Question
Question: Which of the following is pseudo alum ?...
Which of the following is pseudo alum ?
A
(NH4)2SO4.Fe(SO4)3.24H2O
B
K2SO4.Al2(SO4)3.24H2O
C
MnSO4.Al2(SO4)3.24H2O
D
None
Answer
MnSO4.Al2(SO4)3.24H2O
Explanation
Solution
Pseudo alum is MnSO4.Al2(SO4)3.24H2O. It containts Mn2+ , Al3+ and SO42– ions. It is not true compostion of alum.