A) \[HCO_{3}^{-}\]
B) \[{{H}_{2}}PO_{4}^{-}\]
C) Both (a) and (b)
D) None of these
Correct Answer: C
Solution :
: \[\underset{Acid}{\mathop{HCO_{3}^{1}}}\,\rightleftharpoons {{H}^{+}}+CO_{3}^{2-}\] \[\underset{Base}{\mathop{HCO_{3}^{-}}}\,+{{H}^{+}}\rightleftharpoons {{H}_{2}}C{{O}_{3}}\] \[\underset{Acid}{\mathop{{{H}_{2}}CO_{3}^{-}}}\,\rightleftharpoons {{H}^{+}}+HPO_{4}^{2-};\]\[\underset{Base}{\mathop{{{H}_{2}}PO_{4}^{-}}}\,+{{H}^{+}}\rightleftharpoons {{H}_{3}}P{{O}_{4}}\]
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