AS & A Level Chemistry (9701) — October–November 2023, 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 particle contains 8 protons, 9 neutrons and 10 electrons? A: oxygen-16 anion, 16O with charge -1. B: 16O with charge 2-. C: 17O with charge -1. D: 17O with charge 2-.
Answer this question and get it marked →The second ionisation energy of oxygen is greater than the second ionisation energy of fluorine. Which factor explains this difference? A: The atomic radius of an oxygen atom is…
Answer this question and get it marked →Zinc reacts with concentrated nitric acid giving three products only: zinc nitrate, an oxide of nitrogen and water. 3.0 moles of zinc react with 8.0 moles of nitric acid; zinc…
Answer this question and get it marked →A 3.7 g sample of copper(II) carbonate is added to 25 cm3 of 2.0 mol dm-3 hydrochloric acid. Which volume of gas is produced at room conditions? A: 0.60 dm3. B: 0.72 dm3. C: 1.20…
Answer this question and get it marked →Ammonium ions, NH4+, are formed when ammonia gas reacts with hydrogen chloride gas. Which statement about the changes that occur in this reaction is correct? A: The dipole moment…
Answer this question and get it marked →Which feature is present in both ethene and poly(ethene)? A: bond angles of 109.5 degrees. B: pi covalent bonds. C: sigma covalent bonds. D: sp3 orbitals.
Answer this question and get it marked →Two compounds of boron are sodium borohydride, NaBH4, and boron trifluoride, BF3. What are the shapes of the borohydride ion and the boron trifluoride molecule? A: borohydride ion…
Answer this question and get it marked →In an experiment, 0.100 mol of propan-1-ol is burnt completely in 12.0 dm3 of oxygen, measured at room conditions. What is the final volume of gas, measured at room conditions? A:…
Answer this question and get it marked →At a temperature of 2500 K and a pressure of 1.00 x 10^-4 Pa, a sample of 0.321 g of sulfur vapour has a volume of 2.08 x 10^6 m3. What is the molecular formula of sulfur under…
Answer this question and get it marked →In the structure of solid SiO2, each silicon atom is bonded to x oxygen atoms, each oxygen atom is bonded to y silicon atoms, and each bond is a z type bond. What is the correct…
Answer this question and get it marked →Nitric acid is made industrially by the oxidation of ammonia; the overall equation 1 is NH3 + 2O2 - HNO3 + H2O. The process happens in three stages: stage 1: 4NH3 + 5O2 - 4NO +…
Answer this question and get it marked →Chlorine reacts with sodium bromide: 1/2Cl2 + NaBr - NaCl + 1/2Br2. Which words correctly describe this reaction? 1 redox; 2 displacement; 3 disproportionation. A: 1, 2 and 3. B:…
Answer this question and get it marked →The equation for the reaction between aqueous copper ions and aqueous iodide ions is 2Cu2+(aq) + 4I-(aq) - 2CuI(s) + I2(aq). What is the change in oxidation state of copper? A: +2…
Answer this question and get it marked →A mixture of the three gases oxygen, nitrogen and argon is at a total pressure of 500 kPa; there is a total of 1.2 moles of gas in the mixture. If the oxygen gas alone occupied…
Answer this question and get it marked →0.200 mol of sulfur dioxide and 0.200 mol of oxygen are placed in a 1.00 dm3 sealed container. The gases are allowed to react until equilibrium is reached: 2SO2 + O2 <= 2SO3. At…
Answer this question and get it marked →The decomposition of hydrogen peroxide in the presence of MnO2 produces water and oxygen gas: 2H2O2(aq) - 2H2O(l) + O2(g). The volume of gas collected when 0.2 g of MnO2 is added…
Answer this question and get it marked →The diagram shows a gas syringe with a free-moving piston containing gaseous hydrogen, gaseous iodine and gaseous hydrogen iodide at equilibrium: H2(g) + I2(g) <= 2HI(g). Three…
Answer this question and get it marked →Which row gives the best description of the variations in the melting points and the first ionisation energies of the elements in Period 3 from sodium to argon? A: melting points…
Answer this question and get it marked →X and Y are atoms of different elements in Period 3 of the Periodic Table; neither X nor Y is argon. X is a non-metal. X has a greater atomic radius than Y. Which statement is…
Answer this question and get it marked →Four mixtures are added to four separate 50 cm3 samples of water and stirred. Which mixture results in a solution with the highest pH? A: 1.0 g of aluminium oxide and 1.0 g of…
