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Representation of Cell

The calomel e...

Question

The calomel electrode is reversible with respect to

A

Mercury

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B

H+

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C

Hg2+

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D

Cl-

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Solution

The correct option is D
Cl-

Since half cell reaction

2e + Hg2Cl2 (aq.) ⇔ 2Hg (l) + 2Cl-

As Hg is liquid, its active mass is unity

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