AS & A Level Chemistry (9701) — May–June 2023, Paper 13
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Propanoic acid is treated with reagent X at room temperature. The organic product of the reaction is sodium propanoate. No gas is produced during the reaction. What could be…
Answer this question and get it marked →The ionic equation shows iodide ions reacting with manganate(VII) ions in acidic solution. uMnO4- + vH+ + wI- - xMn2+ + yH2O + zI2 The letters u, v, w, x, y and z all represent…
Answer this question and get it marked →A piece of rock has a mass of 2.00 g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0 cm3 of 0.500 mol dm^-3 hydrochloric acid. What is…
Answer this question and get it marked →L and M are elements in Period 3 of the Periodic Table. Neither element is argon. Information about the Pauling electronegativity values of L and M is given. element Pauling…
Answer this question and get it marked →Ammonia reacts with acids to form the ammonium ion. NH3 + H+ <= NH4+ Which row is correct? shape of NH4+ bond angle in NH4+ / deg --- --- --- A pyramidal 107 B pyramidal 109.5 C…
Answer this question and get it marked →Electronegativity differences can be used to help determine the oxidation number of an atom in different species. A number of rules are used which include: - The more…
Answer this question and get it marked →Which assumptions are made about ideal gases? 1 Ideal gases contain molecules with no mass. 2 Ideal gases contain molecules with no volume. 3 Ideal gases have no intermolecular…
Answer this question and get it marked →A 200 cm3 sample of water has an amount of oxygen gas dissolved in it. This amount of oxygen gas has a volume of 6.00 cm3 when measured at 1.00 x 10^5 Pa and 35 degC. What is the…
Answer this question and get it marked →Which statement explains why buckminsterfullerene has a lower melting point than graphite? A Buckminsterfullerene exists as discrete molecules with weak intermolecular bonding. B…
Answer this question and get it marked →Which equation represents the reaction whose standard enthalpy change is the standard enthalpy change of formation of water? A 2H2(g) + O2(g) - 2H2O(l) B H2(g) + 1/2 O2(g) -…
Answer this question and get it marked →Which mixture will react to form exactly one mole of water? volume 2.00 mol dm^-3 H2SO4 / cm3 volume 1.00 mol dm^-3 NaOH / cm3 --- --- --- A 250 500 B 250 1000 C 500 500 D 500 1000
Answer this question and get it marked →The enthalpy change for neutralisation of HNO3(aq) with NaOH(aq) is -57.0 kJ mol^-1. In an experiment, 20.0 cm3 of 4.00 mol dm^-3 HNO3 is mixed with 30.0 cm3 of 2.00 mol dm^-3…
Answer this question and get it marked →Some bond energies are listed. bond bond energy / kJ mol^-1 --- --- H-H 436 O-H 463 O-O 146 O=O 496 One mole of hydrogen reacts with oxygen to give water vapour. Using these bond…
Answer this question and get it marked →Which particle contains nitrogen in the same oxidation state as in the ion N2O5^2-? A NH2F B N2O4 C NO3- D HNF2
Answer this question and get it marked →Sulfur dioxide reacts with oxygen as shown. 2SO2(g) + O2(g) <= 2SO3(g) delta H = -197 kJ mol^-1 Which change will move the equilibrium position to the right side and change the…
Answer this question and get it marked →Solutions X and Y both have a concentration of 0.10 mol dm^-3. A fixed volume of solution X is added to a conical flask, and solution Y is added from a burette to the conical…
Answer this question and get it marked →Which row shows the expected properties of the element astatine when compared to the properties of the element iodine? electronegativity of astatine compared to iodine volatility…
Answer this question and get it marked →The rate of an exothermic reaction is followed by measuring the concentration of a reactant at regular time intervals. During the experiment the temperature of the reaction…
Answer this question and get it marked →For a particular reversible reaction the backward reaction is endothermic. The activation energy of the backward reaction is 160 kJ mol^-1. It can be assumed that the backward…
Answer this question and get it marked →HCN has been detected in interstellar gas. The molecules below have also been detected in interstellar gas. Which molecule contains the same total number of valence shell (outer…
