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Question

Arrange the following compounds in increasing order of boiling point.

Propan-1-olButan-1-ol
III
Butan-2-olPentan-1-ol
III IV

A
I<III<II<IV
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B
II<III<IV<I
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C
II<IV<III<VI
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D
III<I<II<IV
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Solution

The correct option is B I<III<II<IV
Boiling point increases with increase in molecular mass of alcohols. Further among isomers, 1o alcohols have higher boiling points than 2o alcohols. Therefore, increasing order of boiling points is
Propan-1-ol < butan-2-ol < butan-1-ol < pentan-1-ol.
I III II IV

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