AS & A Level Chemistry (9701) — May–June 2025, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →ICl3 reacts with water in a redox reaction. vICl3 + wH2O → xHCl + yHI + zHIO3 + zHClO3 What are the numbers v, x and z in the correctly balanced equation? A v=2, x=8, z=1 B v=2,…
Answer this question and get it marked →The rate of the reaction between a reactive metal and an excess of a dilute acid is investigated. The total volume of hydrogen gas produced is recorded every 30 seconds for 3…
Answer this question and get it marked →In the diagram, curve X was obtained by measuring the volume of oxygen produced during the decomposition of 100 cm^3 of 1.0 mol dm^-3 hydrogen peroxide. A catalyst of…
Answer this question and get it marked →The first seven ionisation energies of an element between lithium and neon in the Periodic Table are shown. 1310 3390 5320 7450 11000 13300 71000 kJ mol^-1 What is the outer…
Answer this question and get it marked →The reaction of hydrogen with oxygen is shown. 2H2(g) + O2(g) → 2H2O(l) Which expression corresponds to the standard enthalpy change of this reaction? A 2 × ΔHf°(H2O) B ΔHc°(H2O)…
Answer this question and get it marked →P is a compound that burns in an excess of oxygen to give carbon dioxide and water only. 2.20 g of P contains 1.20 g of carbon and 0.20 g of hydrogen. When P is added to a…
Answer this question and get it marked →Substance W has the physical properties shown. m.p./°C b.p./°C electrical conductivity of solid of liquid in water 2072 2980 poor good insoluble What is substance W? A aluminium…
Answer this question and get it marked →Which diagram represents the lattice structure of sodium chloride? A NaCl arrangement where each Na is surrounded by Cl atoms (covalent-like) B Ionic lattice with alternating +…
Answer this question and get it marked →An aqueous solution X contains substance HQ which behaves as a weak acid. HQ(aq) ⇌ H^+(aq) + Q^-(aq) The soluble salt NaQ is added to X. What happens to the [H^+(aq)] and the pH…
Answer this question and get it marked →Dinitrogen tetroxide, N2O4, decomposes reversibly. N2O4 ⇌ 2NO2 ΔH = +58.0 kJ mol^-1 An equilibrium mixture of N2O4 and NO2 gases is placed in a closed container under standard…
Answer this question and get it marked →50 cm^3 of 1.0 mol dm^-3 H2SO4 is added to 100 cm^3 of 1.0 mol dm^-3 NaOH in an insulated vessel. Both solutions are at a temperature of 20 °C before mixing. After mixing, the…
Answer this question and get it marked →Barium dithionate, BaS2O6·2H2O, is soluble in water. S2O6^2-(aq) ions slowly decompose in acidic solution: S2O6^2-(aq) → SO2(g) + SO4^2-(aq) 3.513 g of BaS2O6·2H2O is dissolved in…
Answer this question and get it marked →The diagram shows two containers of methane connected by a closed tap. Each container has a volume of 1.00 m^3. Container 1: 16 g methane at 100 kPa Container 2: 96 g methane at…
Answer this question and get it marked →Which statement about a 3p orbital is correct? A It can hold a maximum of six electrons. B It has the highest energy of the orbitals with principal quantum number 3. C It is at a…
Answer this question and get it marked →In which pair do both species: - have the same shape - have the same number of covalent bonds? A methane and the ammonium ion B carbon dioxide and nitrogen C boron trifluoride and…
Answer this question and get it marked →A reaction involving ammonium ions is shown. NH4^+ + OH^- ⇌ NH3 + H2O Four statements about this reaction are listed: 1 The ammonium ions are reduced. 2 In the reverse reaction,…
Answer this question and get it marked →Which reduction process occurs on the surface of a catalytic converter? A reduction of carbon dioxide and nitrogen oxides B reduction of carbon dioxide only C reduction of…
Answer this question and get it marked →Three statements about the halogens, chlorine, bromine and iodine and their compounds are listed. 1 The halogen with the highest boiling point has atoms which form the strongest…
Answer this question and get it marked →Which reagent or reagents and conditions will oxidise chlorine, Cl2, into a compound containing chlorine in the +5 oxidation state? A AgNO3(aq) followed by NH3(aq) at room…
Answer this question and get it marked →Which diagram shows the electronegativity of the elements Na, Mg, Al and Si plotted against their first ionisation energies? A Positive correlation, Si highest on both axes B Si…
