IGCSE Chemistry (0620) — October–November 2023, 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 statement about solids, liquids or gases is correct? A Solids are easy to compress. B Liquids are easy to compress. C Liquids expand to fill their container. D Gases expand…
Answer this question and get it marked →Which substance is a mixture? A air B graphite C oxygen D water
Answer this question and get it marked →The structure of an atom of element X is shown. key 5p = electron 6n n = neutron p = proton What is element X? A boron B carbon C sodium D sulfur
Answer this question and get it marked →Sodium reacts with chlorine to form sodium chloride. Which statements describe what happens to the sodium atoms in this reaction? 1 Sodium atoms form positive ions. 2 Sodium atoms…
Answer this question and get it marked →Which statement about ammonia is correct? A It conducts electricity when liquid. B It contains three covalent bonds. C It has a high boiling point. D It has a giant covalent…
Answer this question and get it marked →Which row describes the structure and a use of graphite? structure use A giant covalent lubricant B giant covalent cutting tools C simple molecular lubricant D simple molecular…
Answer this question and get it marked →The equation represents the reaction between solid magnesium oxide and dilute hydrochloric acid to form magnesium chloride and water. MgO + 2HCl → MgCl 2 + H2O Which row shows the…
Answer this question and get it marked →What is the equation for the reaction between calcium and chlorine? A 2Ca + Cl → Ca2Cl B 2Ca + Cl 2 → Ca2Cl 2 C Ca + Cl → CaCl D Ca + Cl 2 → CaCl 2
Answer this question and get it marked →Calcium nitrate has the formula Ca(NO3)2. What is the relative formula mass, Mr, of calcium nitrate? A 102 B 150 C 164 D 204
Answer this question and get it marked →Dilute sulfuric acid is electrolysed using platinum electrodes. The gases produced at each electrode are collected. The gases are mixed together and ignited with a lighted splint.…
Answer this question and get it marked →Electricity is passed through molten sodium chloride using inert electrodes. What is observed at the electrodes? A A colourless gas is produced at the negative electrode. B A pale…
Answer this question and get it marked →Fuel cells are used as energy sources in cars. Which row gives a fuel used in a fuel cell and the products formed? fuel in a fuel cell products formed A hydrogen carbon dioxide…
Answer this question and get it marked →When water is added to anhydrous iron(III) chloride, FeCl 3, hydrated iron(III) chloride, FeCl 3•6H2O, is formed and energy is given out. FeCl 3 + 6H2O FeCl 3•6H2O Which reaction…
Answer this question and get it marked →Which process is a chemical change? A burning carbon in air B dissolving copper(II) sulfate crystals in water C evaporating ethanol D freezing water
Answer this question and get it marked →Anhydrous cobalt(II) chloride is blue and turns pink when water is added. How is this reaction reversed? A adding dilute acid B filtering C heating D cooling
Answer this question and get it marked →Ethanol can be turned into ethanoic acid by passing it over hot copper(II) oxide. CH3CH2OH + 2CuO → CH3COOH + H2O + 2Cu What is this type of reaction? A precipitation B redox C…
Answer this question and get it marked →When heated strongly, silicon(IV) oxide reacts with carbon. SiO2 + 2C → Si + 2CO Which term describes what happens to silicon(IV) oxide? A thermal decomposition B neutralisation C…
Answer this question and get it marked →Information about four solutions, P, Q, R and S, is listed. Solution P reacts with ammonium chloride to form ammonia. Solution Q reacts with sodium carbonate to form carbon…
Answer this question and get it marked →Which oxides are basic? 1 calcium oxide 2 sodium oxide 3 iron(II) oxide A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 3 only
Answer this question and get it marked →Which row describes the changes across a period of the Periodic Table, from left to right? number of metallic character outer-shell electrons A decreases decreases B decreases…
Answer this question and get it marked →Which row shows properties of an element that is in the same group of the Periodic Table as lithium? electrical density conductivity in g / cm3 A high 0.97 B high 8.93 C low 0.07…
Answer this question and get it marked →Which row describes how the properties of Group I elements change as the group is descended? melting point density reactivity A increases increases increases B increases decreases…
Answer this question and get it marked →The elements in Group VII include chlorine, bromine and iodine. Which statements are correct? 1 Iodine is more dense than chlorine. 2 Iodine displaces chlorine from a solution…
Answer this question and get it marked →Cobalt is a transition element. What is a property of cobalt? A It can form coloured compounds. B It is a poor electrical conductor. C It has a low density. D It has a low melting…
Answer this question and get it marked →Which statements about brass are correct? 1 It is an alloy of zinc and copper. 2 It is a compound of zinc and copper. 3 It is a mixture of zinc and copper. A 1 and 3 B 1 only C 2…
Answer this question and get it marked →Aluminium is used to make containers for storing food. Which property makes it suitable for this use? A conducts heat B low density C resists corrosion D shiny surface
Answer this question and get it marked →Which pair of diagrams represents both a pure metal and an alloy? A B pure metal alloy pure metal alloy C D pure metal alloy pure metal alloy
Answer this question and get it marked →A metal M is between sodium and magnesium in the reactivity series. Which reactions occur with M and its oxide? M can be extracted M reacts with steam by heating its oxide with…
Answer this question and get it marked →The diagrams show experiments to investigate rusting of iron nails. 1 2 3 layer of oil tap salt boiled water water water In which test-tubes do the nails rust? A 1, 2 and 3 B 1…
Answer this question and get it marked →Some uses of water are listed. 1 for drinking 2 in chemical reactions 3 in swimming pools 4 in washing For which uses is it necessary to chlorinate the water? A 1 and 2 B 1 and 3…
Answer this question and get it marked →Two tests are done on an NPK fertiliser. test 1 flame test test 2 heat with aqueous sodium hydroxide and aluminium foil Which observations are made? test 1 test 2 A green flame…
Answer this question and get it marked →The gases from the engine of a car contain oxides of nitrogen. How are these oxides formed? A Nitrogen reacts with carbon dioxide. B Nitrogen reacts with carbon monoxide. C…
Answer this question and get it marked →Which statements explain why plastics should be recycled? 1 They do not decompose when added to land fill. 2 They pollute rivers and oceans, harming wildlife. 3 They can produce…
Answer this question and get it marked →Unwanted vegetation is sometimes placed in a bin where it decomposes. The compost formed is used to fertilise soils. Which gas is likely to be present in a higher percentage…
Answer this question and get it marked →Ethene reacts with steam and with bromine in two separate reactions. What are the products of these two reactions? A ethanoic acid and bromoethane B ethanoic acid and…
Answer this question and get it marked →Four types of reactions are listed. 1 substitution 2 combustion 3 polymerisation 4 addition Which reactions will ethane undergo? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4
Answer this question and get it marked →The flow diagram shows how poly(ethene) may be made from petroleum. 1 2 3 petroleum fuel oil ethene poly(ethene) What are stages 1, 2 and 3? 1 2 3 A cracking polymerisation…
Answer this question and get it marked →Magnesium reacts with dilute hydrochloric acid to produce hydrogen gas. Which pieces of apparatus are needed to determine the rate of this reaction? 1 2 3 4 A 1 and 2 B 1 and 3 C…
Answer this question and get it marked →The chromatograms of four different dyes are shown. pencil line 1 2 3 4 How many different colours are present in the four dyes? A 4 B 5 C 6 D 13
Answer this question and get it marked →The results of some tests on an aqueous solution of substance X are listed. 1 A cream precipitate is produced when adding aqueous silver nitrate. 2 Adding aqueous sodium hydroxide…
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