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

Zinc Sulphate

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Sodium hydrogen sulfate

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Iron(II) ammonium sulfate

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Tetramine copper(II) sulfate

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Solution

The correct option is D Tetramine copper(II) sulfate
$Z n S O_{4}, N a H S O_{4}, (N H_{4})_{2} F e (S O_{4})_{2}$ 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⁺

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