2019 - Q1
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Which structural formula best represents pentan - 2- one?
2019 - Q21 (2 marks)
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(b) The structural formulae for two compounds are shown below.
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Why are these two compounds classed as functional group isomers?
2021 - Q24 (4 marks)
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A straight-chained alkane has a molar mass of 72.146 g mol–1.
Provide the structural formulae for this alkane and all other isomers of it in the space provided.
Name these molecules using IUPAC conventions
2022 - Q27 (7 marks)
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A bottle labelled ‘propanol’ contains one of two isomers of propanol.
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(a) Draw the TWO isomers of propanol. (2 marks)
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(b) refer to 8.2 (Analysis of Organic compounds)
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(c) refer to 7.5 Reactions involving hydrocarbons)
2019 - Q10
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Which class of organic compound must contain at least three carbon atoms?
A. Aldehydes
B. Alkenes
C. Carboxylic acids
D. Ketones
2020 - Q6
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The structure of a compound is shown.
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What is the preferred IUPAC name of this compound?
A. 1,1,1-tribromo-2-fluoropropan-3-ol
B. 2-fluoro-3,3,3-tribromopropan-1-ol
C. 2-fluoro-1,1,1-tribromopropan-3-ol
D. 3,3,3-tribromo-2-fluoropropan-1-ol
2020 - Q7
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The structures of four isomers are shown.
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Which statement is correct?
A. Compounds 1 and 2 are chain isomers.
B. Compounds 1 and 4 are chain isomers.
C. Compounds 2 and 3 are functional group isomers.
D. Compounds 2 and 4 are positional isomers.
2021 - Q3
2021 - Q7
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The name 2-ethyl-3-chlorohexane does not follow IUPAC conventions. What is the systematic name of this organic compound?
A. 3-chloro-2-ethylhexane
B. 4-chloro-3-methylheptane
C. 4-chloro-5-ethylhexane
D. 5-methyl-4-chloroheptane
2022 - Q9
2023 - Q3
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The structural formula of a compound is given.
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What is the preferred IUPAC name of this compound?
A. Pent-2-ene
B. Pent-2-yne
C. Pent-3-ene
D. Pent-3-yne
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2023 - Q8
