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NaOH can be prepared by :

Option: 1

Electrolysis of concentrated solution of KCl


Option: 2

Electrolysis of concentrated solution of Na2CO3


Option: 3

Electrolysis of concentrated solution of NaHCO3


Option: 4

Electrolysis of concentrated solution of NaCl


Answers (1)

best_answer

As we learnt ,

Preparation of NaOH by Electrolytic method -

By electrolysis of concentrated solution of NaCl

NaCl(aq){\rightarrow}Na^+ +Cl^-

\\ \text{At anode: }2Cl^-\rightarrow Cl_2+2e^-\\ \text{At cathode: }2H_2O+2e^-\rightleftharpoons H_2+2OH^-

Na^+ + OH^-\rightarrow NaOH

 NaOH can be prepared by electrolysis of concentrated solution of NaCl

Therefore, option (4) is correct.

Posted by

Irshad Anwar

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