has highest boiling point (Given: all has comparable molar mass).

Amide

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Carboxylic acid

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Acyl chloride

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Ketone

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Solution

The correct option is A Amide
Amides has highest boiling point because they have higher hydrogen bonding.
Amide has higher boiling point than carboxylic acid. Because amide will form more hydrogen bonds than carboxylic acid. Carboxylic acid has one hydrogen bond donor atom and two hydrogen bond acceptor atom while amide has two donor and two acceptor atoms.

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