4
Question
Predict which of the following compounds will have a lower boiling point than 1-butanal.
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Solution
The correct option is B 1-butene
1-butene will have a lower boiling point than 1-butanal. This is because the molecular weight of 1-butene is lower than that of 1-butanal.
1-butene contains 4 C atoms (apart from H atoms) and 1-butanal contains 4 C atoms and one O atom (apart from H atoms). Lower is the molecular weight, lower will be the boiling point.
1-butanol, 2-butanol and butanoic acid can form intermolecular hydrogen bonds. Hence, they will have a higher boiling point than 1-butanal which cannot form intermolecular hydrogen bonds.
Option D is correct.
1-butene will have a lower boiling point than 1-butanal. This is because the molecular weight of 1-butene is lower than that of 1-butanal.
1-butene contains 4 C atoms (apart from H atoms) and 1-butanal contains 4 C atoms and one O atom (apart from H atoms). Lower is the molecular weight, lower will be the boiling point.
1-butanol, 2-butanol and butanoic acid can form intermolecular hydrogen bonds. Hence, they will have a higher boiling point than 1-butanal which cannot form intermolecular hydrogen bonds.
1-butanol, 2-butanol and butanoic acid can form intermolecular hydrogen bonds. Hence, they will have a higher boiling point than 1-butanal which cannot form intermolecular hydrogen bonds.
Option D is correct.
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