Name the processes from which chlorine is obtained as a by-product. What will happen if an aqueous solution of NaCl is subjected to electrolysis?
(1) In Down's process for the manufacture of sodium, the electrolysis of NaCl gives chlorine as a byproduct. NaCl(l)ElectrolysisNa+(melt)+Cl−(melt) At anode : Cl−(melt)→Cl(g)+e− Cl(g)+Cl(g)→Cl2(g) At cathode : Na+(melt)+e−→Na(s) (2) In Castner Kellner cell, electrolysis of brine solution is carried out to manufacture NaOH (caustic soda). Chlorine is obtained as a byproduct.
