(a) The organic compound CH3COOH is a carboxylic acid, and its name is ethanoic acid.
(b) Ethanol (CH3CH2OH) should be oxidised to prepare ethanoic acid (CH3COOH).
(c) CH3COOH is physically found in its liquid state.
(d) Advantage of soaps over detergents:
Soaps are biodegradable; therefore, they don't cause water pollution, while a few detergents are not biodegradable, thereby pollute water bodies like rivers and lakes.