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CAIE A-Level Chemistry AS Organic Functional Group Reference

Practise recognising alkene, halogenoalkane, alcohol, carbonyl, acid, ester, amine and nitrile groups.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • identify C=C, C–X, –OH and –CN directly from structural or skeletal formulae
  • distinguish aldehyde –CHO and ketone >C=O from carboxylic acid –COOH and ester –COO–
  • classify primary, secondary or tertiary alcohols and halogenoalkanes from the bonded carbon environment

Reference—AS organic functional groups 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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