Question

prove the amphoteric nature with an example

Answer 1

ZnO + HCl (Acid) -----> ZnCl2 + H2

ZnO + NaOH ( Base ) -------> Na2ZnO2 + H2

Answer 2

Amphoteric oxide means the oxide which have both acidic as well as basic behaviour.
e.g. Al2O3 and ZnO

When acidic
ZnO + NaOH ==> Na2ZnO2 + H2

When basic
ZnO + 2HCl ==> ZnCl2 + H2O