68th BPSC Prelims (2023), question 87

🔬 Science & Technology

87. Some metal oxides react with acid as well as base to produce salt and water. They are known as amphoteric oxides. The examples of amphoteric oxides are

    1. Al₂O₃ and ZnO
    2. Al₂O₃ and CuO
    3. CuO and ZnO
    4. More than one of the above
    5. None of the above
    Show answer

    Answer: A — Al₂O₃ and ZnO

    Al₂O₃ and ZnO are classic examples of amphoteric oxides, reacting with both acids and bases.

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