Question

Assertion : In mercury cell, the cell potential is approximately $1.35\, V$ and remains constant during its life.
Reason : The overall reaction in mercury cell is represented as $Zn\left(Hg\right)+HgO_{\left(s\right)} \to ZnO_{\left(s\right)}+Hg_{\left(l\right)}$

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

Overall reaction does not involve any ion in solution whose concentration can change during its life time.