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NaOH is prepared by the...

NaOH is prepared by the

A

Down cell

B

Castner cell

C

Solvary process

D

Castner-Kellner cell

Text Solution

Verified by Experts

The correct Answer is:
D
The Castner-Kellner cell is used to perform electrolysis of sodium chloride solution. It is the most widely used mercury cathode type cell. The cell involves following reactions:
At anode
`2Cl^(-)-2e^(-)rarrCl_(2)(g)`
At cathode
`2Na^(+)+2e^(-)rarr2Na`
`Na+HgrarrNa(Hg)`
`2Na(Hg)+2H_(2)O(l)rarr2Na^(+)OH^(-)(aq) +H_(2)+Hg`
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