Question

which of the following acids is a monoprotic, strong acid?
carbonic acid
hydrobromic acid
phosphoric acid
sulfuric acid
none of the above

Explanation:

A monoprotic acid donates 1 H⁺; a strong acid fully dissociates in water. Carbonic acid (H₂CO₃) is diprotic and weak. Hydrobromic acid (HBr) is monoprotic and strong (a halogen acid, fully dissociates). Phosphoric acid (H₃PO₄) is triprotic and weak. Sulfuric acid (H₂SO₄) is diprotic (first dissociation strong, second weak).

Answer:

hydrobromic acid