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What are amphoteric oxides? Give two exa...

What are amphoteric oxides? Give two examples of amphoteric oxides.

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These are the oxides which can act both as acids and bases. For example, aluminium oxide `(Al_(2)O_(3))` and zinc oxide (ZnO). The amphoteric character of zinc oxide is shown by the following reactions.
`underset(("Basic nature"))(ZnO_((s)))+2HCl_((aq)) to underset(("Zinc chloride"))(ZnCl_(2(aq)))+H_(2)O_((l))`
`underset(("Acidic nature"))(ZnO_((s)))+2NaOH_((aq)) to underset(("Sodium zincate"))(Na_(2)ZnO_(2(aq)))+H_(2)O_((l))`
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