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Question

Select incorrect statement
  1. If salt-bridge is removed, potential falls to zero
  2. Liquid-junction potential developed across the boundary of the two solutions of different concentration cells are used
  3. Calomel electrode contains calcium chloride solution in contact with Pt electrode
  4. Quinhydrone electrode is reversible to H+

A
If salt-bridge is removed, potential falls to zero
B
Quinhydrone electrode is reversible to H+
C
Liquid-junction potential developed across the boundary of the two solutions of different concentration cells are used
D
Calomel electrode contains calcium chloride solution in contact with Pt electrode
Solution
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The correct option is C Calomel electrode contains calcium chloride solution in contact with Pt electrode
Calomel eletrode contains calomel paste (Hg2Cl2) in contact with Hg(l) and (aq)KCl solution. Pt electrode is dipped to make contact.

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