The conjugate base of H2 PO4^– is
The conjugate base of H2 PO4– is
(a) PO43–
(b) P2O5
(c) H3PO4
(d) HPO42–.
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(d) : Conjugate base is formed by the removal of H+ from acid.
H2PO4– → HPO42– + H+
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