Question

The product , which is not obtained during the electrolysis of brine solution is ____ .

• A. \(cl_2\)
• B. H₂
• C. HCl
• D. N_aOH

Answer 1

The Correct Option is B

To determine which product is not obtained during the electrolysis of a brine solution, we need to understand the process of electrolyzing brine (a concentrated solution of sodium chloride, \( \text{NaCl} \)). During this process, the following products are typically formed:

1. Chlorine Gas (\( \text{Cl}_2 \)): At the anode, chloride ions (\( \text{Cl}^- \)) are oxidized to form chlorine gas. The reaction is:
   2 \text{Cl}^- \rightarrow \text{Cl}_2 + 2e^-\)
2. Hydrogen Gas (\( \text{H}_2 \)): At the cathode, water is reduced, leading to the formation of hydrogen gas. The reaction is:
   2 \text{H}_2\text{O} + 2e^- \rightarrow \text{H}_2 + 2 \text{OH}^-\)
3. Sodium Hydroxide (\( \text{NaOH} \)): The hydroxide ions (\( \text{OH}^- \)) produced at the cathode remain in solution and combine with sodium ions (\( \text{Na}^+ \)) to form sodium hydroxide.

From the above reactions, the products obtained during the electrolysis of brine are chlorine gas, hydrogen gas, and sodium hydroxide. However, hydrochloric acid (\( \text{HCl} \)) is not produced in this process. Instead, hydrogen gas and sodium hydroxide are formed.

Conclusion: The product not formed during the electrolysis of brine solution is hydrochloric acid (\( \text{HCl} \)).