1.

In which process, fused sodium hydroxide is electrolysed for extraction of sodium? (a) Castner’s process(b) cyanide process(c) Down process(d) All of these

Answer»

(a) Castners process Castner’s process

NaOH ⇌ Na+ + OH- 

Cathode : Na+ + e- → Na 

Anode : 2OH- → H2O + \(\frac{1}{2}\)O2 + 2e-



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