In the preparation of chloration of chlorine by the electrolysis of brine, the reation taking place at the anode is

Options

A. `Cl^-(aq) to 1/2 Cl_2(g) +e^-`
B. `Na^+(aq) + e^- to Na (s)`
C. `O_2 (g) +4H^+ +4e^- to 4H_2O(l)`
D. `H^+ (aq) + e^- to 1/2 H_2 (g)`

Answer

A

Explanation

Chlorine can be manufactured by electrolysis of a sodium chloride sodium (brine). The production of chlorine results in the co-products of caustic sofa (sodium hydroxide, NaOH) and hydrogengas `(H_2)`.
At cathode `2H^+(aq)+2e^(-)rarrH_2(g)`
At anode `Cl^(-)(aq)rarr1/2Cl_2(aq)+e^_`
or `2Cl^(-)(aq)rarrCl_2(g)+2e^_`