Chemistry - CHEMICAL BONDING Question with Solution | TestHub

A peroxy linkage is an O–O single bond present in a compound.

H₂S₂O₈ (peroxodisulfuric acid): contains –O–O– → peroxy linkage present.

H₂S₂O₇ (pyrosulfuric acid): structure contains S–O–S, but no O–O bond → peroxy linkage absent.

H₂SO₅ (Caro’s acid): contains –O–O– → peroxy linkage present.

CrO₅: contains peroxo (O–O) linkage → peroxy linkage present.

Therefore,

H₂​S₂​O_7​​