Question

(a) What are amphoteric oxides ? Give two examples of amphoteric oxides.

(b) Choose the acidic oxides, basic oxides and neutral oxides from the following :

Na₂O, CO₂, CO, SO₂, MgO, N₂O, H₂O.

(c) Which of the following are amphoteric oxides :

MgO, ZnO, P₂O₃, Al₂O₃, NO₂

Answer 1

(a) Those metal oxides which show basic as well as acidic behavior are known as amphoteric oxides.

Example: Aluminium oxide and zinc oxide.

(b) Acidic oxide – CO₂ , CO, SO₂ and N₂O; Basic oxide – Na₂O, MgO; Neutral oxide – H₂O.

(c) ZnO, Al₂O₃ .