OCR A-Level Chemistry Synthesis and analytical techniques (02), June 2017
Every question from OCR A-Level Chemistry Synthesis and analytical techniques (02), June 2017 (H432): 21 questions, 100 marks, each with its mark scheme and topic.
- Question 1 1 mark
Identify the aqueous reagent used to compare the rates of hydrolysis of 1-chloropropane and 1-bromopropane.
Module 4: Core organic chemistry · Practical Activity Groups · 4.2 Alcohols, haloalkanes and analysis · PAG 7: Qualitative analysis of organic functional groups
- Question 2 1 mark
Identify the correct description of the given organic molecule as alicyclic and saturated, aromatic, or unsaturated.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 3 1 mark
Deduce the molecular formula of an organic compound given the volumes of carbon dioxide and water vapour produced upon its complete combustion.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · 2.1 Atoms and reactions · 4.1 Basic concepts and hydrocarbons
- Question 4 1 mark
Identify which of the four given alkene molecules is a Z-isomer.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 5 1 mark
Identify which type of reaction has the greatest atom economy among substitution, hydrolysis, elimination, and addition.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · 2.1 Atoms and reactions · 4.1 Basic concepts and hydrocarbons
- Question 6 1 mark
Identify which labelled atom in an amino acid structure has a trigonal planar arrangement of bonds around it
Module 2: Foundations in chemistry · Module 6: Organic chemistry and analysis · 2.2 Electrons, bonding and structure · 6.2 Nitrogen compounds, polymers and synthesis
- Question 7 1 mark
Identify which given molecular structure represents a secondary amine
Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis
- Question 8 1 mark
Determine the number of chiral centres present in the given organic molecule.
Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis
- Question 9 1 mark
Determine the molecular formula of a given branched cycloalkane structure from multiple-choice options.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 10 1 mark
Identify which of the four given compounds (amide, carboxylic acid, ester, acyl chloride) produces the most acidic solution when equal amounts are added to water
Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids
- Question 11 1 mark
Determine the number of peaks observed in the 1H NMR spectrum of pentanedioic acid.
Module 6: Organic chemistry and analysis · 6.3 Analysis
- Question 12 1 mark
Calculate the number of molecules of water formed when 0.1 mol of HOOCCH2COOH is reacted with 0.1 mol of aqueous NaOH.
Module 2: Foundations in chemistry · Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 2.1 Atoms and reactions
- Question 13 1 mark
Identify the reagents used to prepare CH3CH2CONHCH3 from the given multiple-choice options.
Module 6: Organic chemistry and analysis · 6.2 Nitrogen compounds, polymers and synthesis
- Question 14 1 mark
Identify which radicals are present in the mechanism of the radical substitution reaction between ethane and chlorine to form chloroethane.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 15 1 mark
Identify which of the given compounds are structural isomers of C6H12O2.
Module 6: Organic chemistry and analysis · Module 4: Core organic chemistry · 6.1 Aromatic compounds, carbonyls and acids · 4.1 Basic concepts and hydrocarbons
- Question 16 20 marks
Answer questions on unsaturated hydrocarbons involving isomers, stereoisomerism, pi-bonds, electrophilic addition mechanisms, and calculations involving amounts of substance.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · 2.1 Atoms and reactions · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis
- Question 17 21 marks
Outline the nitration of benzoic acid, calculate its percentage yield and purity, explain the relative ease of nitration of phenol, benzene and benzoic acid, and complete a multi-step organic synthesis of 3-bromophenylamine starting from nitrobenzene.
Module 6: Organic chemistry and analysis · Practical Activity Groups · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis · PAG 6: Synthesis of an organic solid
- Question 18 14 marks
Outline the nucleophilic substitution mechanism for 1-chloropropane with cyanide, complete a synthetic reaction flowchart from methanal to amine and hydroxycarboxylic acid derivatives, explain amine basicity, and analyze polyester and polyamide structures including monomer identification and repeat unit calculations.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 2.1 Atoms and reactions · 4.2 Alcohols, haloalkanes and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis
- Question 19 15 marks
Construct combustion and oxidation equations, explain hydrogen bonding and solubility differences of alcohols, and complete an organic reaction flowchart involving carbonyl reduction, substitution, and elimination.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 4.2 Alcohols, haloalkanes and analysis
- Question 20 9 marks
Determine the molecular formula, functional groups, and structure of a naturally occurring aromatic compound using percentage composition, mass spectrometry, qualitative test results, and carbon-13 NMR spectroscopy.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · Module 2: Foundations in chemistry · 6.1 Aromatic compounds, carbonyls and acids · 6.3 Analysis · 2.1 Atoms and reactions · 4.2 Alcohols, haloalkanes and analysis
- Question 21 6 marks
Deduce the structure of an organic compound L containing carbon, hydrogen, and oxygen only using its 1H NMR and infrared spectra after reflux with hydrochloric acid.
Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.3 Analysis