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Which of the following is not a conjugate acid-base pair? A H P O 3 2 − ​ , P O 3 3 − ​ B H 2 ​ P O 4 − ​ , H ​ P O 4 2 − ​ C H 2 ​ P O 4 − ​ , H 3 ​ P O 4 ​ D H 2 ​ P O 4 − ​ , P O 3 3 − ​

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

A

HPO32,PO33

B

H2PO4,HPO42

C

H2PO4,H3PO4

D

H2PO4,PO33

Grade:12th pass

1 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
7 months ago
H2​PO4−​,(PO3)3−​is not a conjugate acid-base pair as it differs by two protons.
A conjugate acid-base pair differs by one proton only. For example,HClandCl−ion differ by one proton only. Hence, they are the conjugate acid-base pair.
Thus,(A)HPO32−​,(PO3)3−​, (B)H2​PO4−​,H​PO42−​and (C)H2​PO4−​,H3​PO4​are conjugate acid base pairs as they differ by one proton only.

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