1.

Which one of the following is not an amphoteric substance?

Answer»

`HNO_(3)`
`HCO_(3)^(-)`
`H_(2)O`
`NH_(3)`

Solution : `HNO_(3)` is a very strong acid. It exhibits usual properties of acids. It REACTS with basic oxides, carbonates, bicarbonates and hydroxides forming corresponding salts.
`CaO+2HNO_(3)toCa(NO_(3))_(2)+H_(2)O`
`Na_(2)CO_(3)+2HNO_(3)to2NaNO_(3)+H_(2)O+CO_(2)`


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