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Butane has a \( _{--}-_{-}--_{-} \) boiling point to that of propanol.

1. higher
2. similar
3. lower
4. none of these

Correct answer: lower

Solution

Propanol can form hydrogen bonds because it has an O–H group, which greatly increases its boiling point. Butane is nonpolar and only has weak dispersion forces, so its boiling point is lower.

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