Question:

In which of the reactions given below does H2PO4- behave as an acid?(i) H3PO4+H2O→H3O++H2PO4−(ii) H2PO4−+H2O→H3O++HPO42−(iii) H2PO4−+OH−→H3PO4+O2−

Updated On: Jan 8, 2024
  • (A) (i) and (ii)
  • (B) Only (ii)
  • (C) Only (i)
  • (D) Only (iii)
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The Correct Option is B

Solution and Explanation

Explanation:
Only in the reaction (ii), H2PO4- behaves as a proton donor and is an acid by both Arrhenius and Bronsted concepts.
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