IGCSE Chemistry (0971) — May–June 2023, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The diagram shows the result of dropping a purple crystal into water: a purple crystal in water turns into a purple solution after five hours. Which processes take place in this…
Answer this question and get it marked →Which row about elements, mixtures and compounds is correct? Columns: metallic element, non-metallic element, mixture, compound. A copper, methane, brass, sulfur B brass, sulfur,…
Answer this question and get it marked →What are the relative charge and relative mass of an electron? A relative charge 0, relative mass 1 B relative charge 0, relative mass 1/2000 C relative charge -1, relative mass 1…
Answer this question and get it marked →The atomic structures of four particles, W, X, Y and Z, are shown (electrons, neutrons, protons): W 2,2,2; X 2,2,3; Y 2,3,2; Z 3,2,3. Which particles are isotopes of the same…
Answer this question and get it marked →Which row shows the properties of an ionic compound? Columns: electrical conductivity of solid, melting point / degrees C. A good, 98 B good, 3652 C poor, 78 D poor, 801
Answer this question and get it marked →Which row describes the formation of single covalent bonds in methane? A atoms share a pair of electrons; both atoms gain a noble gas electronic structure B atoms share a pair of…
Answer this question and get it marked →Which equation represents the neutralisation of nitric acid using sodium hydroxide? A NaOH(aq) + HNO3(aq) - NaNO3(aq) + H2O(l) B NaOH(aq) + HNO3(aq) - NaNO3(l) + H2O(l) C NaOH(l)…
Answer this question and get it marked →What is the relative formula mass of ammonium nitrate, NH4NO3? A 80 B 108 C 122 D 150
Answer this question and get it marked →Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Gases X and Y are produced at the electrodes (X at one electrode, Y at the other). What are X and Y? A…
Answer this question and get it marked →Which statement about hydrogen fuel cells is correct? A Hydrogen fuel cells do not produce carbon dioxide. B Hydrogen fuel cells do not need oxygen. C The waste from a hydrogen…
Answer this question and get it marked →A reaction pathway diagram is shown in which the products are at a higher energy than the reactants. Which statement about this reaction is correct? A The reaction rate increases…
Answer this question and get it marked →Lumps of calcium carbonate react with dilute hydrochloric acid: CaCO3 + 2HCl - CaCl2 + H2O + CO2. Which change in conditions decreases the rate of the reaction? A increasing the…
Answer this question and get it marked →Solid copper(II) sulfate exists in two different forms, anhydrous and hydrated. One of these forms is blue and the other is white. The change between these two forms is…
Answer this question and get it marked →Four redox equations and statements about the equations are shown. 1 C + O2 - CO2, carbon is oxidised 2 CO2 + C - 2CO, carbon dioxide is oxidised 3 CO2 + C - 2CO, carbon is…
Answer this question and get it marked →Sodium hydroxide forms an alkaline solution with a pH of 14. Which indicator turns yellow when added to this solution? A litmus B methyl orange C thymolphthalein D universal…
Answer this question and get it marked →Which row identifies an acidic oxide and a basic oxide? Columns: acidic oxide, basic oxide. A CaO, CuO B CaO, SO2 C CO2, CuO D CO2, SO2
Answer this question and get it marked →A student makes aqueous copper(II) chloride by adding excess copper(II) carbonate to dilute hydrochloric acid. What is the next step in the method in the formation of solid…
Answer this question and get it marked →Which statements about the trends across a period of the Periodic Table are correct? 1 Aluminium is more metallic than sodium. 2 Beryllium is more metallic than carbon. 3 Boron is…
Answer this question and get it marked →Which row shows the trend in melting point, density and reactivity as Group I is descended? Columns: melting point, density, reactivity. A increases, decreases, decreases B…
Answer this question and get it marked →Which row describes a similarity and a difference between chlorine and bromine? A similarity: both are gases at room temperature and pressure; difference: chlorine and bromine…
Answer this question and get it marked →Which statement describes transition elements? A They have high densities and high melting points. B They have high densities and low melting points. C They have low densities and…
Answer this question and get it marked →Which diagram shows the electronic structure of a noble gas? Four dot-and-cross electronic structure diagrams A, B, C, D are shown.
Answer this question and get it marked →Which gas is made when powdered zinc is added to dilute hydrochloric acid? A carbon dioxide B chlorine C hydrogen D oxygen
Answer this question and get it marked →Which metal is used in aircraft manufacture because it has a low density? A aluminium B copper C iron D potassium
Answer this question and get it marked →The diagram represents the structure of a solid (a regular giant structure / lattice). Which solids does the diagram represent? Columns: brass, graphite, sodium chloride with…
Answer this question and get it marked →Three students, X, Y and Z, are told that solid P reacts with dilute acids and also conducts electricity. The table shows the students' suggestions about the identity of P: X…
Answer this question and get it marked →Which substances in the air are needed for iron to rust? A oxygen and water B oxygen only C water and carbon dioxide D water only
Answer this question and get it marked →Part of the reactivity series of metals is shown (in order of decreasing reactivity): metal P, carbon, metal Q, metal R. Which row shows how each metal is extracted from its ore?…
Answer this question and get it marked →Several processes are used to treat domestic water. Which row identifies a reason for the given process? A chlorination, removes impurities B filtration, removes insoluble solids…
Answer this question and get it marked →Which pair of compounds make an NPK fertiliser? A ammonium sulfate and potassium phosphate B calcium hydroxide and ammonium nitrate C calcium phosphate and potassium chloride D…
Answer this question and get it marked →Some information about gas X is listed: It is not present in clean, dry air; It is not a cause of respiratory problems; It is responsible for global warming. What is X? A carbon…
Answer this question and get it marked →Part of the structure of a molecule of vitamin A is shown (a carbon chain ending in a -C(=O)-O-H carboxylic acid group with two C=C double bonds). Which statements about this part…
Answer this question and get it marked →The fractional distillation of petroleum is shown, with petroleum entering and fractions tapped off at points labelled (top) fuel gas, then A, B, C, D, then bitumen (bottom).…
Answer this question and get it marked →Which equation represents the cracking of an alkane? A 3C2H4 - C6H12 B C6H12 + H2 - C6H14 C C6H14 - 6C + 7H2 D C6H14 - C2H4 + C4H10
Answer this question and get it marked →Which statements about ethanol are correct? 1 Ethanol is made by reacting steam with ethene at 300 degrees C. 2 Ethanol is made by fermentation at 55 degrees C. 3 Ethanol burns to…
Answer this question and get it marked →Which substances react with aqueous ethanoic acid to form a gas? 1 magnesium 2 magnesium carbonate 3 magnesium oxide A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only
Answer this question and get it marked →In reaction R, 2000 molecules of CH2=CH2 react to form a single molecule X only: 2000 CH2=CH2 - X. Which terms describe reaction R, CH2=CH2 and X? Columns: reaction R, CH2=CH2, X.…
Answer this question and get it marked →The concentration of acids and alkalis can be determined by titration. Which pieces of equipment are needed to perform a titration? Four pieces of apparatus labelled 1, 2, 3, 4…
Answer this question and get it marked →Which process is used to produce drinking water from sea water? A crystallisation B distillation C filtration D chlorination
Answer this question and get it marked →The results of two separate tests on a white solid X are shown. add dilute nitric acid - effervescence add aqueous sodium hydroxide and warm - a gas is formed which turns damp red…
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