`H_(2)PO_(4)^(-)` का संयुग्मी क्षार (conjugate base) हैं:

The conjugate base of H_3PO_4 IS :

Select polybasic Arrhenius acids form the following :H_(3)PO_(2),H_(3)PO_(3),H_(3)BO_(3),HCOOH,(COOH)_(2) b Write conjugate acids of SO_(4)^(2-),RNH_(2),NH_(2)^(-),C_(2)H_(5)OC_(2)H_(5),F^(-) c Write conjugate base of HNO_(2),OH^(-),H_(2)CO_(3),HClO_(4) d Write conjugate acid and conjugate base of following amphoteric species: HS^(-),NH_(3).C_(2)H_(5)OH,H_(2)O e Classify the following into Lewis base : H^(+),FeCl_(3),(CH_(3))_(3)N,F-,CH_(2)-