What is the oxidation number of chlorine in hclo3?explain

We know that hydrogen usually shows an oxidation state of +1, while oxygen generally shows an oxidation state of -2 (expect in peroxides and superoxides). Let us suppose that the oxidation state of Cl in HClO₃ is a. Since HClO₃ is a molecule, therefore the overall charge on it would be zero. Hence

a +  (+1) + 3(-2) = 0

This gives a = 5

Hence, the oxidation state of Cl in HClO₃ is +5.