Answer:
The chemical equations for the reactions you mentioned are:
a) Aluminium oxide reacting with sodium hydroxide

In this reaction, aluminium oxide
reacts with sodium hydroxide (NaOH) to form sodium aluminate
and water

b) Action of
on


In this reaction, iron (III) sulfate
reacts with ammonium hydroxide
to form iron (III) hydroxide
and ammonium sulfate
.
c) Zinc oxide is treated with sodium hydroxide solution

In this reaction, zinc oxide (ZnO) reacts with sodium hydroxide (NaOH) to form sodium zincate (Na_2ZnO_2) and water
