Which ion reduces at the cathode during electrolysis of fresh brine solution?

Correct option is B

Correct option (b), H+

During the electrolysis of fresh brine solution (which is an aqueous solution of sodium chloride, NaCl), the ion that reduces at the cathode is the hydrogen ion (H⁺).

Information Booster:

• ​Brine Solution is made up of water (H₂O) and sodium chloride (NaCl). When electricity is passed through the brine.
  
• At the cathode (negative electrode)
• At the anode (positive electrode): Chloride ions (Cl⁻) are oxidized to form chlorine gas (Cl₂).
• Hydrogen ions (H⁺)
• hydrogen gas (H₂)
• 
  
• Reduction of hydrogen ions (H⁺):
  

​$$2H^+ + 2e^- \rightarrow H_2(g)$$ 

• ​Reduction of sodium ions (Na⁺)
  

$$Na^++e^- \rightarrow Na(s)$$​

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