AQA A-Level Chemistry Paper 3, June 2018
Every question from AQA A-Level Chemistry Paper 3, June 2018 (7405): 34 questions, 90 marks, each with its mark scheme and topic.
- Question 1 19 marks
Determine the rate equation, rate constant, and reaction orders using concentration-time graphs, tangents, and a clock reaction method.
Physical Chemistry · Required Practicals · 3.1.9 Rate Equations · Required Practical 7: Measuring the rate of reaction by an initial rate method · Required Practical 3: Investigation of how the rate of a reaction changes
- Question 2 12 marks
State equations, observations, and bonding explanations for Period 3 oxides, and describe an experimental method to determine melting point and assess purity.
Inorganic Chemistry · Physical Chemistry · Required Practicals · 3.2.4 Properties of Period 3 Elements and Their Oxides · 3.1.3 Bonding · Required Practical 12: Separation and purification techniques · 3.1.2 Amount of Substance
- Question 3 13 marks
Calculate the percentage yield of cyclohexene from the dehydration of cyclohexanol, and explain the purification, chromatography, and spectroscopy techniques used in the preparation.
Physical Chemistry · Organic Chemistry · Required Practicals · 3.1.2 Amount of Substance · 3.3.4 Alkenes · 3.3.5 Alcohols · 3.3.6 Organic Analysis · 3.3.16 Chromatography · Required Practical 5: Distillation of a product from a reaction · Required Practical 10: Preparation of a pure organic liquid
- Question 4 16 marks
Plot a cooling curve to find the temperature rise for a neutralisation reaction, evaluate uncertainties and heat loss, calculate the enthalpy of neutralisation between ethanedioic acid and potassium hydroxide, and explain the difference in enthalpy compared to a strong acid.
Physical Chemistry · Required Practicals · 3.1.4 Energetics · 3.1.2 Amount of Substance · 3.1.12 Acids and Bases · Required Practical 2: Measurement of an enthalpy change
- Question 5 1 mark
Identify which formula can represent both the empirical and molecular formula of a stable compound.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 6 1 mark
Identify the diagram that shows the correct bonding and bond polarity in a molecule of oxygen difluoride (OF2).
Physical Chemistry · 3.1.3 Bonding
- Question 7 1 mark
Deduce the conclusion about atomic structure that can be drawn from alpha particles passing straight through a thin sheet of gold.
Physical Chemistry · 3.1.1 Atomic Structure
- Question 8 1 mark
Identify the conclusion that can be drawn from the back-scattering of alpha particles fired at a thin gold sheet.
Physical Chemistry · 3.1.1 Atomic Structure
- Question 9 1 mark
Identify which reaction equation represents a free-radical termination step.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.2 Alkanes · 3.3.3 Halogenoalkanes
- Question 10 1 mark
Identify the correct reaction and mechanism statement for a cycloalkene derivative containing bromo and aldehyde functional groups.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.3 Halogenoalkanes · 3.3.4 Alkenes · 3.3.8 Aldehydes and Ketones
- Question 11 1 mark
Identify which statement applies to both 2-methylbutan-1-ol and 2-methylbutan-2-ol.
Organic Chemistry · 3.3.4 Alkenes · 3.3.5 Alcohols · 3.3.9 Carboxylic Acids and Derivatives · 3.3.15 Nuclear Magnetic Resonance Spectroscopy
- Question 12 1 mark
Identify a possible rate equation for a reaction given the effect of doubling all reactant and catalyst concentrations on the reaction rate.
Physical Chemistry · 3.1.9 Rate Equations
- Question 13 1 mark
Identify which rate against concentration graph represents a reaction that is second order with respect to reactant X.
Physical Chemistry · 3.1.9 Rate Equations
- Question 14 1 mark
Identify the equation representing the standard enthalpy of atomisation of iodine.
Physical Chemistry · 3.1.8 Thermodynamics
- Question 15 1 mark
Identify the structure formed by aspartic acid in solution at pH 12.
Organic Chemistry · 3.3.13 Amino Acids, Proteins and DNA
- Question 16 1 mark
Determine the number of peaks in the 13C NMR spectrum of 1,4-dimethylbenzene.
