A-LevelChemistryHydroxy compounds9701/12 · Oct/Nov 2014 · Q91 Mark

Methylpropan-1-ol and butan-1-ol are structural isomers. Methylpropan-1-ol has a lower boiling point. Which statement explains why the boiling point of methylpropan-1-ol is lower than that of butan-1-ol?

AMethylpropan-1-ol cannot form hydrogen bonds.

BMethylpropan-1-ol has weaker covalent bonds than butan-1-ol.

CMethylpropan-1-ol has weaker van der Waals' forces than butan-1-ol.

DMethylpropan-1-ol molecules have more surface area than butan-1-ol molecules.

✓ Correct answer

C: Methylpropan-1-ol has weaker van der Waals' forces than butan-1-ol.

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Topic: Hydroxy compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2014 Paper 1 Variant 2, question 9.

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