Q. 273.7( 6 Votes )
In the process of electrolytic decomposition of aqueous solution of sodium chloride, it decomposes to form sodium hydroxide(near cathode), chlorine(at anode)and hydrogen gas(at cathode). This whole process is known as Chlor-Alkali process.
2NaCl + 2H2O ⇨ 2NaOH + Cl2 + H2
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