Question

Which one out of the given options is an example of a complex salt?

• A. Zinc Sulphate
• B. Sodium hydrogen sulfate
• C. Iron(II) ammonium sulfate
• D. Tetramine copper(II) sulfate

Answer 1

The correct option is D Tetramine copper(II) sulfate

$ZnS{O}_4,NaHS{O}_4,\left(N{H}_4{)}_{2}Fe\right(S{O}_4{)}_2$ after dissolving in water do not retain their identities. Iron (II) ammonium sulfate is a double salt with two different cations.

Double salts are different from coordination compounds whereas ferrous ammonium sulfate salt is not a coordination compound and it ionizes into ferrous, ammonium, and sulfate ions and does not retain its identity.

Tetramine copper(II)sulfate is a complex salt of formula [Cu(NH₃)₄(H₂O)]²⁺