Which mixed sulphate is not an alum: | CHEMISTRY - USES OF BORON AND ALUMINIUM AND THEIR COMPOUNDS | SolveeIt | Solveeit

Today, August 18

Question

Which mixed sulphate is not an alum:

A

K2SO4.Al2(SO4)3.24H2O

B

K2SO4.Cr2(SO4)3.24H2O

C

Na2SO4.Fe2(SO4)3.24H2O

D

CuSO4.Al2(SO4)3.24H2O

Answer

CuSO4.Al2(SO4)3.24H2O

Explanation

Solution

M is divalent, it should be monovalent according to the formula of alum.