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GK MCQs Section
Q. Which of the following substances are amphoteric in nature, i.e., can act both as an acid and as a base?
  1. Al(OH)₃
  2. ZnO
  3. H₂O
  4. NaOH
Select the correct option from the codes given below:
Answer: 1, 2 and 3 only
Notes: Al(OH)₃, ZnO, and H₂O are amphoteric substances, capable of acting both as acids and bases in different reactions. NaOH is a strong base and does not exhibit amphoteric character. Therefore, only 1, 2, and 3 are correct.
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📌 Question Number: 257 in Inorganic Chemistry in the above course in App.