Question
Chemistry Question on Haloalkanes and Haloarenes
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−
A
(A) (i) and (ii)
B
(B) Only (ii)
C
(C) Only (i)
D
(D) Only (iii)
Answer
(B) Only (ii)
Explanation
Solution
Explanation:
Only in the reaction (ii), H2PO4- behaves as a proton donor and is an acid by both Arrhenius and Bronsted concepts.