AS & A Level Chemistry (9701) — October–November 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 species contains a different number of electrons from the other three? A ClO₄⁻ B H₂SO₄ C SO₄²⁻ D Te²⁻
Answer this question and get it marked →Which factor causes helium to have a higher first ionisation energy than hydrogen? A In the 1s orbital in helium, electrons are paired. B The lowest energy level in helium is…
Answer this question and get it marked →A 0.216 g sample of aluminium carbide reacts with an excess of water to produce methane gas. This is the only carbon-containing product formed in the reaction. This methane gas…
Answer this question and get it marked →A reaction between two gases takes place on the surface of the catalytic converter of a petrol-engined car. In this reaction, four reactant molecules produce three product…
Answer this question and get it marked →An ion contains 1 nitrogen atom and 2 hydrogen atoms. It has an H–N–H bond angle of approximately 105°. Which row is correct? number of lone pairs around N in ion overall charge…
Answer this question and get it marked →Why does ICl have a higher boiling point than Br₂? A because of the difference in the bond energies of the covalent bonds within ICl and Br₂ B because of the difference in the…
Answer this question and get it marked →In this question you may assume that nitrogen behaves as an ideal gas. One atmosphere pressure = 101 kPa. Which volume does 1.0 g of nitrogen occupy at 50 °C and a pressure of 2.0…
Answer this question and get it marked →Which statement about the properties associated with the different types of bonding involved is correct? A Any covalent compound that contains both oxygen and hydrogen in its…
Answer this question and get it marked →For which reaction is the enthalpy change an enthalpy change of formation? A C(g) + 2H₂(g) → CH₄(g) B ½N₂(g) + ½O₂(g) → NO(g) C Na₂O(s) + SO₃(g) → Na₂SO₄(s) D PCl₃(g) + Cl₂(g) →…
Answer this question and get it marked →Two standard enthalpy change of formation values are given. ΔH°f [VCl₂] = −452 kJ mol⁻¹ ΔH°f [VCl₃] = −573 kJ mol⁻¹ What is the enthalpy change for the reaction 3VCl₂ → 2VCl₃ + V…
Answer this question and get it marked →Equations for some reactions of hydrogen peroxide are given. 1 2Fe²⁺ + H₂O₂ + 2H⁺ → 2Fe³⁺ + 2H₂O 2 2MnO₄⁻ + 5H₂O₂ + 6H⁺ → 2Mn²⁺ + 8H₂O + 5O₂ 3 2Fe³⁺ + H₂O₂ + 2OH⁻ → 2Fe²⁺ + O₂ +…
Answer this question and get it marked →The equation for the reaction of aqueous thiosulfate ions, S₂O₃²⁻, and aqueous dioxo-vanadium ions, VO₂⁺, is shown. 2S₂O₃²⁻ + xVO₂⁺ + yH⁺ → S₄O₆²⁻ + zVO²⁺ + 2H₂O Which row shows…
Answer this question and get it marked →When some solid Ca₅(PO₄)₃OH is added to a beaker of water, an equilibrium is set up. Ca₅(PO₄)₃OH(s) ⇌ 5Ca²⁺(aq) + 3PO₄³⁻(aq) + OH⁻(aq) Which compound, when added to the…
Answer this question and get it marked →Gaseous hydrogen and gaseous iodine react to form gaseous hydrogen iodide. H₂(g) + I₂(g) ⇌ 2HI(g) In an experiment, 2.0 mol of hydrogen and 2.0 mol of iodine are placed in a…
Answer this question and get it marked →Why does the rate of a gaseous reaction increase when the pressure is increased at a constant temperature? A More particles have energy that exceeds the activation energy. B The…
Answer this question and get it marked →The Boltzmann distribution for a mixture of gases capable of reaction is shown. The two curves represent the mixture of gases at 25 °C and at 35 °C. The activation energies for…
Answer this question and get it marked →Which oxide is insoluble in aqueous sodium hydroxide? A MgO B Al₂O₃ C P₄O₁₀ D SO₂
Answer this question and get it marked →Sodium and sulfur are burned separately in oxygen. Each reaction has a distinctive coloured flame. Which row is correct? Na + O₂ S + O₂ --- --- --- A white flame blue flame B…
Answer this question and get it marked →X and Y are elements in Period 3 of the Periodic Table. Y has a greater atomic number than X. The stable ion formed by Y has a greater radius than the stable ion formed by X. The…
Answer this question and get it marked →X is a Group 2 element in either Period 3 or Period 5. X(OH)₂ is less soluble in water than Ca(OH)₂. When X(NO₃)₂ is heated, it decomposes. Which row is correct? identity of X…