Answer this question and get it marked →The diagram shows the Boltzmann distribution of the energy of gaseous molecules at a particular temperature. The distribution rises from the origin to a peak labelled Y and then…
Answer this question and get it marked →The elements magnesium and phosphorus are reacted separately with an excess of oxygen to form their oxides. Each oxide is then added separately to water and the pH values of the…
Answer this question and get it marked →Equal volumes of saturated solutions of magnesium hydroxide, calcium hydroxide and strontium hydroxide are completely neutralised with dilute sulfuric acid. The water is gently…
Answer this question and get it marked →Which statement about the halogens is correct? A Iodine cannot behave as an oxidising agent. B The volatility of the elements increases from chlorine to iodine because of the…
Answer this question and get it marked →When concentrated sulfuric acid is added to solid sodium bromide, bromine gas is produced, along with a number of other products. However, when concentrated sulfuric acid is added…
Answer this question and get it marked →Which statement about the oxides of nitrogen is correct? A During lightning storms, atmospheric oxygen and nitrogen combine to form oxides of nitrogen. B In a catalytic converter,…
Answer this question and get it marked →Structural isomerism and stereoisomerism should be considered when answering this question. 2-bromopentane is heated with an excess of ethanolic sodium hydroxide. How many…
Answer this question and get it marked →Which compound is a secondary alcohol that can be dehydrated to form an alkene with Mr = 70? Four skeletal structures of alcohols are shown. A is a branched alcohol…
Answer this question and get it marked →The conversion of propan-1-ol into propan-2-ol can be completed in a two-stage synthesis. The first stage is to heat the propan-1-ol with concentrated sulfuric acid. Which reagent…
Answer this question and get it marked →Which type of reaction happens during the hydrolysis of 2-bromopropane? A electrophilic addition B free radical substitution C nucleophilic addition D nucleophilic substitution
Answer this question and get it marked →A mixture of ethane and an excess of chlorine is exposed to UV light. How many different products, each containing only two carbon atoms and at least one chlorine atom per…
Answer this question and get it marked →When 1-methylcyclohexene reacts with Br2 the product is X. When 1-methylcyclohexene reacts with HBr the major product is Y. Which statement is correct? A X is a mixture of two…
Answer this question and get it marked →T is an organic compound which contains 66.7% by mass of carbon. T also contains one atom of oxygen per molecule. T reacts with alkaline I2(aq) to produce a yellow precipitate.…
Answer this question and get it marked →Which statement about butanone is correct? A Butanone can be dehydrated by concentrated sulfuric acid to give CH2=CHCH=CH2. B Butanone gives a positive result with Tollens'…
Answer this question and get it marked →Methylbut-2-ene reacts with HBr at room temperature to produce compound X as a major product. Compound X reacts with KCN in ethanol to produce compound Y. Compound Y is hydrolysed…
Answer this question and get it marked →Compound Q can be hydrolysed by HCl(aq). The two products of this hydrolysis have the same empirical formula. What could Q be? A CH3CO2CH2CH2OH B CH3CO2CH2CH2CO2H C…
Answer this question and get it marked →An unsaturated carboxylic acid reacts with alcohol X to form an ester. The structure of the ester is shown: it is the ester of an unsaturated carboxylic acid (containing a C=C…
Answer this question and get it marked →Which two-step process converts cyclohexanol into cyclohexane-1,2-diol? Cyclohexanol (a cyclohexane ring bearing one -OH group) is converted to cyclohexane-1,2-diol (a cyclohexane…
Answer this question and get it marked →In polymer G every carbon atom in the polymer chain is bonded to one hydrogen atom and one methyl group. Which alkene could be polymerised to make polymer G? A but-1-ene B…
Answer this question and get it marked →The mass spectrum of compound X has M, M+1 and M+2 peaks. Other peaks are also present. Peak M is the molecular ion peak, M+. Peak M has a relative abundance fifteen times that of…
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