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

Electrolysis of Brine Products 

Brine is a concentrated aqueous solution of \( \text{NaCl} \). During electrolysis of brine, the following reactions occur:

At the cathode (reduction):

Water molecules are preferentially reduced over sodium ions because the reduction potential of water is higher than that of sodium ions.

\( 2\text{H}_2\text{O(l)} + 2e^- \rightarrow \text{H}_2\text{(g)} + 2\text{OH}^-\text{(aq)} \)

At the anode (oxidation):

Chloride ions are oxidized to chlorine gas.

\( 2\text{Cl}^-\text{(aq)} \rightarrow \text{Cl}_2\text{(g)} + 2e^- \)

Overall Reaction:

Combining the cathode and anode reactions:

\( 2\text{NaCl(aq)} + 2\text{H}_2\text{O(l)} \rightarrow \text{H}_2\text{(g)} + \text{Cl}_2\text{(g)} + 2\text{NaOH(aq)} \)

Conclusion:

The products obtained during the electrolysis of brine are hydrogen gas (\( \text{H}_2 \)), chlorine gas (\( \text{Cl}_2 \)), and sodium hydroxide (\( \text{NaOH} \)). \( \text{HCl} \) is not formed.