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(A) Chlorine $(Cl_2)$ is produced industrially by the electrolysis of brine,which is an aqueous solution of sodium chloride $(NaCl)$.In this process,$

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$Cl_2$

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(A) Chlorine $(Cl_2)$ is produced industrially by the electrolysis of brine,which is an aqueous solution of sodium chloride $(NaCl)$.In this process,$2NaCl(aq) + 2H_2O(l) \rightarrow 2NaOH(aq) + H_2(g) + Cl_2(g)$.Bromine is obtained from sea water by oxidation of bromide ions.Aluminum is obtained by the electrolytic reduction of molten alumina $(Al_2O_3)$ in cryolite.Sodium is obtained by the electrolysis of fused $NaCl$ (Downs process),not aqueous solution,because $H_2$ would be produced instead of $Na$ in aqueous solution.

Which of the following elements is obtained industrially by the electrolysis of an aqueous solution of its compound?

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