Question

The cell having identical electrodes with different concentrations of electrolytes is:

• A. Battery cell
• B. Galvanic cell
• C. Electrolytic cell
• D. Concentration cell

Hint:

Concentration cells always have same electrodes but different ion concentrations.

Answer 1

The Correct Option is D

Concept: A concentration cell is an electrochemical cell in which: \[ \text{both electrodes are identical} \] but: \[ \text{electrolyte concentrations are different} \] The EMF of the cell arises due to the difference in concentration, not due to different electrode materials.

Step 1: Identify electrode nature.
Given condition: \[ \text{Identical electrodes} \] So options like galvanic or electrolytic cell are eliminated because they require different electrode potentials or external supply.

Step 2: Check driving force.
Here driving force is: \[ \text{concentration difference} \]

Step 3: Conclude cell type.
\[ \Rightarrow \text{Concentration cell} \]