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Which base remains in the solution during the chlor-alkali process?

Answer and explanation

Correct answer: Sodium hydroxide

In the chlor-alkali process, an aqueous solution of sodium chloride is electrolysed. Chlorine is released at the anode, while water is reduced at the cathode to form hydrogen and hydroxide ions. The sodium ions remaining in solution combine with hydroxide ions, producing sodium hydroxide: 2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂. Thus option A is correct. The other hydroxides are not formed from brine because calcium, magnesium, and ammonium ions are absent.

Related tags

ScienceClass 10Acids Bases SaltsChlor-AlkaliSodium HydroxideAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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