Question

define lsomers. draw the structure of possible isomers of butane

Answer 1

I. isobutane
compounds having same molecular formula but different structural formula
ii butane
CH3- CH2- CH2- CH3

because of following laws of isomers
I. parent chain should have most no. of carbon atoms
ii. branching cannot be done from first or last carbon atom
(parent chain is the basic chain from which branching is to be done)

Answer 2

Isomers are each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties