A) \[[PO_{4}^{-}]\,\,[[HPO_{4}^{--}]\]
B) \[[PO_{3}^{3}]\,\,[[{{H}_{2}}PO_{4}^{-}]\]
C) \[[HPO_{4}^{-}]\,\,[[{{H}_{2}}PO_{4}^{-}]\]
D) All of these
Correct Answer: B
Solution :
[Normal salt + acidic salt] is a buffer solution.
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