Multiple choice

Which of the following is known as Pseudo Alum?

  1. KMn(SO4)2. 12H2O

  2. KCr(SO4)2. 12H2O

  3. NH4Fe(SO4)2. 12H2O

  4. 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.