IGCSE Chemistry (0971) — May–June 2024, Paper 12
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 gases is correct? A Gases are difficult to compress when pressure is applied. B The particles in gases are close together. C The particles in gases have a…
Answer this question and get it marked →A sample of argon gas is heated in a closed container. Which row describes what happens to the pressure and the size of the argon atoms? Columns: pressure, size. A decreases,…
Answer this question and get it marked →Which statement is correct? A Air is a mixture of gaseous elements only. B Alloys are formed when a metal is ionically bonded to other elements. C Carbon dioxide is a mixture of…
Answer this question and get it marked →Which row identifies methods of testing the purity of a compound? Columns (tick/cross): melting point, boiling point, chromatography. A melting point yes, boiling point yes,…
Answer this question and get it marked →Which row shows the number of protons, neutrons and electrons in the ion shown (an oxide ion, 18/8 O 2-)? Columns: protons, neutrons, electrons. A 10, 8, 8 B 8, 10, 8 C 10, 8, 10…
Answer this question and get it marked →Isotopes of the same element have some features that are the same and some that are different. Which row shows the features that are the same (tick) and those that are different…
Answer this question and get it marked →The electronic configurations of four atoms, W, X, Y and Z, are shown: W 2; X 2,6; Y 2,8,2; Z 2,8,6. Which atoms form an ion with a charge of 2- when they react? A W and Y B W…
Answer this question and get it marked →Which statement about bonding is correct? A All the atoms in CH4, NH3 and H2O molecules have noble gas electronic configurations. B Calcium chloride is a covalent molecule. C…
Answer this question and get it marked →Which statement about diamond is correct? A It is a giant covalent structure consisting of carbon atoms and each atom is bonded to four other atoms. B It is a giant covalent…
Answer this question and get it marked →Which row shows the correct formulae of lead(II) bromide and butane? Columns: lead(II) bromide, butane. A PbBr2, C4H8 B PbBr2, C4H10 C Pb2Br, C4H8 D Pb2Br, C4H10
Answer this question and get it marked →Calcium phosphate forms when calcium chloride and sodium phosphate solutions react together: x CaCl2 + y Na3PO4 - 2Ca3(PO4)2 + 12NaCl. Which values of x and y balance the…
Answer this question and get it marked →What is the definition of relative molecular mass, Mr? A It is the average mass of the isotopes in a compound. B It is the sum of the atomic numbers in a compound. C It is the sum…
Answer this question and get it marked →In an experiment, a molten compound is broken down using electricity. Which row identifies the negative electrode and the general name for the molten compound being broken down?…
Answer this question and get it marked →Hydrogen-oxygen fuel cells can be used to power vehicles. What is produced by the fuel cells? 1 carbon dioxide 2 electricity 3 water A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2…
Answer this question and get it marked →Three reactions are described. 1 An acid is added to substance H. Rapid fizzing happens and the temperature decreases. 2 When substance J is ignited, it produces large quantities…
Answer this question and get it marked →Which of the processes produces a physical change? A thermal decomposition of calcium carbonate B addition of sodium chloride to water C addition of magnesium to hydrochloric acid…
Answer this question and get it marked →A known mass of gaseous ammonia and excess gaseous hydrogen chloride react together to make solid ammonium chloride. Line X shows the total mass of ammonium chloride produced over…
Answer this question and get it marked →The equation for the hydration of anhydrous copper(II) sulfate is: CuSO4 + 5H2O - CuSO4.5H2O. Which colour change is observed in this reaction? A blue to white B white to blue C…
Answer this question and get it marked →Which of the reactions show the underlined substance being reduced? 1 CuO + H2 - Cu + H2O (CuO underlined) 2 2Mg + O2 - 2MgO (Mg underlined) 3 MgO + 2HCl - MgCl2 + H2O (MgO…
Answer this question and get it marked →Four different solutions are separately tested with blue litmus and with methyl orange. Each is known to be acidic or alkaline. Results: solution 1 blue litmus red, methyl orange…