Answer this question and get it marked →Radium is an element below barium in Group 2 of the Periodic Table. Which equation shows what happens when solid radium nitrate, Ra(NO3)2, is heated strongly? A 2Ra(NO3)2(s) →…
Answer this question and get it marked →The table shows some data for the elements in Period 3 of the Periodic Table. element melting point/K electrical conductivity sodium 371 good magnesium 922 good aluminium 933 good…
Answer this question and get it marked →Each mineral listed behaves as a mixture of two carbonate compounds. They can be used as fire retardants because they decompose in the heat, producing CO2. This gas smothers the…
Answer this question and get it marked →Compound X contains two Period 3 elements, Y and Z. Compound X reacts with water to form only two products: a slightly soluble hydroxide and compound Q. Q is a compound of element…
Answer this question and get it marked →Three reagents are listed. 1 aqueous sodium carbonate 2 LiAlH4 3 water Which reagents react with pure ethanoic acid to give a solution containing ethanoate ions? A 1 and 2 B 1 and…
Answer this question and get it marked →Complete combustion of compound T produces carbon dioxide and water only. Compound T produces steamy fumes with PCl5. Compound T does not give any visible product with…
Answer this question and get it marked →Information about carbonyl compound X is given. - Compound X reacts with LiAlH4 to produce a secondary alcohol. - Compound X reacts with alkaline I2(aq) to give a yellow…
Answer this question and get it marked →An organic compound J reacts with an excess of sodium to produce an organic ion with a charge of –3. J reacts with an excess of NaOH(aq) to produce an organic ion with a charge of…
Answer this question and get it marked →Which formula represents the organic compound formed by the reaction of propanoic acid with methanol in the presence of concentrated sulfuric acid as a catalyst? A CH3CH2COCH3 B…
Answer this question and get it marked →Structural isomerism and stereoisomerism should be considered when answering this question. 2,5-dibromohexane is heated under reflux with ethanolic KOH. How many isomeric…
Answer this question and get it marked →Considering only structural isomers, what is the number of alcohols of each type with the formula C5H12O? A primary=3, secondary=3, tertiary=2 B primary=4, secondary=2, tertiary=2…
Answer this question and get it marked →Which structure represents part of the polymer chain of PVC? A Alternating CHCl and CH2 units (incorrect pattern) B Alternating HCl and CH2 units every other carbon C Correct PVC:…
Answer this question and get it marked →A possible mechanism for the exothermic hydrolysis of 2-chloro-2-methylpropane is shown. Step 1 (slow): (CH3)3CCl → (CH3)3C^+ + Cl^- Step 2 (fast): (CH3)3C^+ + OH^- → (CH3)3COH…
Answer this question and get it marked →Compound W contains atoms of carbon, nitrogen and hydrogen. Compound W reacts with HCl(aq) to produce propanoic acid. Which row is correct? A functional group = amine, name =…
Answer this question and get it marked →Two reactions are described. 1 2-bromo-2-methylbutane heated with NaOH(aq) 2 2-chloro-2-methylbutane heated with NaOH(aq) In both reactions, the conditions are the same and…
Answer this question and get it marked →An alkene P reacts with an excess of hot concentrated acidified KMnO4(aq). Methylpropanoic acid is the only organic product. What is alkene P? A 2,5-dimethylhex-3-ene B…
Answer this question and get it marked →Three substances are listed. 1 butane 2 hydrogen 3 hydrogen bromide Which substances are possible products of the free-radical substitution reaction between ethane and bromine? A…
Answer this question and get it marked →The structure of the testosterone molecule is shown, with C1 (the carbon bearing the ketone C=O) and C2 (the carbon bearing the OH group) labelled. Which statements are correct? 1…
Answer this question and get it marked →The structural formula of hept-1,4,5-triene is shown. CH2=CHCH2CH=CCHCH3 How many of the carbon atoms in one molecule of hept-1,4,5-triene are sp^2 hybridised? A 4 B 5 C 6 D 7
Answer this question and get it marked →Hydrocarbon X is saturated. Each molecule contains one ring of carbon atoms. The mass spectrum of hydrocarbon X is measured. The peak representing the M+ ion is 14 mm high. The…
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