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Priyanshu kumar Best Answer
In higher oxidation states metal oxides are more covalent in nature as the polarizing power of the metal ion proportional to its oxidation states. so their oxides are acidic in nature. ... The atom in lower oxidation state therefore is not electron deficient. As a result, it can donate electrons and behave as a base.
got this shweta?
sir
sir high polarizing power means they hlcan easily donate h +
sir