Carnallite on electrolysis gives

Options

A. Mg and `Cl_(2)`
B. Ca and `Cl_(2)`
C. K and `Cl_(2)`
D. Al and `Cl_(2)`

Explanation

To solve the question regarding what Carnallite gives on electrolysis, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Composition of Carnallite**:
- Carnallite is a mineral that contains potassium and magnesium chlorides. Its chemical formula is KCl·MgCl2·6H2O.

2. **Understand the Electrolysis Process**:
- Electrolysis involves passing an electric current through a solution to cause a chemical change. In the case of Carnallite, when it is dissolved in water and subjected to electrolysis, it dissociates into its constituent ions.

3. **Dissociation of Carnallite**:
- Upon dissolution, Carnallite dissociates into potassium ions (K⁺), magnesium ions (Mg²⁺), and chloride ions (Cl⁻).

4. **Electrolysis at the Cathode and Anode**:
- At the cathode (negative electrode), reduction occurs. The K⁺ ions gain electrons to form potassium metal (K).
- At the anode (positive electrode), oxidation occurs. The Cl⁻ ions lose electrons to form chlorine gas (Cl₂).

5. **Products of Electrolysis**:
- Therefore, the products of the electrolysis of Carnallite are potassium (K) at the cathode and chlorine (Cl₂) at the anode.

6. **Identify the Correct Option**:
- Among the given options:
- Magnesium and Chlorine
- Calcium and Chlorine
- Potassium and Chlorine
- Aluminium and Chlorine
- The correct answer is Potassium and Chlorine.

### Final Answer:
Carnallite on electrolysis gives Potassium and Chlorine.

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