AQA A-Level Chemistry Paper 3, June 2022
Every question from AQA A-Level Chemistry Paper 3, June 2022 (7405): 35 questions, 90 marks, each with its mark scheme and topic.
- Question 1 18 marks
Define enthalpy of lattice dissociation, calculate values from enthalpy cycles, determine enthalpy of solution from calorimetry data and evaluate uncertainty, and calculate Gibbs free-energy change and feasibility temperature.
Physical Chemistry · Required Practicals · 3.1.4 Energetics · 3.1.8 Thermodynamics · Required Practical 2: Measurement of an enthalpy change
- Question 2 6 marks
Calculate the empirical formula and value of x for the hydrated mineral tschermigite, and describe chemical tests with ionic equations to confirm the presence of ammonium, aluminium, and sulfate ions.
Physical Chemistry · Inorganic Chemistry · Required Practicals · 3.1.2 Amount of Substance · 3.2.6 Reactions of Ions in Aqueous Solution · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions
- Question 3 15 marks
Identify the mechanisms, isomers, draw the elimination mechanism, represent enantiomers in 3D, and explain the relative rates of hydrolysis for halogenoalkanes reacting with sodium hydroxide and silver nitrate.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.3 Halogenoalkanes · 3.3.7 Optical Isomerism
- Question 4 10 marks
Analyze the kinetics of the decomposition of hydrogen peroxide by plotting and interpreting concentration-time and rate-concentration graphs to determine reaction order.
Physical Chemistry · 3.1.5 Kinetics · 3.1.9 Rate Equations
- Question 5 11 marks
Explain catalytic cracking, the mechanism of autocatalysis in the manganate(VII)-ethanedioate reaction, and how cobalt ions catalyse the peroxodisulfate-iodide reaction using electrode potentials.
Physical Chemistry · Inorganic Chemistry · Organic Chemistry · 3.1.5 Kinetics · 3.1.11 Electrode Potentials · 3.2.5 Transition Metals · 3.3.2 Alkanes
- Question 6 1 mark
Identify which atom in its ground state contains at least one unpaired p electron.
Physical Chemistry · 3.1.1 Atomic Structure
- Question 7 1 mark
Deduce the formula of an organic acid given the moles of carbon dioxide produced on combustion and the volume and concentration of sodium hydroxide needed for neutralisation.
Physical Chemistry · Organic Chemistry · 3.1.2 Amount of Substance · 3.3.9 Carboxylic Acids and Derivatives
- Question 8 1 mark
Identify which substance out of graphite, methylbenzene, poly(propene), and sodium contains no delocalised electrons.
Physical Chemistry · Organic Chemistry · 3.1.3 Bonding · 3.3.4 Alkenes · 3.3.10 Aromatic Chemistry
- Question 9 1 mark
Identify the correct statement about gas molecules at a higher temperature based on the Maxwell–Boltzmann distribution curve.
Physical Chemistry · 3.1.5 Kinetics
- Question 10 1 mark
Identify which of the given substances has the correct oxidation state assigned to the specified element.
Physical Chemistry · 3.1.7 Oxidation, Reduction and Redox Equations
- Question 11 1 mark
Identify which change to a standard hydrogen electrode has no effect on its electrode potential.
Physical Chemistry · 3.1.11 Electrode Potentials
- Question 12 1 mark
Identify the correct statement about an electrochemical cell made of zinc and lead half-cells given their standard electrode potentials.
Physical Chemistry · 3.1.11 Electrode Potentials
- Question 13 1 mark
Identify which species cannot function as a Brønsted–Lowry acid from a given list of ions.
Physical Chemistry · 3.1.12 Acids and Bases
- Question 14 1 mark
Calculate the pH of a 0.020 mol dm⁻³ solution of a diprotic strong acid H₂X.
Physical Chemistry · 3.1.12 Acids and Bases
- Question 15 1 mark
Identify which pair of equimolar solutions, when mixed in equal volumes at 298 K, produces a resultant solution with a pH greater than 7.
Physical Chemistry · 3.1.12 Acids and Bases
- Question 16 1 mark
Identify which ionisation requires less energy than the first ionisation of magnesium.
