Question

Give reason why metal oxide which show basic as well as acidic behaviour

Answer 1

Heya friend!!
Rajdeep here...

There are only three metals whose oxides are amphoteric in nature, i.e., they show acidic as well as basic behaviour. The three metals are Aluminium, Zinc and lead.

They show both acidic and basic behaviour because they react with both acids (in dilute condition) and alkalis (concentrated) to form salt and water.

Eg-
Al2O3 + 6HCl ----> 2AlCl3 + 3H2O
Al2O3 + 2NaOH + 2H2O ----> 2NaAlO2 + 3H2O

Thanks!