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Down's Cell is used for the electrolysis of:

Correct answer: C. Fused NaCl

  • A. Aqueous NaCl
  • B. Aqueous NaNO3
  • C. Fused NaCl
  • D. Fused NaNO3

Explanation

Option C is correct since Down's cell is used for the electrolysis of fused NaCl.Option A is incorrect since, in the Castner-Kellner process, brine (aqueous sodium chloride) is electrolyzed in a cell having two compartments. Graphite anode is in the side compartments and iron cathode in the central compartment. Option B is incorrect since Down's cell is not used for the electrolysis of aqueous NaNO3.Option D is incorrect since Down's cell is not used for the electrolysis of fused NaNO3.

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