Question

Zinc oxide generally considered as amphoteric oxide

Answer 1

Metal oxides are usually basic and they react with acids to form their respective salts. But amphoteric oxides react with both acids and alkalis to form salts. ZnO reacts with hydrochloric acid forming zinc chloride and water. With sodium hydroxide, it forms sodium zincate and water.

Answer 2

Amphoteric oxides are the metal oxides which behave as both, acidic as well as basic. ZnO is considered as amphoteric oxide cuz it reacts vd both acid as well as base..

ZnO + 2HCl -----> ZnCl2 + H2
2ZnO + 2NaOH ------> Na2ZnO2 + H2