Physical Chemistry · Inorganic Chemistry · 3.1.1 Atomic Structure · 3.2.1 Periodicity
- Question 17 1 mark
Identify the correct statement concerning the physical and chemical properties of Group 1 elements.
Physical Chemistry · Inorganic Chemistry · 3.1.1 Atomic Structure · 3.1.8 Thermodynamics · 3.2.1 Periodicity
- Question 18 1 mark
State the reason for adding dilute nitric acid prior to silver nitrate when testing for aqueous chloride ions.
Inorganic Chemistry · Required Practicals · 3.2.3 Group 7(17), The Halogens · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions
- Question 19 1 mark
Identify which pair of reagents reacts to form a tetrahedral complex ion.
Inorganic Chemistry · 3.2.5 Transition Metals
- Question 20 1 mark
Identify the type of reaction that occurs when excess concentrated hydrochloric acid is added to cobalt(II) chloride solution.
Inorganic Chemistry · 3.2.5 Transition Metals
- Question 21 1 mark
Calculate the volume of 0.020 mol dm⁻³ KMnO₄ solution required to completely oxidise 0.10 mol of vanadium(IV) ions using the provided redox equation.
Physical Chemistry · Inorganic Chemistry · 3.1.2 Amount of Substance · 3.1.7 Oxidation, Reduction and Redox Equations · 3.2.5 Transition Metals
- Question 22 1 mark
Identify the reaction mechanism when 2-bromopropane reacts with bromine to form 2,2-dibromopropane.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.2 Alkanes
- Question 23 1 mark
Identify which compound is formed from bromoethane via a nucleophilic substitution reaction.
Organic Chemistry · 3.3.3 Halogenoalkanes · 3.3.11 Amines
- Question 24 1 mark
Identify which statement is not correct for both primary and secondary alcohols.
Organic Chemistry · 3.3.5 Alcohols · 3.3.3 Halogenoalkanes · 3.3.9 Carboxylic Acids and Derivatives
- Question 25 1 mark
Identify which compound is an isomer of ethyl ethanoate.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.9 Carboxylic Acids and Derivatives
- Question 26 1 mark
Identify which given organic formula represents an amide.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.9 Carboxylic Acids and Derivatives
- Question 27 1 mark
Identify which compound can react with suberoyl chloride to form a polymer.
Organic Chemistry · 3.3.9 Carboxylic Acids and Derivatives · 3.3.12 Polymers
- Question 28 1 mark
Identify which polymer is not hydrolysed when heated with aqueous alkali.
Organic Chemistry · 3.3.4 Alkenes · 3.3.12 Polymers
- Question 29 1 mark
Identify the predominant ionic species of aspartic acid present in an aqueous solution at pH = 14.
Organic Chemistry · 3.3.13 Amino Acids, Proteins and DNA
- Question 30 1 mark
Identify which reaction type is not involved in a three-step synthetic sequence from phenylethanone to 1-(3-nitrophenyl)ethyl ethanoate.
Organic Chemistry · 3.3.8 Aldehydes and Ketones · 3.3.9 Carboxylic Acids and Derivatives · 3.3.10 Aromatic Chemistry · 3.3.14 Organic Synthesis
- Question 31 1 mark
Identify which pair of reagents does not produce ethanol.
Organic Chemistry · 3.3.3 Halogenoalkanes · 3.3.5 Alcohols · 3.3.8 Aldehydes and Ketones · 3.3.9 Carboxylic Acids and Derivatives
- Question 32 1 mark
Identify the type of interaction responsible for maintaining the secondary structure of a protein in an alpha helix.
Organic Chemistry · 3.3.13 Amino Acids, Proteins and DNA
- Question 33 1 mark
Identify the correct statement about the amino acid serine, HOCH2CH(NH2)COOH.
Organic Chemistry · 3.3.11 Amines · 3.3.13 Amino Acids, Proteins and DNA
- Question 34 1 mark
Identify which compound can be dehydrated to form an alkene.
Organic Chemistry · 3.3.4 Alkenes · 3.3.5 Alcohols
- Question 35 1 mark
Identify which given compound is not a 2-aminocarboxylic acid.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.13 Amino Acids, Proteins and DNA