CAIE IGCSE Chemistry Organic Nomenclature Questions

Practise naming and drawing organic compounds from carbon-chain length, functional group and position, including alkanes, alkenes, alcohols, acids and esters.

Exam points

choose the chain-length stem and suffix from the main functional group or homologous series
number the chain to give a double bond or functional group the correct lowest position
name esters from the alcohol-derived alkyl group followed by the acid-derived alkanoate

Covered syllabus points

11.2.1—Displayed formulae of: (a) methane and 11.2.2—Type of compound present, given a 11.2.3—Structural and displayed formulae of 11.2.4—Displayed formulae of the unbranched

[Maximum number: 1]

Which diagram shows the displayed formula for the named organic compound?

Figure for Question 11.2 Naming organic compounds question 1 — CAIE IGCSE Chemistry

ethanoic acid

ethene

ethanol

methane

[Maximum number: 5]

Propane, propene, propan-1-ol and propanoic acid are members of different homologous series. Molecules of these substances contain three carbon atoms.

(a)

Name the homologous series to which propanoic acid belongs.

[ 1 ]

(b)

Propan-1-ol has an unbranched isomer.
- Name this isomer.
- Draw the displayed formula of this isomer.

[ 2 ]

(c)

Propanoic acid forms an ester when it reacts with ethanol in the presence of a catalyst.

[ 2 ]

(i)

Draw the displayed formula of this ester.

[ 2 ]

[Maximum number: 2]

The table shows the structures of four hydrocarbons.

Table for Question 11.2 Naming organic compounds question 3 — CAIE IGCSE Chemistry

Draw the structure of an unbranched isomer of compound S. Show all of the atoms and all of the bonds. Name this unbranched isomer of compound S.
structure
name

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Covered syllabus points

11.2 Naming organic compounds question 1

11.2 Naming organic compounds question 2

Question (a)

Question (b)

Question (c)

Question (i)

11.2 Naming organic compounds question 3