Question

In which of the following processes, fused sodium hydroxide is electrolysed at a 330°C temperature for extraction of sodium?

(a) Castner's process 

(b) Down's process

(c) Cyanide process 

(d) Both (b) and (c).

Answer 1

The correct option is: (a) Castner's process 

Explanation:

In Castner's process, for production of sodium metal, sodium hydroxide (NaOH) is electrolysed at temperature 330°C.