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Which statement about chemical products related to common salt is correct?

Answer and explanation

Correct answer: Useful products are obtained from common salt by the chlor-alkali process

The governing concept is electrolysis of brine in the chlor-alkali process. Common salt is sodium chloride, NaCl. When its aqueous solution is electrolysed, chlorine gas forms at the anode, hydrogen gas forms at the cathode, and sodium hydroxide remains in solution: 2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂. Hence option A is correct. The other statements confuse salt chemistry or contradict its known solubility.

Related tags

Common SaltChlor-Alkali ProcessElectrolysisAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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