1.

Amphoteric behaviour is shown byA. `H_(2)CO_(3)` and `AI_(2)O_(3)`B. `HCO_(3)^(-)` and `H_(2)O`C. `HCO_(3)^(-)` and `H_(3)O^(+)`D. `H_(2)CO_(3)` and `H_(2)O`

Answer» Correct Answer - B
Amphoteric behaviour is that any species which acts as an acid as well as base.
`underset("Acid")(HCO_(3)^(-)) rarr CO_(3)^(2-)+H^(+)`
`underset("Base")(HCO_(3)^(-)) +H^(+) rarr H_(2)CO_(3)`
`underset("Acid")(H_(2)O) rarr OH^(-) +H^(+)`
`underset("Base")(H_(2)O)+H^(+) rarr H_(3)O^(+)`


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