Answer
Diprotic acids are those acids which can donate 2 protons ( $H^+$) ions per molecule when they dissociate in an aqueous solution.
Likewise, triprotic acids are those acids which can donate 3 protons ( $H^+$) ions per molecule when they dissociate in an aqueous solution.
Work Step by Step
Examples :
Diprotic acid : $H_2SO_4$
Triprotic acid: $H_3PO_4$
