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CAIE A-Level Chemistry AS Organic Conventions and Functional Groups

Practise reading syllabus organic notation and recognising functional groups from displayed, structural or skeletal formulae.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • interpret X as a halogen and R or R′ as alkyl groups or hydrogen in generic structures
  • identify each functional group from its defining atom sequence rather than from the compound name alone
  • distinguish aldehyde, ketone, acid and ester carbonyl environments in multifunctional molecules

Covered syllabus points

Reference—AS organic notation conventionsReference—AS organic functional groups

AS organic chemistry conventions and functional group reference question 1

[Maximum number: 1]

Compound V is a liquid.
V contains 77.2 % carbon, 11.4 % hydrogen and 11.4 % oxygen by mass.
V has a relative molecular mass of 280 .

W, X and Y have the same molecular formula, C5H10O\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}.

W, X and Y are added separately to different reagents. Observations for these reactions are described in Table 4.1.

Table 4.1

Table 4.1

W, X and Y each contain a common functional group.

Name the functional group that is present in all three compounds.

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