Question

: In a galvanic cell, the electrons flow from:
(A) Anode to cathode through the solution
(B) Cathode to anode through the solution
(C) Anode to cathode through the external circuit
(D) Cathode to anode through the external circuit

Answer 1

To solve this question, we must first understand the whole concept of galvanic cell. Then we need to assess all its data regarding its functioning and then only we can make a conclusion about our correct answer.

Complete step-by-step answer: Step 1: Let’s discuss the important concepts about galvanic cell:
As we know that, the Galvanic cell acts as a device in which simultaneous oxidation and reduction reactions take place. These reactions are used to convert the chemical energy into electrical energy, which can be utilized for any commercial purposes.
Step 2: Let’s discuss its functioning:
When an electrode is exposed to the electrolyte at the electrode-electrolyte interface, the atoms of the metal electrode have a tendency to generate ions in the electrolyte solution leaving behind the electrons at the electrode. Thus, making the metal electrode negatively charged.
While at the same time metal ions in the electrolyte solution too, have a tendency to deposit on a metal electrode. Thus, making the electrode positively charged.
Out of two electrodes, the electrode at which oxidation takes place is called anode while the electrode at which reduction takes place is called cathode. The anode has a negative potential with respect to the solution while the cathode has a positive potential with respect to the solution.
Thus, a potential difference develops between two electrodes of the galvanic cell. This potential difference is known as cell potential. When the switch is set on, due to the potential difference, electrons flow from the negative electrode to the positive electrode.

So clearly from the working principle of Galvanic cell, we can conclude that the correct answer is Option (C).

Note: Sometimes known as a voltaic cell or Daniell cell is a galvanic cell. One example of a galvanic cell is the common household battery. The electrons flow from one chemical reaction to another occurs through an external circuit that results in the current.