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Yes, it is amphoteric, at the same time it behaves like acid AND like base:

  1. it acts as an acid when in a base:

    ZnO(s) + 2OH-(aq) +H20(l) -> [Zn(OH)4]2-(aq)

  2. it reacts as a base when in acid:

    ZnO(s) + 2H+(aq) -> Zn2+(aq) + H2O(l)

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