Statement -1 `HCO_(3)^(-)` ion can act as a strong base.
Statement -2 `CO_(3)^(2-)` ion can act as a weak base.

H_(2)O can act as acid as well as base.

The OH^- ion concentration of a weak base is :

Statement-1: NO_(2)^(-) ion can be detected by brown ring test in presence of NO_(3)^(-) ion. Statement-2: Both NO_(2)^(-) and NO_(3)^(-) ions are confirmed by brown ring test

HCO_(3)^(-) is conjugate base of H_(2)CO_(3) .

Statement-1: [V(CO)_(6)] cannot act as oxidising agent. Statement-2: It can be reduced by reducing agent.