(i) H3PO4+H2→H3O++ acriugate base H2PO4− (ii) H2PO4−+H2O→ aconiugate base HPO4−2+H3O+ (iii) H2PO4−+ acid OH−→ conjugate acid H3PO4+O−2 Only in reaction (ii) H2PO4−acids as 'acid'.
JEE Main 2010 — Chemistry Inorganic Chemistry
Three reactions involving H2PO4−are given below : (i) H3PO4+H2O→H3O++H2PO4− (ii) H2PO4−+H2O→HPO42−+H3O+ (iii) H2PO4−+OH−→H3PO4+O2− In which of the above does H2PO4−act as an acid ?
Held on 30 Apr 2010 · Verified 6 Jul 2026.
(ii) only
(i) and (ii)
(iii) only
(i) only
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