Multiple choice Which of the following is known as Pseudo Alum? KMn(SO4)2. 12H2O KCr(SO4)2. 12H2O NH4Fe(SO4)2. 12H2O FeSO4.Al2(SO4)3. 24H2O Reveal answer Fill a bubble to check yourself D Correct answer Explanation Pseudo alum has the general formula MIISO4. M2III (SO4)3. 24H2O. So on comparing we get FeSO4.Al2(SO4)3.24H2O is pseudo alum.