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Question: Answered & Verified by Expert
In which process, fused sodium hydroxide is electrolysed for extraction of sodium?
Chemistrys Block ElementsNEET
Options:
  • A Cyanide process
  • B Castner’s process
  • C Down’s process
  • D Both (a) and (c)
Solution:
2078 Upvotes Verified Answer
The correct answer is: Castner’s process
Electrolysis of fused NaOH is carried out at 330oC using iron as cathode and nickel as anode in Castner’s process as follows
2NaOH2 Na + +2 OH
At cathode: 2Na++2e-2Na
At anode: 4OH-2H2O+O2+4e-

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