Answer this question and get it marked →What happens when a piece of magnesium ribbon is placed in cold water? A: A vigorous effervescence occurs. B: Bubbles of gas form slowly on the magnesium. C: The magnesium floats…
Answer this question and get it marked →The table gives some data for compounds of two elements from Group 2: for calcium the decomposition temperature of the carbonate is 840 degrees C, solubility of sulfate 4.66 x…
Answer this question and get it marked →Q is a mixture of two compounds of Group 2 elements. Q undergoes thermal decomposition to produce a white solid and only two gaseous products; one of the gaseous products relights…
Answer this question and get it marked →Iodine has a higher melting point than chlorine. What is the reason for this? A: Iodine has stronger covalent bonds than chlorine. B: Iodine molecules have stronger permanent…
Answer this question and get it marked →When concentrated sulfuric acid is added to solid sodium chloride, HCl is formed but not Cl2. When concentrated sulfuric acid is added to solid sodium iodide, I2 is formed. Which…
Answer this question and get it marked →NaOH(aq) is added to NH4Cl(aq) and the mixture is warmed. The gas that is produced turns damp red litmus paper blue. Which row is correct for the behaviour of the ammonium ion in…
Answer this question and get it marked →Artemisinin is a powerful anti-malarial drug; its skeletal structure is shown. How many chiral centres are there in each molecule of artemisinin? A: 4. B: 6. C: 7. D: 8.
Answer this question and get it marked →Which row shows the correct name and classification of the halogenoalkane CH3(CH2)2CBr(CH3)CH2CH3? A: 3-bromo-3-methylhexane, secondary. B: 3-bromo-3-methylhexane, tertiary. C:…
Answer this question and get it marked →How many geometrical (cis/trans) isomers are there of hexa-2,4-diene, CH3CH=CHCH=CHCH3? A: none; hexa-2,4-diene does not show geometric isomerism. B: 2. C: 3. D: 4.
Answer this question and get it marked →The structure of compound X is shown - a chain with two C=C double bonds, one of which is a 2-methylbut-2-ene-type internal double bond and the other a terminal double bond. One…
Answer this question and get it marked →The formulae of three compounds are shown: C3H7CHO, C2H5COCH3 and CH2CHCH2CH2OH. Only one of these compounds will decolourise bromine water; only one will produce a silver mirror…
Answer this question and get it marked →Which list contains a compound that is not made during the free radical substitution of methane with chlorine? A: CH3Cl, CCl4, C2H6. B: Cl2, CH2Cl2, CCl4. C: CH3Cl, CH2Cl2, CHCl3.…
Answer this question and get it marked →Propanoic acid can be used to make propene by a two-stage synthesis. Which row shows suitable reagents for this synthesis? A: first stage LiAlH4, second stage conc. H2SO4. B:…
Answer this question and get it marked →Which alcohol reacts with alkaline I2(aq) to produce ethanoate ions? A: ethanol. B: methylpropan-2-ol. C: propan-2-ol. D: butan-2-ol.
Answer this question and get it marked →Heating compound X, C7H14O2, under reflux with an excess of acidified potassium dichromate(VI) produces compound Y. Compound Y produces hydrogen gas with sodium metal and forms…
Answer this question and get it marked →Which reaction takes place by a nucleophilic addition mechanism? A: propene reacting with hydrogen bromide. B: 2-bromopropane reacting with sodium hydroxide in ethanol. C:…
Answer this question and get it marked →Three equations are shown: 1 CH3COOH + MgCO3 - CH3COOMg + CO2 + H2O; 2 CH3CH2COOH + Na - CH3CH2COONa + 1/2H2; 3 CH3CH2COOH + 2Ba(OH)2 - CH3CH2COOBa2 + 2H2O. Which of the equations…
Answer this question and get it marked →How many esters with the molecular formula C5H10O2 can be made by reacting a primary alcohol with a carboxylic acid? A: 4. B: 5. C: 6. D: 8.
Answer this question and get it marked →The diagram shows an ester (ethyl propanoate). It is heated under reflux with an excess of NaOH(aq). Which row shows the 2 products of the reaction? A: product 1 propanoic acid,…
Answer this question and get it marked →Oxygen has three stable isotopes, 16O, 17O and 18O. All three isotopes are present in a sample of oxygen gas, O2, which was analysed using a mass spectrometer. How many peaks…
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