Answer this question and get it marked →Which statement about sulfur dioxide or calcium oxide is correct? A Calcium oxide is an acid. B Calcium oxide turns thymolphthalein yellow. C Sulfur dioxide is a base. D Sulfur…
Answer this question and get it marked →Which substances can be used to make pure crystals of sodium sulfate? A potassium sulfate and sodium hydroxide B sodium carbonate and sulfuric acid C sodium nitrate and magnesium…
Answer this question and get it marked →Which statements describe changes that occur from left to right across a period of the Periodic Table? 1 The atomic number of the elements increases. 2 The metallic character of…
Answer this question and get it marked →Part of the Periodic Table is shown with four elements labelled A, B, C, D in different positions. Which element is the most reactive non-metal? (The labelled position near the…
Answer this question and get it marked →An alloy contains aluminium, copper, magnesium, manganese, silver and zirconium. Which row identifies the number of transition elements in the alloy and the relative density of…
Answer this question and get it marked →Which statement about the halogens and their compounds is correct? A The colour of the element gets lighter going down Group VII. B The elements get less dense going down Group…
Answer this question and get it marked →Which row describes an element in Group VIII of the Periodic Table? Columns: boiling point / degrees C, structure. A -107, diatomic B -107, monatomic C 107, diatomic D 107,…
Answer this question and get it marked →Magnesium reacts with dilute hydrochloric acid. Which gas is given off in this reaction? A carbon dioxide B chlorine C hydrogen D oxygen
Answer this question and get it marked →Which statement about aluminium is correct? A Aluminium is easy to extract from its ore because it is near the bottom of the reactivity series. B Aluminium is formed when…
Answer this question and get it marked →Which statement shows that a liquid is pure water? A It boils at 100 degrees C. B It has a pH value of 7. C It turns blue cobalt(II) chloride pink. D It turns white copper(II)…
Answer this question and get it marked →Which compound can be added to ammonium sulfate to make an NPK fertiliser? A (NH4)3PO4 B KNO3 C K3PO4 D CO(NH2)2
Answer this question and get it marked →Four gases found in air are listed. 1 carbon dioxide 2 carbon monoxide 3 methane 4 sulfur dioxide Which gases lead directly to global warming when their concentrations are…
Answer this question and get it marked →The structures of four organic compounds 1-4 are shown: 1 CH3CH2OH (ethanol); 2 CH2=CH2 (ethene); 3 CH3OH (methanol); 4 CH4 (methane). Which compounds are members of the same…
Answer this question and get it marked →Which of the statements about propene are correct? 1 Propene contains only single bonds. 2 Propene decolourises aqueous bromine. 3 Propene is obtained by cracking large alkanes. 4…
Answer this question and get it marked →Petroleum is a mixture. Which method is used to separate petroleum into its components? A chromatography B cracking C filtration D fractional distillation
Answer this question and get it marked →The equation for a reaction that produces ethanol is: ethene + steam - ethanol. Which type of reaction does the equation represent? A addition B combustion C fermentation D…
Answer this question and get it marked →Four statements about ethene or poly(ethene) are listed. 1 Poly(ethene) is produced by an addition reaction. 2 Ethene is a monomer. 3 Poly(ethene) is a monomer. 4 Poly(ethene)…
Answer this question and get it marked →Sea water contains dissolved sodium chloride. Which method is used to obtain pure water from sea water? A chromatography B distillation C evaporation D filtration
Answer this question and get it marked →Which piece of apparatus is used to measure exactly 21.4 cm3 of water? A a 25 cm3 beaker B a 25 cm3 pipette C a 50 cm3 burette D a 50 cm3 measuring cylinder
Answer this question and get it marked →An aqueous solution of compound M is tested. The results are: a lilac colour in a flame test; a white precipitate when tested with acidified barium nitrate. What is compound M? A…
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