Edexcel A-Level Chemistry Paper 2, June 2025
Every question from Edexcel A-Level Chemistry Paper 2, June 2025 (9CH0): 9 questions, 90 marks, each with its mark scheme and topic.
- Question 1 2 marks
Identify which molecule does not have a molecular ion peak at m/z = 74, and determine which fragment peak distinguishes propanal from propanone in mass spectrometry.
Organic Chemistry · Topic 7: Modern Analytical Techniques I · Topic 19: Modern Analytical Techniques II
- Question 2 8 marks
Explain differences in physical properties and boiling temperatures based on intermolecular forces, molecular shapes, and dipole moments.
Physical Chemistry · Topic 2: Bonding and Structure
- Question 3 2 marks
Calculate the atom economy for the alkaline hydrolysis of stearin to form sodium stearate, and state the IUPAC name for glycerol.
Physical Chemistry · Organic Chemistry · Topic 5: Formulae, Equations and Amounts of Substance · Topic 6: Organic Chemistry I · Topic 17: Organic Chemistry II
- Question 4 11 marks
Perform photon energy calculations related to bond breaking in free-radical chlorination, write radical structures, explain isomer yields, and draw dot-and-cross diagrams.
Organic Chemistry · Physical Chemistry · Topic 6: Organic Chemistry I · Topic 2: Bonding and Structure · Topic 8: Energetics I
- Question 5 14 marks
Calculate reacting volumes and gas amounts, explain reaction rates using collision theory and Maxwell–Boltzmann distributions, and determine an initial rate from experimental data.
Physical Chemistry · Topic 5: Formulae, Equations and Amounts of Substance · Topic 9: Kinetics I · Topic 16: Kinetics II
- Question 6 8 marks
Describe chemical tests to distinguish benzaldehyde, phenylethanone, and benzoic acid, and answer questions on the reaction of 2,4-DNPH with aldehydes.
Organic Chemistry · Topic 17: Organic Chemistry II
- Question 7 17 marks
Assess methods for preparing butylamine, write an equation for reducing 1,3-dinitrobenzene, explain the relative basicities of aromatic and aliphatic diamines using pKb data, and add curly arrows to an addition-elimination mechanism.
Organic Chemistry · Topic 6: Organic Chemistry I · Topic 18: Organic Chemistry III
- Question 8 15 marks
Deduce the formula, stereoisomers, reactions, benzene bonding models, solubility, and 13C NMR peaks for anethole and related compounds.
Organic Chemistry · Physical Chemistry · Topic 5: Formulae, Equations and Amounts of Substance · Topic 6: Organic Chemistry I · Topic 18: Organic Chemistry III · Topic 19: Modern Analytical Techniques II · Topic 2: Bonding and Structure
- Question 9 13 marks
Use Arrhenius data to determine activation energy from a graph, deduce reaction order from rate constant units, and draw the SN1 mechanism for halogenoalkane hydrolysis.
Physical Chemistry · Organic Chemistry · Topic 16: Kinetics II · Topic 6: Organic Chemistry I