(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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Similar questions

(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.

Q. Metals like sodium, potassium, calcium and magnesium are extracted by electrolysis of their chlorides in molten state. These metals are not extracted by reduction of their oxides with carbon because:
a) Reduction with carbon is very expensive
b) Carbon readily makes alloys with these metals
c) Carbon has less affinity for oxygen than these metals
d) Carbon is a weaker reducing agent than these metals

Q. Name oxide of one metal which is reduced by (give equation).
(i) reduction with carbon.
(ii) electrolytic reduction.
(iii) reduction with heat alone.

Q. Which one of the methods given in column- I is applied for the extraction of the metal given in column II:

Column -I	Column - II
(A) Electrolytic reduction	(i) Aluminium
(B) Reduction with carbon	(ii) Zinc
(C) Reduction with aluminium	(iii) Sodium
	(iv) Iron
	(v) Manganese
	(vi) Chromium

Q. Match the entries of column- I with appropriate entries of column- II

Column-I (Metal to be extracted)	Column-II (Method used for reduction of oxide)
(A) Iron or Zinc	(i) Reduction with aluminium
(B) Manganese or Chromium	(ii) Reduction with Carbon
(C) Mercury	(iii) Electrolytic reduction
(D) Aluminium	(iv) Reduction of heating alone

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(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.

(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.