AQA A-Level Chemistry Paper 2, June 2025
Every question from AQA A-Level Chemistry Paper 2, June 2025 (7405): 9 questions, 105 marks, each with its mark scheme and topic.
- Question 1 12 marks
Identify mechanisms, reagents, conditions, and write equations for the synthesis of 1,2-dichlorobutane via free-radical substitution and elimination-addition pathways.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.2 Alkanes · 3.3.3 Halogenoalkanes · 3.3.4 Alkenes
- Question 2 7 marks
Name an alkene, explain its E/Z isomerism, draw and explain the optical isomerism of a structural isomer, and complete the electrophilic addition mechanism with HBr.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.4 Alkenes · 3.3.7 Optical Isomerism
- Question 3 20 marks
Analyze the structure, properties, synthesis, and mechanisms of various polymers including PVC, nylon 6,6, and nylon 6, and explain the effect of plasticisers using intermolecular forces.
Organic Chemistry · Physical Chemistry · 3.3.12 Polymers · 3.3.4 Alkenes · 3.3.9 Carboxylic Acids and Derivatives · 3.3.1 Introduction to Organic Chemistry · 3.1.3 Bonding · 3.1.2 Amount of Substance
- Question 4 14 marks
Describe the purification of hexanedioic acid by recrystallisation, evaluate errors in a melting point apparatus setup, and assess the sustainability of an alternative synthetic route from glucose.
Organic Chemistry · Required Practicals · 3.3.5 Alcohols · 3.3.14 Organic Synthesis · Required Practical 10: Preparation of a pure organic liquid · Required Practical 12: Separation and purification techniques
- Question 5 11 marks
Write the overall equation for the formation of TNT, calculate the mass of TNT formed given the percentage yield, and outline the mechanism for the nitration of methylbenzene.
Organic Chemistry · Physical Chemistry · 3.3.10 Aromatic Chemistry · 3.1.2 Amount of Substance
- Question 6 5 marks
Explain the choice of D2O as an NMR solvent, deduce the structure of histidine from a tripeptide-copper complex, and identify protein secondary structures.
Organic Chemistry · 3.3.13 Amino Acids, Proteins and DNA · 3.3.15 Nuclear Magnetic Resonance Spectroscopy
- Question 7 12 marks
Deduce the molecular formula and possible structures of hydrocarbon P using high-resolution mass data and spectroscopy, and determine the structure of compound Q using 13C and 1H NMR spectra.
Organic Chemistry · Physical Chemistry · 3.3.15 Nuclear Magnetic Resonance Spectroscopy · 3.3.6 Organic Analysis · 3.3.8 Aldehydes and Ketones · 3.1.2 Amount of Substance
- Question 8 13 marks
Use experimental gas syringe data and the ideal gas equation to find the Mr of a volatile liquid, determine the uncertainty range, and calculate reacting gas volumes for hydrocarbon combustion.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 9 11 marks
Use rate data from the hydrolysis of a bromoalkane to plot an Arrhenius graph, determine the activation energy, and evaluate the reaction mechanism and bond polarity.
Physical Chemistry · Organic Chemistry · 3.1.9 Rate Equations · 3.3.3 Halogenoalkanes · 3.1.3 Bonding