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Answer: Amine does not contain an oxygen atomExplanation:amine is represented by -NH2amide is represented by -CONH2aldehyde is represented by -CHOketone is represented by -COether is represented by -COester is a represented by -COORalcohol is represented by -OHcarboxylic acid is represented by -COOHYou will observe that the only functional group without an oxygen atom is amine with -NH2...