Question:
What is the product obtained at the cathode during the electrolysis of molten NaCl?
What is the product obtained at the cathode during the electrolysis of molten NaCl?
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In molten NaCl electrolysis:
Cathode (reduction):
\[
Na^+ + e^- \rightarrow Na
\]
Anode (oxidation):
\[
2Cl^- \rightarrow Cl_2 + 2e^-
\]
Updated On: Apr 22, 2026
- Chlorine gas
- Sodium metal
- Sodium hydroxide
- Hydrogen gas
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The Correct Option is B
Solution and Explanation
Concept:
Electrolysis is the process in which electrical energy is used to drive a non-spontaneous chemical reaction.
During electrolysis:
• Reduction occurs at the cathode
• Oxidation occurs at the anode Molten sodium chloride dissociates into ions: \[ NaCl \rightarrow Na^+ + Cl^- \]
Step 1: Identify the reaction at the cathode. At the cathode, reduction takes place. Sodium ions gain electrons. \[ Na^+ + e^- \rightarrow Na \]
Step 2: Determine the product formed. The reduced species is sodium metal. \[ \boxed{\text{Product at cathode} = Na} \]
• Reduction occurs at the cathode
• Oxidation occurs at the anode Molten sodium chloride dissociates into ions: \[ NaCl \rightarrow Na^+ + Cl^- \]
Step 1: Identify the reaction at the cathode. At the cathode, reduction takes place. Sodium ions gain electrons. \[ Na^+ + e^- \rightarrow Na \]
Step 2: Determine the product formed. The reduced species is sodium metal. \[ \boxed{\text{Product at cathode} = Na} \]
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