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Question

(i) An aqueous solution of sodium chloride is not used for electrolytic reduction of sodium metal. Why?
(ii) For the reduction of a metal oxide, suggest a reducing agent other than carbon.

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Solution

(i) An aqueous solution of sodium chloride is not used for the electrolytic reduction of sodium metal because the sodium metal, which is deposited at the cathode, reacts with water to form sodium hydroxide.

(ii) Metal oxides can be reduced to metals by using reducing agents (other than carbon) such as hydrogen and carbon monoxide.

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