. IUPAC name of CH3COOH is
A: acetic acid
B: formic acid
C: methanoic acid
D: ethanoic acid
The full form of IUPAC is International Union of Pure and Applied Chemistry. Generally IUPAC nomenclature gives us rules through which we can easily write the name of any chemical compounds.
IUPAC name of given compound CH3COOH is acetic acid according to rules assigned by IUPAC nomenclature.
Thus, option A acetic acid is the correct answer.