Chemistry - CHEMICAL BONDING Question with Solution | TestHub

A per-acid is characterized by the presence of a peroxy ($-O-O-$) linkage, where oxygen atoms have an oxidation state of $-1$. In HClO₄, chlorine is at its maximum oxidation state ($+7$) using only Cl-O bonds, so it lacks this linkage. Conversely, in H₃PO₅, HNO₄, and H₂SO₅, the central atoms (P, N, and S) achieve their maximum oxidation states by incorporating a peroxy bond into their structures. Thus, options (B), (C), and (D) are the correct per-acids.