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Why does the solution near the cathode become basic in the chlor-alkali process?

Answer and explanation

Correct answer: Because hydroxide ions remain in the solution

The governing concept is the cathode reaction in aqueous brine. Water gains electrons at the cathode: 2H₂O + 2e⁻ → H₂ + 2OH⁻. Sodium ions remain in the solution and combine with hydroxide ions to form NaOH, so the region becomes basic. Thus option A is correct. Chlorine forms at the anode, salt does dissolve, and sodium metal is not deposited in water.

Related tags

CathodeSodium HydroxideChlor-Alkali ProcessAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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