Extraction of chlrorine from brine solution is based on

Options

A. acidification
B. reduction
C. oxidation
D. chlorination

Explanation

**Step-by-Step Solution:**

1. **Understanding Brine Solution:**
- Brine solution is a concentrated solution of sodium chloride (NaCl) in water. It can be represented as NaCl·H2O.

2. **Dissociation of Brine:**
- When brine is dissolved in water, it dissociates into its constituent ions:
\[ \text{NaCl} \rightarrow \text{Na}^+ + \text{Cl}^- \]

3. **Electrolysis Process:**
- The extraction of chlorine from brine is typically carried out through the process of electrolysis. In this process, an electric current is passed through the brine solution.

4. **Electrolysis Setup:**
- The electrolysis setup consists of two electrodes: an anode (positive electrode) and a cathode (negative electrode).

5. **Reactions at the Anode:**
- At the anode, chloride ions (Cl⁻) are oxidized to form chlorine gas (Cl₂):
\[ 2\text{Cl}^- \rightarrow \text{Cl}_2 + 2\text{e}^- \]
- This reaction is an oxidation process since the chloride ions lose electrons.

6. **Reactions at the Cathode:**
- At the cathode, sodium ions (Na⁺) gain electrons to form sodium metal:
\[ \text{Na}^+ + \text{e}^- \rightarrow \text{Na} \]
- This reaction is a reduction process since the sodium ions gain electrons.

7. **Conclusion:**
- The extraction of chlorine from brine solution is based on the oxidation of chloride ions at the anode during electrolysis.

**Final Answer:**
The extraction of chlorine from brine solution is based on the oxidation of chloride ions (Cl⁻) at the anode during the electrolysis process.

---