Metal A burns in air, on heating, to form an oxide A₂O₃ whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A₂O₃ and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A₂O₃?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.

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Solution

(a) The oxide A₂O₃ is amphoteric, which can react with both acids and bases to form salt and water.

(b) The oxide BO is amphoteric, which can react with both acids and bases to form salt and water.

(c) Aluminium is a metal like A, which forms Al₂O₃ on reacting with oxygen.

(d) Zinc is a metal like B which forms ZnO on strongly heating in air (oxygen).

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