Question

what are amphoteric oxides ? give 2 examples​

Answer 1

those metal oxides which react with both acid as well as base to form salt and water are called amphoteric oxides.

for ex: aluminium react with both acid and base to form salt and water.

Al2O3+6HCl→2AlCl3+3H2O

Al2O3 + 2NaOH → 2NaAlO2 + H2O

Answer 2

The metal oxides that can act as an acid as well as a base are called Amphoteric Oxides.

For Ex: Al2O3 and ZnO.

For Al2O3 :

Al2O3 + HCl ---» AlCl3 + H2O

Al2O3 + NaOH ----» AlCl3 + H2O

For ZnO :

ZnO + HCl ---» ZnCl2 + H2O

ZnO + 2NaOH ---» Na2ZnO2 + H2O