A) \[{{H}_{2}}{{P}_{4}}{{O}_{7}}\]
B) \[{{[HP{{O}_{4}}]}^{-2}}\]
C) \[H\]
D) \[P{{O}_{4}}^{-3}\]
Correct Answer: B
Solution :
The conjugated base of \[{{[{{H}_{2}}P{{O}_{4}}]}^{-}}\] is \[{{[{{H}_{2}}P{{O}_{4}}]}^{-}}\]. \[[{{H}_{2}}P{{O}_{4}}]\xrightarrow{{}}{{[{{H}_{2}}P{{O}_{4}}]}^{-2}}+{{H}^{+}}\]
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