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Question

Arrange the given set of compounds in order of increasing boiling point:
I. 1-chloropropane
II. Isopropyl chloride
III. 1-chlorobutane

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

The correct option is B II<I<III
Alkyl halides containing same halide, the boiling point increases with increase in alkyl chain. So 1-chlorobutane is having more boiling point than 1-chloro propane. Also the boiling point decreases with increase in branching in the chain. So the boiling point of 1-chloropropane is greater than isopropyl chloride. Hence the correct order of boiling points is:
Isopropylchloride<1chloropropane<1chlorobutane.
Hence option C is correct.

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