A) \[PO_{4}^{3-},{{C}_{2}}O_{4}^{2-}\]
B) \[PO_{4}^{3-},HPO_{4}^{2-}\]
C) \[H{{C}_{2}}O_{4}^{-},HPO_{4}^{2-}\]
D) \[H{{C}_{2}}O_{4}^{-},{{C}_{2}}O_{4}^{2-}\]
Correct Answer: A
Solution :
\[\underset{acid}{\mathop{H{{C}_{2}}O_{4}^{-}}}\,+\underset{base}{\mathop{PO_{4}^{3-}}}\,\underset{\begin{smallmatrix} conjugated \\ \,\,\,\,\,\,\,acid \end{smallmatrix}}{\mathop{HPO_{4}^{2-}}}\,+\underset{\begin{smallmatrix} conjugated \\ \,\,\,\,\,\,\,\,base \end{smallmatrix}}{\mathop{{{C}_{2}}O_{4}^{2-}}}\,\] Hence,\[PO_{4}^{3-}\]and\[{{C}_{2}}O_{4}^{2-}\]are Bronsted base.
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