Positional isomerism, an example of structural isomerism, occurs when functional groups are in different positions on the same carbon chain.
True
Positional isomerism occurs due to the difference in position of functional groups. For example, there are two structural isomers with the molecular formula C3H7Br. In one of them, Br atom is placed at the end whereas in the other it is placed at the middle.
CH3−CH2−CH2−Br - 1-bromopropane