AQA A-Level Chemistry Paper 2, 2018
Every question from AQA A-Level Chemistry Paper 2, 2018: 11 questions, 105 marks, each with its mark scheme and topic.
- Question 1 10 marks
Write equations and conditions for alkane combustion, catalytic cracking, free-radical chlorination of butane, and ozone depletion by CFCs.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.2 Alkanes · 3.3.3 Halogenoalkanes
- Question 2 7 marks
Deduce the IUPAC name, nucleophilic substitution mechanism details, and structures of intermediate compounds in an organic synthesis pathway starting from a bromoalcohol.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.3 Halogenoalkanes · 3.3.5 Alcohols · 3.3.6 Organic Analysis · 3.3.8 Aldehydes and Ketones
- Question 3 16 marks
Answer a series of questions on the oxidation of propan-1-ol, testing for propanoic acid, calorimetry calculation of combustion of ethanol, mechanism of dehydration of pentan-2-ol, and stereoisomerism.
Physical Chemistry · Organic Chemistry · Required Practicals · 3.1.3 Bonding · 3.1.4 Energetics · 3.3.1 Introduction to Organic Chemistry · 3.3.5 Alcohols · 3.3.6 Organic Analysis · Required Practical 2: Measurement of an enthalpy change · Required Practical 5: Distillation of a product from a reaction · Required Practical 6: Tests for alcohol, aldehyde, alkene and carboxylic acid
- Question 4 13 marks
Calculate equilibrium amounts of B, C, and D, state the Kc expression and units, calculate the equilibrium concentration of A, and justify the effect of dilution on the amount of A.
Physical Chemistry · 3.1.2 Amount of Substance · 3.1.6 Chemical Equilibria, Le Chatelier's Principle and Kc
- Question 5 14 marks
Use initial rate data to calculate the rate constant k and complete missing values, then complete temperature data and plot an Arrhenius graph to determine the activation energy of the reaction.
Physical Chemistry · 3.1.5 Kinetics · 3.1.9 Rate Equations
- Question 6 9 marks
Explain the bonding, shape, and stability of benzene compared to cyclohexa-1,3,5-triene, and estimate the enthalpy of hydrogenation of cyclohexa-1,3-diene.
Organic Chemistry · Physical Chemistry · 3.3.10 Aromatic Chemistry · 3.1.4 Energetics
- Question 7 10 marks
Give an equation and mechanism for the reaction of propanoyl chloride with benzene, then name the alcohol product of reduction, and describe its reaction with ethanoyl chloride.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.8 Aldehydes and Ketones · 3.3.9 Carboxylic Acids and Derivatives · 3.3.10 Aromatic Chemistry
- Question 8 6 marks
Explain hydrogen bond formation in beta-pleated sheets, draw a disulfide bridge between cysteine residues, identify protein tertiary/quaternary structure, and draw the zwitterion of an alanine-serine dipeptide.
Organic Chemistry · Physical Chemistry · 3.3.13 Amino Acids, Proteins and DNA · 3.1.3 Bonding
- Question 9 4 marks
Deduce complementary base pairings, count the total number of hydrogen bonds in a DNA fragment, and complete the structure of a nucleotide containing base A.
Organic Chemistry · 3.3.13 Amino Acids, Proteins and DNA
- Question 10 10 marks
Identify compounds from infrared spectra, draw skeletal isomers of secondary amines, compare amine synthesis routes, and give equations and explanations for reactions of amines and phenylamine.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.3 Halogenoalkanes · 3.3.6 Organic Analysis · 3.3.10 Aromatic Chemistry · 3.3.11 Amines
- Question 11 6 marks
Deduce the NMR spectra and draw structures of various isomeric diamines with formula C6H16N2, including the monomer for nylon 6,6 and symmetrical primary/tertiary diamines.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.11 Amines · 3.3.12 Polymers · 3.3.15 Nuclear Magnetic Resonance Spectroscopy