Using the concepts of electronegativity and oxidation states, select the CORRECT order(s) of acidic — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Order A is correct; as oxidation state of the central halogen increases (+1 to +7), acidic strength increases. Order B is incorrect; down a group, non-metallic character and oxide acidic strength decrease. Order C is correct; down the group, atomic size increases, bond length increases, and H-bond dissociation enthalpy decreases, releasing $H^+$ easier. Order D is correct; higher oxidation state (+5 vs +3) means higher electronegativity and thus higher acidity.