Correct Answer: Mohr's Salt
Subject: chemistry
Explanation: • <b>Key Fact</b> Double salts are formed by the crystallization of two different salts together but dissociate completely in solution to give all simple ions. • <b>Supporting Detail</b> Mohr's salt [FeSO₄·(NH₄)₂SO₄·6H₂O] and Alum (Fitkari) are prime examples. • <b>Related Concept</b> Potassium ferrocyanide is a Complex Salt, which does not dissociate freely into simple ions in water. • <b>Why wrong options are wrong</b> NaCl is a Normal Salt; NaHCO₃ is an Acidic Salt (formed by polybasic acid). • <b>Exam Trick</b> Double salts lose their identity in water, complex salts do not. • <b>Additional Info</b> Mixed salts contain two different bases or acids, like Bleaching powder CaOCl₂.
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