Which one of the following is an amphoteric oxide?

  1. A. MgO
  2. B. P_{4}O_{10}
  3. C. Na_{2}O
  4. D. Al_{2}O_{3}

Correct Answer: D. Al_{2}O_{3}

Explanation

Aluminum oxide (Al_{2}O_{3}) is an amphoteric oxide because it can react with both acids and bases to produce salt and water.

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