Question

Match List - I with List - II

Choose the correct answer from the options given below: 
 

• A. (A)-(I), (B)-(IV), (C)-(III), (D)-(II)
• B. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
• C. (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
• D. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)

Hint:

The fuel cell generates electricity through the electrochemical reaction between hydrogen and oxygen, while mercury, Leclanché, and Ni-Cd cells all have distinct uses based on their electrochemical properties and rechargeability.

Answer 1

The Correct Option is C

Let’s match each cell with its correct property: - Fuel Cell (A): A fuel cell is a type of electrochemical cell that uses the reaction of hydrogen and oxygen to produce water and generate electrical energy. The reaction at the fuel cell is: \[ \text{Cell reaction:} \quad 2 \text{H}_2 + \text{O}_2 \rightarrow 2 \text{H}_2\text{O} \] Fuel cells are non-rechargeable and operate continuously as long as fuel is supplied.
Therefore, the correct match is (A)-(III). - Mercury Cell (B): A mercury cell is a primary cell, which provides a steady potential but is not rechargeable. The reaction at the anode in a mercury cell involves the oxidation of zinc: \[ \text{Reaction at anode:} \quad \text{Zn} \rightarrow \text{Zn}^{2+} + 2e^- \]
Thus, the correct match is (B)-(IV). - Leclanché Cell (C): The Leclanché cell is a primary electrochemical cell and gives a steady potential, typically used for powering small devices.
Thus, the correct match is (C)-(II). - Ni-Cd Cell (D): The Nickel-Cadmium (Ni-Cd) cell is a rechargeable secondary cell. This type of cell is typically used in applications requiring rechargeability.
Thus, the correct match is (D)-(I). Summary: The correct answer is Option (3):
- (A)-(III): Fuel cell produces electricity via the reaction \( 2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O} \).
- (B)-(IV): Mercury cell provides steady potential with the anode reaction \( \text{Zn} \rightarrow \text{Zn}^{2+} + 2e^- \).
- (C)-(II): Leclanché cell provides steady potential but is non-rechargeable.
- (D)-(I): Ni-Cd cell is rechargeable.