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Q.

Conjugate acid of ${HPO}_{4}^{2 -}$ ion is

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a

${HPO}_{3}^{2 -}$

b

H₃PO₄

c

${PO}_{4}^{3 -}$

d

$H_{2} {PO}_{4}^{-}$

answer is B.

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Detailed Solution

$Conjugate acid = Base + H^{+} = {HPO}_{4}^{2 -} + H^{+} = H_{2} {PO}_{4}^{-}$

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