(b)
Isomeric substances that differ only in the arrangement of carbon atoms forming the base chain are known as chain isomers
$Cl$
|
$CH_{3}CH_{2}CHCH_{2}CH_{3}$ and $CH_{3} - {CH}_{2} - C - CH_{3}$
| |
$Cl$ $CH_{3}$
If the compound with the same molecular formula differ in the position of the same functional group on the identical base chain the compounds are called position isomers