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

I I < I I I < I

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I < I I < I I I

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I I < I < I I I

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I I I < I < I I I

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Solution

The correct option is B $I I < I < I I I$
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:
$I s o p r o p y l c h l o r i d e < 1 - c h l o r o p r o p a n e < 1 - c h l o r o b u t a n e$ .
Hence option C is correct.

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