The product , which is not obtained during the electrolysis of brine solution is ____ .
- \(cl_2\)
- H2
- HCl
- NaOH
The Correct Option is B
Solution and Explanation
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.
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