OCR A-Level Chemistry Synthesis and analytical techniques (02), November 2020
Every question from OCR A-Level Chemistry Synthesis and analytical techniques (02), November 2020 (H432): 22 questions, 100 marks, each with its mark scheme and topic.
- Question 1 1 mark
Identify the correct IUPAC name including E/Z stereoisomerism for the given bromoalkene compound.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 2 1 mark
Identify the correct statement regarding chemical bonds in organic molecules such as ethene and ethane.
Module 4: Core organic chemistry · Module 2: Foundations in chemistry · 4.1 Basic concepts and hydrocarbons · 2.2 Electrons, bonding and structure
- Question 3 1 mark
Identify which of the given reagents will not react with HOCH2CH2CH2COOH.
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 4 1 mark
Identify which compound can be refluxed with acidified potassium dichromate(VI) to form an organic product with molecular formula C5H8O2.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.2 Alcohols, haloalkanes and analysis · 6.1 Aromatic compounds, carbonyls and acids
- Question 5 1 mark
Identify which chemical structure shows a section of poly(propene)
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 6 1 mark
Identify which alcohol reacts with an acid catalyst to form a mixture of stereoisomers
Module 4: Core organic chemistry · 4.2 Alcohols, haloalkanes and analysis
- Question 7 1 mark
Identify which of the given reagents reacts with both ethanoic acid and phenol.
Module 6: Organic chemistry and analysis · Module 4: Core organic chemistry · 6.1 Aromatic compounds, carbonyls and acids · 4.2 Alcohols, haloalkanes and analysis
- Question 8 1 mark
Identify which isomer of C6H12O2 produces the smallest number of peaks in its 13C NMR spectrum.
Module 6: Organic chemistry and analysis · 6.3 Analysis
- Question 9 1 mark
Identify the correct structural formula for ethyl 3-methylbutanoate from the given multiple-choice options.
Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids
- Question 10 1 mark
Identify the number of alicyclic structural isomers of C5H10.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 11 1 mark
Determine the empirical formula of a hydrocarbon given the mass of the hydrocarbon and the mass of carbon dioxide produced upon complete combustion.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 12 1 mark
Determine the molecular formula of the given steroid molecule containing an aromatic ring and two hydroxyl groups.
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 13 1 mark
Identify the correct statements regarding gas chromatography involving retention times, peak areas, and calibration curves
Module 6: Organic chemistry and analysis · 6.3 Analysis
- Question 14 1 mark
Identify which of the given reactions produce propan-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 15 1 mark
Identify which of the given compounds can be prepared by reacting benzene with an acyl chloride in the presence of a halogen carrier.
Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis
- Question 16 9 marks
Name the halogenated product of hydrocarbon A, explain stereoisomerism, draw 3D diagrams of stereoisomers, complete the radical substitution mechanism table, and state limitations of radical substitution.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 6.2 Nitrogen compounds, polymers and synthesis
- Question 17 20 marks
Analyze the reactions, synthesis pathways, spectroscopy, and mechanisms involving unsaturated hydrocarbon compounds B and C (mesitylene) containing nine carbon atoms.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis · 6.3 Analysis · 4.1 Basic concepts and hydrocarbons
- Question 18 11 marks
Oxidise a diol to a dicarboxylic acid, explain its water solubility via hydrogen bonding, draw the repeat unit of the resulting polyester, explain its biodegradability, and complete the equation for forming its diacyl dichloride.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis · 4.2 Alcohols, haloalkanes and analysis
- Question 19 14 marks
Analyze carbonyl compounds F and G regarding homologous series, chemical tests for functional groups, nucleophilic addition mechanism, and heterolytic fission.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis
- Question 20 8 marks
Calculate the mass of cyclopentanol needed to prepare 4.00 g of cyclopentene given a 64.0% percentage yield, describe the purification of the organic layer, and explain the IR spectrum of the product.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · Practical Activity Groups · 4.2 Alcohols, haloalkanes and analysis · 6.3 Analysis · PAG 5: Synthesis of an organic liquid · PAG 7: Qualitative analysis of organic functional groups
- Question 21 15 marks
Synthesise an organic nitrogen salt from propanone, identify functional groups in aspartame, draw its acid hydrolysis products, and calculate the safe number of cans of diet drink that can be consumed.
Module 6: Organic chemistry and analysis · Module 2: Foundations in chemistry · 6.1 Aromatic compounds, carbonyls and acids · 6.2 Nitrogen compounds, polymers and synthesis · 2.1 Atoms and reactions
- Question 22 8 marks
Explain the use of two deuterated compounds in NMR spectroscopy and determine the structure of organic compound I using analytical data including elemental analysis, molecular ion mass, IR, and proton NMR spectra.
Module 6: Organic chemistry and analysis · 6.3 Analysis