(a)The structures of isomers of butane are:
(i)
Common name:- n-Butane
IUPAC name:- Butane
(ii)
Common name:-iso butane
IUPAC name:- 2-methyl propane
(b) The structures of isomers of Pentane are:
(i)
Common name: n-pentane
IUPAC name:- Pentane
(ii)
Common name:- iso pentane
IUPAC name:- 2-methyl butane
(iii)
Common name- neo pentane
IUPAC name:- 2,2-dimethyl propane