Vinegar contains an organic compound with the following functional group. what type of organic compound is vinegar an example of? the functional group contains a carbonyl group, which is a carbon atom double-bonded to an oxygen atom, bonded to a carbon chain on one side of its carbon atom and a hydroxyl group, which is an oxygen atom single-bonded to a hydrogen atom, on the other side. amine aldehyde carboxylic acid ester

            Option-C (Carboxylic Acid)

Explanation:
                   Vinegar is a solution made up of 95 % water and 5 % Acetic Acid. The structure of Acetic Acid is shown below. Acetic acid belongs to a class of organic compounds called as Caboxylic Acids. The functional group of carboxylic acid contain a carbonyl group bonded to hydroxyl group and an alkyl group (highlighted red in structure).
                    Due to acid nature of this class it can donate the proton bonded to oxygen atom next to carbonyl group and resulting in the formation of resonance stabilized carboxylate ion.

Other examples of Carboxylic acids are,

HCOOH     Formic Acid

CH₃-COOH     Acetic Acid

CH₃-CH₂-COOH     Propionic Acid

CH₃-CH₂-CH₂-COOH     Butanoic Acid

CH₃-CH₂-CH₂-CH₂-COOH     Pentanoic Acid