Name the processes from which chlorine is obtained as a byproduct

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isolationofelements

#1

Name the processes from which chlorine is obtained as a byproduct. What will happen if an aqueous solution of NaCl is subjected to electrolysis?


#2

Down’s process is the process which gives chlorine as the byproduct.
Down’s process for the manufacture of Na metal When molten NaCl is subjected to electrolysis, chlorine is obtained as a byproduct at anode because in molten state, only ${{Na}^{+}}$ and ${{Cl}^{-}}$ ions are present.

(ii) When aqueous solution of NaCl is electrolysed, ${{H}^{+}}$ ions are reduced in preference to Na+at cathode and $H _{ 2 }$ gas is released. ${{Na}^{+}}$ remains in the solution and form NaOH with ${{OH}^{-}}$ ions. Chlorine gas is obtained at anode as a byproduct.

$H _{ 2 }$ gas is obtained at cathode, chlorine gas at anode (as byproduct) and NaOH is formed in the solution.