Answer
a monotropic acid: Hydrochloric acid HCl
a diprotic acid : Sulfuric acid H₂SO₄
a triprotic acid: Phosphoric acid H₃PO₄
Work Step by Step
HCl has one proton in its formula, so it is a monotropic acid; H₂SO₄
has two protons in its formula, so it is a diprotic acid; while H₃PO₄ has three protons so it is a triprotic acid.