Arrange each set of compounds in order of increasing boiling points.
(2) 1-chloropropane, Isopropyl chloride, 1-chlorobutane.

Explanation

For alkyl halides containing the same halogen, the boiling point increases as the size of alkyl group increases. So, boiling point of 1-chlorobutane is greater than those of 1-chloropropane and isopropyl chloride `(CH_(3)-CHClCH_(3))`. But for isomeric alkyl halides, boiling point decreases as branching increases. so, boiling point of 1-chloropropane is greater than that of isopropyl chloride. Thus boiling increases in the sequence: Isopropyl chloride < 1-chloropropane < 1-chlorobutane.