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What main products are obtained by electrolysis of brine in the chlor-alkali process?

Answer and explanation

Correct answer: Chlorine, hydrogen and sodium hydroxide

The governing concept is electrolysis of brine, an aqueous solution of sodium chloride. At the anode, chloride ions are oxidised to chlorine gas; at the cathode, water is reduced to hydrogen gas and hydroxide ions. The remaining sodium ions combine with hydroxide ions to form sodium hydroxide. Thus the three main products are chlorine, hydrogen, and sodium hydroxide, making option A correct. The other combinations are unrelated products.

Related tags

Chlor-AlkaliBrineElectrolysisSodium HydroxideAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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