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H(3)PO(4)hArr H^(o+) +H(2)PO(4)^(Theta),...

`H_(3)PO_(4)hArr H^(o+) +H_(2)PO_(4)^(Theta), K_(a_(1))`:
`H_(2)PO_(4)^(Theta) hArr H^(o+) +HPO_(4)^(2-),' K_(a_(2))`:
`HPO_(4)^(2-) hArr H^(o+) + PO_(4)^(3-), K_(a_(3)):`
Mark out the incorrect statements:

A

`K_(a_(1)) gt K_(a_(2)) gt K_(a_(3)) `

B

`pH` of `(H_(2)PO_(4)^(T)) = (pKa_(2) + pKa_(3))/(2)`

C

Both `H_(2)PO_(4)` and `H_(2)PO_(4)^(T)` are more acidic than `HPO_(4)^(2-)`

D

Only `HPO_(4)^(2-)` and `H_(2)PO_(4)^(2-)` is amphiprotic anion in the solution

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The correct Answer is:
B, D
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