what is a functional group in a carbon compound. identify the functional group present in CH3COOH and C2H5OH

An atom or group of atoms which makes an organic compound reactive and decides it's properties is called functional group. CH3COOH has carboxylic Acid, and C2H5OH has Alcohol functional group.

in CH3COOH=CARBOXYLIC ACID

AND IN C2H5OH = ALCOHOL

FUNCTIONAL GROUP DETERMINES THE FAMIY OF CARBON COMPOUNDS