Question

Out of o-nitrophenol and p-nitrophenol which has higher boiling point and why

Answer 1

O-nitrophenol has lower boiling point. It forms "Intramolecular Hydrogen bonding" between the H of -OH group and O of -NO2 group of single molecule. So any one molecule does not create any strong bonding with another one.

P-nitrophenol creates "Inter moleculer Hydrogen bonding" and posses strong attraction between two molecules. So, it is hard to seperate two molecules of P-nitrophenol than that of O-nitrophenol.

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