Which statement is not true for an electrochemical cell? Electrons must flow through a separate path from the reaction solutions.

The metals that form the electrodes must be identical.

Nonparticipating ions must flow to keep the electrons electrically neutral.

An oxidation-reduction reaction must occur.

B

Explanation:

C and D is correct

To be clear that electrochemical is science that study the exchange conversion of chemical energy and electric energy through redox reaction

As c is salt bridge

And d is electrochemical define

A is correct as the electricity transfer in electric wire not in solution so its B) un correct

the answer is c.the valence of the atoms combine .