1.

The correct order of increasing boiling points is

Answer»

n-butane LT 1-butanol lt n-butyl CHLORIDE lt isobutane
n-butane lt isobutane lt n-butyl chloride lt 1-butanol
isobutane lt n-butyl chloride lt n-butane lt 1-butanol
isobutane lt n-butane lt n-butyl chloride lt 1-butanol.

Solution :Increase in branching decreases SURFACE area of the molecule and therefore, results in lesserVan der Waal's forces . CONSEQUENTLY, isobutane has lesser boiling point than n-butane. Alkyl chlorides have higher boiling than correspondingalkanes because they are polarand stronger dipole-dipole force OPERATE between the molecules of alkylchloride. Alcohols have higher boiling point than corresponding alkyl chloride, becausealcohols molecules are associated through strong H-bonds


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