A) (1)\[{{H}_{3}}P{{o}_{4}}+{{H}_{2}}O\to {{H}_{3}}{{O}^{+}}\to {{H}_{3}}{{O}^{+}}{{H}_{2}}Po_{4}^{-}\] (2) \[{{H}_{2}}Po_{4}^{-}+{{H}_{2}}O\to HPO_{4}^{2-}+{{H}_{3}}{{O}^{+}}\] (3) \[{{H}_{2}}Po_{4}^{-}+O{{H}^{-}}\to {{H}_{3}}P{{O}_{4}}+{{O}^{2-}}\] In which of the above does \[{{H}_{2}}PO_{4}^{-}\]act as an acid? (i) Only
B) (ii) Only
C) (iii) and (ii)
D) (iii) only
Correct Answer: B
Solution :
(ii) only \[{{H}_{2}}PO_{4}^{-}+{{H}_{2}}O\xrightarrow{{}}HPO_{4}^{-2}+{{H}_{2}}{{O}^{+}}\]acid base
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