydrates 2 nylon 3 proteins 4 Terylene A 1 and …
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