Although metals form basic oxides, which of the following metals form an amphoteric oxide?

(A) Na

(B) Ca

(C) Al

(D) Cu

 

Answer

Amphi means both . Therefore, amphoteric oxides are the ones which can react with both acid and base to form salt and water. 

      Reaction of Al oxide with acids and bases - Teachoo.png

                            

So, the correct answer is (c) Al

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo