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Question
Arrange the following compounds in increasing order of boiling point. Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
Options
Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol
Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
Pentan-1-ol, butan-2-ol, butan-1-ol, propan-1-ol
Pentan-1-ol, butan-1-ol, butan-2-ol, propan-1-ol
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Solution
Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol
Explanation:
Boiling point increases with increase in molecular mass of the alcohols. Among isomeric alcohols 1° alcohols have higher boiling points than 2° alcohols. Thus, correct order is:
Propan-1-ol < butan-2-ol < butan-1-ol < pentan-1-ol.
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