The conjugate base of mono hydrogen phosphate ion is:

Q. Conjugate base of $H_{2}P{O}_4^{-}$ is:

Q. Conjugate base of $H_{2}P{O}_4^{-}$ is

Q. For $H_{3}P{O}_4,H_{3}P{O}_4\leftrightharpoons H_{2}P{O}_4^{-}+H^{+}\left(K_1\right)$
$H_{2}P{O}_4^{-}\leftrightharpoons HP{O}_4^{2-}+H^{+}\left(K_2\right)$
$HP{O}_4^{2-}\leftrightharpoons P{O}_4^{3-}+H^{+}\left(K_3\right)$, then

Q. Consider various species generated when $H_{3}P{O}_4$ is dissolved in water. According to the Bronsted Lowry’s Concept among these, the conjugate acid of $HP{O}_4^{2-}$ is :

Q. In the reaction, $H_{2}P{O}_4^{-}+H_{2}O\left(l\right)=H_3{O}^{+}\left(l\right)+HP{O}_4^{2-}\left(l\right)$ the hydrogen phosphate ion is the: