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Some salts although containing two diffe...

Some salts although containing two different metallic elements give test for one of them in solution Such salts are :

A

complex salt

B

double salts

C

normal salt

D

none

Text Solution

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The correct Answer is:
To answer the question regarding salts that contain two different metallic elements but give a test for only one of them in solution, we can follow these steps: ### Step 1: Understand the Types of Salts There are different types of salts based on their composition and dissociation behavior in solution. The main types to consider are: - Complex salts - Double salts - Normal salts ### Step 2: Analyze Complex Salts Complex salts are formed when a metal ion is surrounded by a group of molecules or ions (ligands). In solution, complex salts do not fully dissociate into their constituent ions. For example, potassium ferrocyanide (K₄[Fe(CN)₆]) dissociates into potassium ions (K⁺) and the complex anion [Fe(CN)₆]⁴⁻. The complex ion remains intact and does not dissociate further, which means that only the potassium ions can be tested in solution. ### Step 3: Analyze Double Salts Double salts consist of two different salts that crystallize together. When dissolved in water, double salts dissociate completely into their individual ions. For instance, carnallite (KCl·MgCl₂·6H₂O) dissociates into K⁺, Cl⁻, Mg²⁺, and Cl⁻ ions. In this case, both metallic elements can be tested in solution. ### Step 4: Analyze Normal Salts Normal salts, like sodium chloride (NaCl), dissociate completely into their respective ions (Na⁺ and Cl⁻) when dissolved in water. Both metallic elements can be tested in this case as well. ### Step 5: Conclusion Based on the analysis, the type of salt that contains two different metallic elements but gives a test for only one of them in solution is the **complex salt**. This is because the complex ion remains intact and does not dissociate further, allowing only one metallic element to be tested. ### Final Answer: The salts that contain two different metallic elements but give a test for only one of them in solution are **complex salts**. ---
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