Answer this question and get it marked →Which statement comparing magnesium and barium, or their compounds, is correct? A Magnesium reacts with dilute hydrochloric acid more rapidly than barium does. B One mole of…
Answer this question and get it marked →The colours of the silver halides AgCl, AgBr and AgI differ. The solubilities of these halides in aqueous ammonia also differ. Which row is correct? colour of AgBr silver halide…
Answer this question and get it marked →The name 'chlorate' is used for an anion consisting of chlorine and oxygen only. In a molecule of ICl, the iodine atom has oxidation number x and the chlorine atom has oxidation…
Answer this question and get it marked →Which statement is correct? A An ammonium ion is basic due to a lone pair of electrons on the nitrogen atom. B Nitrogen monoxide, NO, reacts with peroxyacetyl nitrate to produce a…
Answer this question and get it marked →The diagram shows the structural formula of a hydrocarbon molecule Q. Molecule Q has a six-carbon main chain that contains a C=C double bond and a C≡C triple bond. One of the…
Answer this question and get it marked →Compound X is found in cell walls of some bacteria. Its structural formula is shown. CH₃(CH₂)₁₇CH=CH(CH₂)₁₇CH(OH)CH(CH₃)CO₂H How many stereoisomers are there with this structural…
Answer this question and get it marked →Structural isomerism only should be considered when answering this question. How many straight-chain isomers are there with molecular formula C₄H₈Cl₂? A 6 B 7 C 8 D 9
Answer this question and get it marked →What is true of every nucleophile? A It attacks a double bond. B It donates a lone pair of electrons. C It is a single atom. D It is negatively charged.
Answer this question and get it marked →The diagram shows a synthetic route to produce 1-methylcyclohexanol. 1-methylcyclohex-1-ene reacts with HBr to give product X (1-bromo-1-methylcyclohexane), and X is then heated…
Answer this question and get it marked →X and Y are the reagents required to convert 1-bromopropane into butanoic acid. 1-bromopropane (CH₃CH₂CH₂Br) reacts with reagent X to give butanenitrile (CH₃CH₂CH₂CN), which then…
Answer this question and get it marked →The table shows three sets of reagents and reaction conditions. reagents reaction conditions --- --- --- 1 CH₂C(CH₃)CH₃ and HCl(g) room temperature 2 CH₃C(CH₃)(OH)CH₃ and SOCl₂…
Answer this question and get it marked →What are the only structures formed when butan-2-ol is heated with concentrated H₂SO₄? The options show sets of alkene structures formed by dehydration. A shows but-1-ene and…
Answer this question and get it marked →The compound 'leaf alcohol' is partly responsible for the smell of new-mown grass. leaf alcohol: CH₃CH₂CH=CHCH₂CH₂OH What will be formed when 'leaf alcohol' is oxidised using an…
Answer this question and get it marked →Compound X: - does not react with Tollens' reagent - forms a yellow precipitate with alkaline I₂(aq) - does not react with sodium. What could be the identity of X? A CH₃CHO B…
Answer this question and get it marked →Which compound can undergo nucleophilic addition? A bromoethane, C₂H₅Br B ethanal, CH₃CHO C ethane, C₂H₆ D ethene, C₂H₄
Answer this question and get it marked →C₂H₅COOCH₃ is reacted with aqueous acid. The products from this reaction are reacted with LiAlH₄ to form two molecules Y and Z. What are the identities of molecules Y and Z? A…
Answer this question and get it marked →A sample of propanoic acid of mass 3.70 g reacts with an excess of magnesium. A second sample of propanoic acid of mass 3.70 g reacts with an excess of sodium. Both reactions go…
Answer this question and get it marked →Which statement about H₂C=C(CH₃)CH₂CO₂CH₃ is correct? A It can be hydrolysed to a secondary alcohol. B It can be made using ethanoic acid and a suitable alcohol. C It gives a…
Answer this question and get it marked →Synthetic resins can be made by polymerisation of a variety of monomers including prop-2-en-1-ol, CH₂=CHCH₂OH. Which structure represents the repeat unit in the polymer…
Answer this question and get it marked →Vitamin C has the structure shown; it is a five-membered lactone ring (furan-2(5H)-one type) bearing several hydroxyl groups, with molecular formula C₆H₈O₆. The mass spectrum of…
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