CH3-CO-CH3 : it is Acetone and the simplest ketone.
IUPAC name is Propanone.
it has 3 carbons, it has 2 methyl groups. it is di-methyl - ketone. It is also, propane-2-one
CH3-CH2-OH ethonol, ethyl alcohol.
It is methyl ethyl hydroxide,
IUPAC name is eth (due to 2 carbons) - ane due to single bonded carbons - ol due to (OH) => Ethanol.