Organic Chemistry · 3.3.15 Nuclear Magnetic Resonance Spectroscopy
- Question 17 1 mark
Identify which of the given Period 3 elements has the highest melting point.
Inorganic Chemistry · Physical Chemistry · 3.2.1 Periodicity · 3.1.3 Bonding
- Question 18 1 mark
Identify the products of the reaction between chlorine and cold, dilute aqueous sodium hydroxide.
Inorganic Chemistry · 3.2.3 Group 7(17), The Halogens
- Question 19 1 mark
Identify the products formed when magnesium reacts with steam.
Inorganic Chemistry · 3.2.2 Group 2, The Alkaline Earth Metals
- Question 20 1 mark
Identify the observation that confirms ammonia gas is released when solid ammonium chloride is warmed with solid calcium hydroxide.
Inorganic Chemistry · Required Practicals · Required Practical 4: Carry out simple test-tube reactions to identify Cations and Anions
- Question 21 1 mark
Identify the monomer or pair of monomers used to form the specified condensation polymer repeating unit.
Organic Chemistry · 3.3.12 Polymers · 3.3.9 Carboxylic Acids and Derivatives
- Question 22 1 mark
Identify the statement explaining why plastics made from a given polyester chain only soften at high temperatures.
Organic Chemistry · Physical Chemistry · 3.1.3 Bonding · 3.3.12 Polymers
- Question 23 1 mark
Identify the role of nitric acid in the reaction generating the nitronium ion for the nitration of benzene.
Organic Chemistry · Physical Chemistry · 3.3.10 Aromatic Chemistry · 3.1.12 Acids and Bases
- Question 24 1 mark
Identify the correct order of decreasing pH for equimolar aqueous solutions of ammonia, ethylamine, and phenylamine.
Organic Chemistry · Physical Chemistry · 3.3.11 Amines · 3.1.12 Acids and Bases
- Question 25 1 mark
Identify which Period 3 element forms an ionic oxide that reacts with strong alkalis.
Inorganic Chemistry · 3.2.4 Properties of Period 3 Elements and Their Oxides
- Question 26 1 mark
Identify the correct thermodynamic statement regarding a ligand substitution reaction involving the chelate effect in a cobalt(II) complex.
Inorganic Chemistry · Physical Chemistry · 3.2.5 Transition Metals · 3.1.8 Thermodynamics
- Question 27 1 mark
Identify which transition metal complex exists as optical isomers from the given formulas.
Inorganic Chemistry · 3.2.5 Transition Metals
- Question 28 1 mark
Determine how many structural isomers with the molecular formula C5H10O react with Tollens' reagent.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.6 Organic Analysis · 3.3.8 Aldehydes and Ketones
- Question 29 1 mark
Identify which metal ion cannot catalyse the reaction between iodide and peroxodisulfate using standard electrode potential data.
Inorganic Chemistry · Physical Chemistry · 3.2.5 Transition Metals · 3.1.11 Electrode Potentials
- Question 30 1 mark
Identify which species has a shape influenced by the presence of one or more lone pairs of electrons around the central atom.
Physical Chemistry · 3.1.3 Bonding
- Question 31 1 mark
Identify which pair of equimolar solutions produces the greatest mass of solid precipitate when equal volumes are mixed.
Inorganic Chemistry · Physical Chemistry · 3.2.2 Group 2, The Alkaline Earth Metals · 3.1.2 Amount of Substance
- Question 32 1 mark
Identify which indicator is suitable for the titration of the weak base methylamine with hydrochloric acid.
Physical Chemistry · Organic Chemistry · 3.1.12 Acids and Bases · 3.3.11 Amines
- Question 33 1 mark
Identify which ionic compound has the greatest percentage difference between experimental lattice enthalpy from a Born–Haber cycle and theoretical lattice enthalpy from a perfect ionic model.
Physical Chemistry · 3.1.8 Thermodynamics · 3.1.3 Bonding
- Question 34 1 mark
Determine which combination of temperature and pressure gives the greatest equilibrium yield of products for an endothermic gas-phase reaction.
Physical Chemistry · 3.1.6 Chemical Equilibria, Le Chatelier's Principle and Kc