During electrolysis of aqueous solution of NaCI in Castner Kellner cell, the gas(es) produced are

Options

A. `CI_(2)`
B. `O_(2)`
C. `H_(2)`
D. `HCI`

Explanation

To determine the gases produced during the electrolysis of an aqueous solution of NaCl in a Castner-Kellner cell, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components in the Electrolysis Setup**:
- The aqueous solution of NaCl contains sodium ions (Na⁺) and chloride ions (Cl⁻), as well as water (H₂O), which dissociates into hydrogen ions (H⁺) and hydroxide ions (OH⁻).

2. **Movement of Ions**:
- When an electric current is passed through the solution, the cations (Na⁺ and H⁺) move towards the cathode (negative electrode), while the anions (Cl⁻ and OH⁻) move towards the anode (positive electrode).

3. **Reactions at the Cathode**:
- At the cathode, reduction occurs. The discharge potential of H⁺ is lower than that of Na⁺, which means H⁺ will be reduced first.
- The reaction at the cathode is:
\[ 2H^+ + 2e^- \rightarrow H_2(g) \]
- This means hydrogen gas (H₂) is produced at the cathode.

4. **Reactions at the Anode**:
- At the anode, oxidation occurs. The discharge potential of Cl⁻ is lower than that of OH⁻, meaning Cl⁻ will be oxidized first.
- The reaction at the anode is:
\[ 2Cl^- \rightarrow Cl_2(g) + 2e^- \]
- This means chlorine gas (Cl₂) is produced at the anode.

5. **Conclusion**:
- Therefore, during the electrolysis of an aqueous solution of NaCl in a Castner-Kellner cell, the gases produced are hydrogen (H₂) at the cathode and chlorine (Cl₂) at the anode.

### Final Answer:
The gases produced are hydrogen (H₂) and chlorine (Cl₂).

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