Dissociatuion of `H_(3)PO_(4)` occurs in following stages

Options

A. 1
B. 2
C. 3
D. 4

Answer

C

Explanation

`H_(3)PO_(4) Leftrightarrow H^(+)+H_(2)PO_(4^(-))`
`H_(2)PO_(4) Leftrightarrow H^(+) HPO_(4^(2-))`
`HPO_(4^(2-)) Leftrightarrow H^(+)+PO_(4^(2-))`