Asked in PMC Practice Test 10 (2021) 2021Moderate

Caustic Soda is made by electrolysis of concentrated solution of NaCl in _.

Correct answer: D. All of these

  • A. Nelson's Cell
  • B. Hg- Cell
  • C. Castner Kellner Cell
  • D. All of these

Explanation

Option A: Nelson's Cell, also called the Mercury Cell or Castner-Kellner Cell, is one type of electrolytic cell used for the production of caustic soda. It involves the use of a mercury cathode and a diaphragm to separate the anode and cathode compartments.Option B: Hg-Cell refers specifically to the electrolytic cell where mercury is used as the cathode material.Option C: Castner-Kellner Cell is another type of electrolytic cell used for the production of caustic soda, which does not involve the use of mercury. Option D: Caustic soda, also known as sodium hydroxide (NaOH), can be produced by the electrolysis of a concentrated solution of sodium chloride (NaCl) using different types of electrolytic cells. Therefore, all of the options mentioned (A) Nelson's Cell, (B) Hg-Cell, and (C) Castner Kellner Cell, are correct methods for the electrolysis of a concentrated solution of NaCl to produce caustic soda.

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