IGCSE Chemistry (0620) — May–June 2024, Paper 13
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which two processes are required to change ice into steam? A boiling and melting B boiling and freezing C condensing and melting D condensing and freezing
Answer this question and get it marked →Which row describes how the volume of a gas changes when the temperature increases, or when the pressure increases? (columns: temperature increases; pressure increases) A volume…
Answer this question and get it marked →Four substances in a mixture are listed: calcium nitrate; iron(II) sulfate; oxygen; water. Which statement describes the mixture? A It contains 6 elements. B It contains 3…
Answer this question and get it marked →An ion is represented by the symbol shown (an oxide ion ¹⁸O²⁻, mass number 18, atomic number 8, charge 2-). Which statements about this ion are correct? 1 The ion contains 8…
Answer this question and get it marked →What is the meaning of the term nucleon number? A the number of neutrons in the nucleus of an atom B the number of protons in the nucleus of an atom C the total number of protons…
Answer this question and get it marked →Which row describes the electrical conductivity of covalent and ionic compounds when solid and when molten (✓ = good conductivity, ✗ = poor conductivity)? (columns: covalent…
Answer this question and get it marked →Which statement about the bonding in sodium chloride is correct? A The sodium and chlorine atoms share pairs of electrons. B The chlorine atoms give electrons to the sodium atoms…
Answer this question and get it marked →The diagram shows the arrangement of carbon atoms in a giant covalent structure (each carbon atom bonded to four others in a tetrahedral lattice). Which row identifies the…
Answer this question and get it marked →Which statement is the correct definition for molecular formula? A an atom or group of atoms that determine the chemical properties of a compound B a structure which shows all the…
Answer this question and get it marked →A compound, T, has the formula CH3Cl. Three statements about this compound are listed: 1 A molecule of the compound contains five atoms. 2 A molecule of the compound contains five…
Answer this question and get it marked →Iron water taps are often electroplated with a layer of chromium. Which statements explain why iron water taps are electroplated? 1 It improves the appearance of the taps. 2 It…
Answer this question and get it marked →Molten caesium bromide is electrolysed using inert electrodes. Which row identifies the product at each electrode? (columns: anode; cathode) A bromine; caesium B caesium; bromine…
Answer this question and get it marked →Which equation represents the overall reaction in a hydrogen-oxygen fuel cell? A 4H + O2 → 2H2O B 2H2 + O2 → 2H2O C H2 + O2 → H2O D 2H + O → H2O
Answer this question and get it marked →Which statements about endothermic reactions are correct? 1 The energy of the products is greater than the energy of the reactants. 2 The energy of the reactants is greater than…
Answer this question and get it marked →Which process is a physical change? A firework exploding B burning wood C chocolate melting D iron rusting
Answer this question and get it marked →Magnesium reacts with dilute hydrochloric acid, HCl, to produce hydrogen gas. Which row identifies the reaction conditions that give the fastest rate of reaction? (columns:…
Answer this question and get it marked →Which reaction produces a white-coloured substance? A adding water to anhydrous cobalt(II) chloride B adding water to anhydrous copper(II) sulfate C heating hydrated cobalt(II)…
Answer this question and get it marked →In a blast furnace, iron is extracted when iron(III) oxide reacts with carbon monoxide: Fe2O3 + 3CO → 2Fe + 3CO2 Which substance is oxidised and which is reduced in this reaction?…
Answer this question and get it marked →Which row shows the colours of litmus and methyl orange with solutions of acids or bases? (columns: solution; litmus; methyl orange) A acid; red; red B acid; blue; yellow C base;…
Answer this question and get it marked →Aqueous sodium hydroxide is reacted with excess dilute hydrochloric acid. Which ion causes the resulting mixture to be acidic? A Na⁺ B H⁺ C OH⁻ D Cl⁻
Answer this question and get it marked →Universal indicator is added to an aqueous solution of oxide X. The indicator changes colour from green to red. What is X? A MgO B CaO C K2O D NO2
Answer this question and get it marked →Which rows identify two aqueous salts which react together to produce a precipitate? (salt 1; salt 2): 1 sodium sulfate; barium nitrate 2 sodium chloride; barium sulfate 3 barium…
Answer this question and get it marked →Which statements about elements in the Periodic Table are correct? 1 Elements in the same group have the same number of electrons in their outer shell. 2 Elements in the same…
Answer this question and get it marked →Four mixtures each contain a halogen and an aqueous sodium halide. Which row describes what happens in the mixtures shown? (columns: mixture; description) A iodine + sodium…
Answer this question and get it marked →Which row describes a transition element? (columns: density in g/cm³; colour of chloride) A 0.98; green B 0.98; white C 8.90; green D 8.90; white
Answer this question and get it marked →Which statement about the use of metals is correct? A Aluminium has a high strength and high density so is used to make aircraft. B Copper has a low melting point so is used in…
Answer this question and get it marked →Which statements explain why stainless steel is used in cutlery? 1 It is resistant to rusting. 2 It is a hard material. 3 It is a pure metal. A 1, 2 and 3 B 1 and 2 only C 1 and 3…
Answer this question and get it marked →Four different metals are separately mixed with an equal volume of dilute hydrochloric acid. The table shows the rate of effervescence for each metal (metal; rate of…
Answer this question and get it marked →Which statement about the rusting of iron is correct? A The rusting of iron forms hydrated iron(II) oxide. B Barrier methods prevent rusting by excluding nitrogen and water. C A…
Answer this question and get it marked →Water is extracted from a river for use in a domestic water supply. Some treatments for domestic water are listed: chlorination; sedimentation and filtration; treatment with…
Answer this question and get it marked →A farmer knows his soil needs phosphorus and potassium. He has a choice of four fertilisers: 1 NH4NO3 2 (NH4)3PO4 3 KNO3 4 (NH2)2CO Which fertilisers should he use? A 1 and 2 B 1…
Answer this question and get it marked →Which strategies are useful in reducing the production of acid rain? 1 planting trees 2 using catalytic converters in motor vehicles 3 reducing livestock farming 4 using…
Answer this question and get it marked →The structures of four organic compounds, W, X, Y and Z, are shown. W is propane (CH3CH2CH3). X is propene (CH3CH=CH2). Y is ethanol (CH3CH2OH). Z is ethane (CH3CH3). Which…
Answer this question and get it marked →Which molecular formula represents an alkene? A C2H6O B C2H6 C CH4 D C3H6
Answer this question and get it marked →Which row identifies the petroleum fractions used to reduce the friction between metal parts in engines and as a fuel in cars? (columns: fraction used to reduce friction in…
Answer this question and get it marked →Four fuels are listed: 1 ethanol 2 coal 3 hydrogen 4 natural gas Which fuels are fossil fuels? A 1, 2 and 3 B 1 and 3 only C 2 and 4 D 4 only
Answer this question and get it marked →Aqueous bromine is added to two test-tubes. Excess hexene is added to one test-tube. Excess hexane is added to the second test-tube. Which row describes the observation in each…
Answer this question and get it marked →The structure of a compound, G, is shown (CH3CH2COOH); G is in the same homologous series as ethanoic acid. Which row describes an aqueous solution of G? (columns: produces a gas…
Answer this question and get it marked →When zinc reacts with dilute sulfuric acid, hydrogen gas is produced. Which apparatus is needed to investigate the effect of temperature on the rate of this reaction? 1…
Answer this question and get it marked →Two tests are carried out on substance Z: test 1 a flame test produces a red flame; test 2 Z is dissolved in water and dilute nitric acid is added, followed by aqueous silver…
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