Question

When no current is drawn through an electrochemical cell, the sum of the electrode potentials of the two electrodes is called cell emf. True or False?

(a) True

(b) False

I got this question during an interview.

I would like to ask this question from Electrochemical Cells in chapter Electrochemistry of Chemistry – Class 12

Answer 1

The correct choice is (a) True

To elaborate: Emf of a cell is equal to the maximum potential difference across its electrodes, which occurs when no current is drawn through the cell. It can also be defined as the net voltage between the oxidation and reduction half-reactions.