`NaOH` is prepared by the method

Options

A. Down's cell
B. Castner cell
C. Solvay process
D. Castner Kellner cell

Answer

D

Explanation

The cell involves the following reaction,
`{:(,NaCl hArr Na^(+)+Cl^(-)),("At anode :",2Cl^(-) rarr 2Cl+2e rarr Cl_(2)),("At cathode :",Na^(+)+e rarr Na),(,Na+Hg rarr" amalgam"),("At anode :",Na-" amalgam "rarrNa++Hg+e),("At cathode :",2H_(2)O+2e rarr H_(2) uarr +2OH^(-)):}`