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Which of the following is not a conjugat...

Which of the following is not a conjugate acid-base pair?

A

`HPO_(3)^(2-),PO_(3)^(3-)`

B

`H_(2)PO_(4)^(-),HPO_(4)^(2-)`

C

`H_(2)PO_(4)^(-),H_(3)PO_(4)`

D

`H_(2)PO_(4)^(-),PO_(3)^(3-)`

Text Solution

Verified by Experts

The correct Answer is:
D
`"Acid"_(1)+"Base"_(2)hArr"Acid"_(2)+"Base"_(1)`
`HPO_(4)^(2-)+H_(2)O hArr H_(3)O^(+)+PO_(3)^(3-)`
`H_(2)PO_(4)^(-)+H_(2)O hArrH_(3)O ^(+)+HPO_(4)^(2-)`
`H_(3)PO_(4)+H_(2)O hArr H_(3)O^(+)+H_(2)PO_(4)^(2-)`
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