Chemistry - CHEMICAL BONDING Question with Solution | TestHub

In oxyacids, only O–H hydrogens are ionizable, not X–H bonds.

H₃PO₃ is dibasic because it has two O–H groups and one non-ionizable P–H bond.

H₂SO₃ is also dibasic and contains no S–H bond.

H₃AsO₃ has three O–H groups, so it is tribasic, and no As–H bond is present.