IUPAC names of a few of the molecules are given below. For the rest, try to solve them by yourself or put up the question in a different link.
CH3 - CH3 Ethane
CH3 - CH2 - CH3 Propane
CH3 - CH = CH2 Propene
CH3 - C =_ CH Propyne
CH3 - CH2 - CH2 - OH 1-Butanol
CH3 - CH2 - CH2 - CH2 - CHO Pentanal
CH3 - CH2 - CH2 - COOH Butanoic acid