(II) $C H_{3} C H_{2} C H_{2} C H_{2} B r$

Arrange the following compounds in increasing order of their boiling points:

(II) < (I) < (III)

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(I) < (II) < (III)

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(III) < (I) < (II)

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(III) < (II) < (I)

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Solution

The correct option is B (III) < (I) < (II)
More the surface area more will be boiling point i.e. branching decreases boiling point because surface area decreases due to branching which result in decreases in attraction.

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