In which process,fused sodium hydroxide is eletrolysed at a 330⁰C temperature

In which process,fused sodium hydroxide is eletrolysed at a 330⁰C temperature for extraction of sodium

Options

(a) Castner’s process
(b) Cyanide process
(c) Down’s process
(d) both (b) and (c)

Correct Answer:

Castner’s process

Explanation:

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