- A double salt is a crystalline salt that contains two different cations or anions and crystallizes as a single structure. - When dissolved in water, a true double salt dissociates completely into simple ions. For K₂SO₄. Al₂(SO₄)₃. 24H₂O, it dissolves to give K⁺, Al³⁺, and SO₄²⁻ ions in solution. - Examples of double salts include alums (like potash alum), Mohr's salt (FeSO₄.(NH₄)₂SO₄.6H₂O), and carnallite (KCl.MgCl₂.6H₂O). - Option A (FeSO₄. 6H₂O) is a hydrated simple salt. - Option B (Pb(OH)NO₃) is a basic salt. - Option D (K₄ [Fe(CN)₆]) is a complex salt or coordination compound. In solution, it dissociates into K⁺ ions and the complex ion [Fe(CN)₆]⁴⁻, which does not break down into Fe²⁺ and CN⁻ ions, thus retaining its identity.
Which of the following is double salt?
Asked in WBCS Main Paper 4 2022 · Topic: Acid, Base and Salt (Types of Salts (Acidic, Basic, Neutral))
More Chemistry questions
- Which one of the following is an acidic salt ?
- If the solubility of CaF$_2$ in water is 's' moles per litre, its solubility product will be - (1) s$^2$ (2) 2s$^2$ (3) 105s$^5$ (4) 4s$^3$ (5) Question not attempted
- Which does not constitute a buffer solution? (1) H₂CO₃ + NaOH (2) NH₄OH + NH₄Cl (3) CH₃COOH + CH₃COONa (4) H₂CO₃ + NaH CO₃ (5) Question not attempted
- In ion exchange method, which ions are removed from hard water?
- Blue vitriol is chemically
- The number of water molecules associated with copper sulphate molecule to form crystals is
- Which one of the following is the number of water molecules that share with two formula unit CaSO₄ in plaster of Paris ?
- Number of molecules of water of crystallization in copper sulphate, sodium carbonate and Gypsum are