Arrange the oxoacids of chlorine in the order of increasing oxidising power and explain the orders.

Explanation

Oxidising power: With increase in the oxidation number of the central Cl atom, the oxidising power of the oxoacids increases as the release of the chlorine atom as `Cl^(+)` becomes easier. With increase in number of O atoms, the Cl atoms cannot be attacked by the oxidising agents due to steric hindrance. As a result, oxidising power of the acids decreases and that of the oxoacids increases in the order:
`overset(+7)(HClO_(4))ltoverset(+5)(HClO_(3))ltoverset(+3)(HClO_(2))ltoverset(+1)(HClO)`