2019 - Q1
Which structural formula best represents pentan - 2- one?
2019 - Q21 (2 marks)
(b) The structural formulae for two compounds are shown below.
Why are these two compounds classed as functional group isomers?
2021 - Q24 (4 marks)
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)
A bottle labelled ‘propanol’ contains one of two isomers of propanol.
(a) Draw the TWO isomers of propanol. (2 marks)
(b) refer to 8.2 (Analysis of Organic compounds)
(c) refer to 7.5 Reactions involving hydrocarbons)
2019 - Q10
Which class of organic compound must contain at least three carbon atoms?
A. Aldehydes
B. Alkenes
C. Carboxylic acids
D. Ketones
2020 - Q6
The structure of a compound is shown.
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
The structures of four isomers are shown.
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
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
The structural formula of a compound is given.
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
2023 - Q8
