The species which does not have a conjugate base is

1.	The species which does not have a conjugate base is
Answer» `H_3PO_4` ` H_2PO_3^(-)` ` H_2PO_2^(-)` ` HPO_4^(2-)` SOLUTION :`H_2PO_2^(-) ` can.t DONATE `H^(+) `

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