1. Tardigrade
  2. Question
  3. Chemistry
  4. Assertion: The cell potential of mercury cell is 1.35 V, which remains constant. Reason: In mercury cell, the electrolyte is a paste of KOH and ZnO.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Assertion : The cell potential of mercury cell is $1.35\, V$, which remains constant.
Reason : In mercury cell, the electrolyte is a paste of $KOH$ and $ZnO$.

AIIMSAIIMS 2008

Solution:

$Zn (l)+ Hg (s) \longrightarrow ZnO (s)+ Hg (l)$
The cell potential remains constant during its life as the overall reaction does not involve any ion in solution whose concentration changes during its life time.