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  • Castner-kellner cell is used for manufacturing NaOH. The cathode in this cell is made up of :Option: 1 Fe<div class='qna

Castner-kellner cell is used for manufacturing NaOH. The cathode in this cell is made up of :

Option: 1

Fe


Option: 2

C


Option: 3

Hg


Option: 4

Ni


Answers (1)

best_answer

Preparation of NaOH by the Castner-Kellner cell is also known as mercury cathode process of electrolysis of brine solution 

cathode:  Na^{+}+e^{-}\overset{Hg}{\longrightarrow} Na-Hg\ amalgam

Anode: Cl^{-}\longrightarrow \frac{1}{2}Cl_{2}+e^{-}

In the castner - kellner cell , used to manufacture NaOH, graphite rods are used as anodes and Mercury acts as cathode.

Therefore, option(3) is correct.

Posted by

Gaurav

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