In organic chemistry, functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. They determine the reactivity and behavior of organic compounds. Consider the following compounds:
Compound 1: CH3-CH2-OH (Ethanol)
Compound 2: CH3-COOH (Acetic Acid)
Compound 3: CH3-NH2 (Methylamine)
Based on your knowledge of functional groups, which of these compounds contains a hydroxyl group?