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(a)  For the reduction of a metal oxide, suggest a reducing agent other than carbon.

(b)  Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.

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(a) Aluminium can be used a reducing agent other than carbon.

(b) We cannot use an aqueous solution of sodium chloride to obtain sodium metal because if we electrolyse an aqueous solution of sodium chloride, then as soon as sodium metal is produced at cathode, it will react with water present in the aqueous solution to form sodium hydroxide. Hence, electrolysis of an aqueous solution of sodium chloride will produce sodium hydroxide and not sodium metal.

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