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This question is an exact duplicate of:

From NCERT class 12 part 1

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The way I see hydrogen bonding is that it occurs due to intermolecular charge interaction. The more electronegative nitrogen/oxygen due to the inductive effect the respective hydrogen will be more electropositive.

Since the compound cointaining the more electronegative atom (oxygen/nitrogen) has greater respective charges.Then the hydrogen bonding will be greater between the molecules of that compound i.e either the hydrogen bonding between phenol-phenol and aniline-aniline should be greater than phenol-aniline.

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marked as duplicate by a-cyclohexane-molecule, A.K., Jannis Andreska, Gaurang Tandon, NotEvans. Aug 25 '18 at 15:05

This question was marked as an exact duplicate of an existing question.