Question

Chemical formula of alum ??

Answer 1

Alum falls in the category of Chemical compounds .

Double sulphate salt is present in Alum .

It has general formula AM 2·12H 2O.
In this general formula A is a monovalent cation and M is a trivalent metal ion.
The chemical formula of alum is KAl(SO4)2·12H2O 

Answer 2

chemical formula of alum is KAl(SO4)2·12H2O