Why Aluminium Oxide and Zinc Oxide is called Amphoteric Oxides?

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Solution

An amphoteric oxide is an oxide which reacts which both acids and bases. r.
Zinc and aluminium are metals but their oxides, ZnO and Al₂O₃ are amphoteric oxides as they react with both acids and bases.

Al₂O₃ + 6HCl â†’ 2AlCl₃ + 3H₂
Al₂O₃ + 6 NaOH + 3H₂O â†’ 2Na₃Al (OH)₆
ZnO + 2HCl â†’ ZnCl₂ + H₂O
ZnO + 2NaOH + H₂O â†’ Na₂ [Zn (OH)₄]

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Why is ZnO called an amphoteric oxide? Name another amphoteric oxide?

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