Question

Which of the following is odd one out ?

• A. potassium ferricyanide
• B. ferrous ammonium sulphate
• C. potassium ferrocyanide
• D. tetraamminecopper(II) sulphate

Answer 1

Answer: (B)

ferrous ammonium sulphate

Answer 2

Mohr salt, ferrous ammonium sulphate, $FeSO_4.(NH_4)_2SO_4.6H_2O$ is a double salt, while all others are complex compounds.