Q.

The reference electrode is made by using

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a

ZnCl2

b

CuSO4

c

HgCl2

d

Hg2Cl2

answer is D.

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Detailed Solution

Primary reference electrode is SHESecondary reference electrode is 1) Calomel electrode 2) Quinhydrone electrode.Calomel electrode is an aq.phase in contact with Hg and Hg2Cl2 in a saturated solution of KCl in water.Cell notation Cl(1M)-/Hg2Cl2(s)/Hg(l)/Pt(s)
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