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Question

Arrange the following compounds in increasing order of boiling points . Propan-1-ol , butan-1-ol , butan-2-ol, pentan-1-ol.

A
Propan-1-ol, butan-2-ol,butan-1-ol ,pentan-1-ol
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B
Propan-1-ol, butan-1-ol,butan-2-ol ,pentan-1-ol
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C
Pentan-1-ol , butan-2-ol , butan-1-ol , propan -1-ol
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D
Pentan-1-ol , butan-1-ol , butan-2-ol , propan -1-ol
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Solution

The correct option is A Propan-1-ol, butan-2-ol,butan-1-ol ,pentan-1-ol
The boiling point increases as the moleculer mass of the alcohol increases. Further, among isomeric alcohols, 10 alcohols have higher boiling points than 20 alcohols.

Therefore the b.p.t increases in the order: propan-1-ol < butan-2-ol < butan-1-ol < pentan-1-ol.

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