OCR A-Level Chemistry Synthesis and analytical techniques (02), June 2024
Every question from OCR A-Level Chemistry Synthesis and analytical techniques (02), June 2024 (H432): 24 questions, 100 marks, each with its mark scheme and topic.
- Question 1 1 mark
Identify the electrostatic attraction present in a covalent bond from multiple choice options.
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 2 1 mark
Identify why hydrogen reacts more readily with alkenes than with alkanes from multiple-choice options concerning sigma and pi bonds.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 3 1 mark
Identify the colour of the precipitate formed when iodoalkanes react with aqueous silver nitrate in ethanol.
Module 4: Core organic chemistry · Practical Activity Groups · PAG 7: Qualitative analysis of organic functional groups · 4.2 Alcohols, haloalkanes and analysis
- Question 4 1 mark
Identify the correct shapes around carbon atoms x and y in the structure of but-1-ene.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · 2.2 Electrons, bonding and structure · 4.1 Basic concepts and hydrocarbons
- Question 5 1 mark
Identify the pair of reagents that tests for both functional groups present in geraniol.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis · 6.3 Analysis
- Question 6 1 mark
Calculate the volume of oxygen gas needed at RTP for the complete combustion of a given mass of an alcohol using its balanced equation and molar mass.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 7 1 mark
Identify the valid scientific reason for global warming from the given statements about greenhouse gases and radiation.
Module 6: Organic chemistry and analysis · 6.3 Analysis
- Question 8 1 mark
Identify the correct initiation step for the breakdown of ozone by the CFC CCl2F2 in the upper atmosphere
Module 4: Core organic chemistry · Module 3: Periodic table and energy · 3.1 The periodic table · 4.1 Basic concepts and hydrocarbons
- Question 9 1 mark
Identify which given chemical structure represents a secondary amide.
Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis
- Question 10 1 mark
Calculate the concentration of ethylammonium chloride formed when 1.35 g of ethylamine gas reacts with 20 cm3 of 2.0 mol dm-3 hydrochloric acid.
Module 2: Foundations in chemistry · Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis · 2.1 Atoms and reactions
- Question 11 1 mark
Identify which given compound could have produced the provided infrared spectrum.
Module 6: Organic chemistry and analysis · Module 4: Core organic chemistry · 6.3 Analysis · 4.2 Alcohols, haloalkanes and analysis
- Question 12 1 mark
Identify the other product formed when 1,6-diaminohexane reacts with hexanedioyl dichloride to form a polyamide.
Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis
- Question 13 1 mark
Interpret a gas chromatogram of a three-component mixture to identify true statements regarding retention time, peak area proportions, and composition.
Module 6: Organic chemistry and analysis · 6.3 Analysis
- Question 14 1 mark
Identify which of the given organic compounds would produce a carbon-13 NMR spectrum with exactly 2 peaks.
Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.3 Analysis
- Question 15 1 mark
Identify the correct statements regarding the disposal and properties of poly(chloroethene) from a given list of three options.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis · 4.1 Basic concepts and hydrocarbons
- Question 16 6 marks
Identify features, name, and explain stereoisomerism of five hydrocarbon structures labeled A to E.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 6.1 Aromatic compounds, carbonyls and acids
- Question 17 8 marks
Identify reagents, catalysts, and organic products for the elimination, oxidation, substitution, and esterification reactions of four structural isomers of butan-1-ol.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.2 Alcohols, haloalkanes and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis
- Question 18 14 marks
Write the equation, mechanism, and limitations for the free radical substitution of alkanes, and complete a reaction flowchart for haloalkane conversions involving amines, alcohols, nitriles, and carboxylic acids.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis
- Question 19 6 marks
Describe one addition reaction of an alkene and one addition reaction of a carbonyl compound, including reagents and reaction mechanisms.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 6.1 Aromatic compounds, carbonyls and acids
- Question 20 13 marks
Explain hydrogen bonding in methanoic acid, name ester F, write equations for its synthesis, draw polyester monomers, and draw products of alkaline hydrolysis of a compound containing an ester and amide group.
Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis
- Question 21 14 marks
Outline the mechanism for the Friedel-Crafts alkylation of benzene with chloroethane and explain the directing and activating effects in the electrophilic substitution of substituted aromatic compounds.
Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids
- Question 22 6 marks
Calculate the molar mass of a polymer formed from 500 molecules of a given alpha-amino acid, and draw 2 repeat units of addition and condensation polymers for a bifunctional monomer.
Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis
- Question 23 12 marks
Synthesize compound H from compound G using reflux, write neutralization equations, evaluate a reagent substitution, calculate percentage yield, and describe the purification of the liquid product.
Module 6: Organic chemistry and analysis · Practical Activity Groups · Module 2: Foundations in chemistry · PAG 5: Synthesis of an organic liquid · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis · 2.1 Atoms and reactions
- Question 24 6 marks
Determine the structure of unknown organic compound J using elemental analysis, mass spectrometry, IR spectroscopy, and proton NMR spectroscopy data.
Module 2: Foundations in chemistry · Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.3 Analysis · 2.1 Atoms and reactions