Q.

What is anode and cathode used in the commonly used mercury cell ?

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Anode - Zn(Hg)Cathode - HgO

Anode - ZnCathode - HgO

Anode - ZnCathode - HgO and carbon

Anode - Zn(Hg) amalgamCathode - HgO and carbon

answer is D.

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Detailed Solution

Zinc-mercury amalgam acts as anode and a paste of HgO and carbon as cathode in the mercury cell. The electrolyte is the paste of KOH and ZnO.

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