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How can it be proved that ZnO ls an amph...

How can it be proved that ZnO ls an amphoteric oxide?

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ZnO can react both with acid and base separately to from salt and water which concludes its basic and acidi and nature respectively.
`ZnO(s)+ H_(2)SO_(4)(aq) to ZnSO_(4) (aq) + H_(2)O(l)`
`ZnO(s) + 2NaOH(aq) to Na_(2)ZnO_(2)(aq) + H_(2)O(l)`
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