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In Castner-Kellner cell for production of sodium hydroxide

Options

  1. Abrine is electrolysed using graphite electrodes
  2. Bmolten sodium chloride is electrolysed
  3. Csodium amalgam is formed at mercury cathode
  4. Dbrine is electrolysed with Pt electrodes

Correct answer

C. sodium amalgam is formed at mercury cathode

Step-by-step solution

In the Castner-Kellner cells, sodium amalgam is formed at the mercury cathode.

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