Question

which of these is not a strong acid? hi h₂co₃ h₂so₄ hclo₄

Explanation:

Strong acids completely dissociate in water. HI (hydroiodic acid), \( \ce{H2SO4} \) (sulfuric acid), and \( \ce{HClO4} \) (perchloric acid) are strong acids. \( \ce{H2CO3} \) (carbonic acid) is a weak acid as it only partially dissociates.

Answer:

\( \ce{H2CO3} \) (the option with \( \ce{H2CO3} \))