Statement-1:In electrochemical cell, we cannot use KCI in the salt bridge if anodic or cathodic compartment consists of Ag+of Pb2+ion.Statement-2:Salt bridge is employed to maintain the electrical neutrality and to minimize the liquid-liquid junction potential.a)Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.b)Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1.c)Statement-1 is True, Statement-2 is False.d)Statement-1 is False, Statement-2 is True.Correct answer is option 'B'. Can you explain this answer?

Question

Answer

Statement-1: In electrochemical cell, we cannot use KCI in the salt bridge if anodic or cathodic compartment consists of Ag or Pb2+ ion.

Statement-2: Salt bridge is employed to maintain the electrical neutrality and to minimize the liquid-liquid junction potential.

Explanation:
To understand the given statements, let's analyze each statement individually and then evaluate the relationship between them.

Statement-1: In electrochemical cell, we cannot use KCI in the salt bridge if anodic or cathodic compartment consists of Ag or Pb2+ ion.
- This statement implies that if the anodic or cathodic compartment of an electrochemical cell contains Ag or Pb2+ ions, we cannot use KCI (potassium chloride) in the salt bridge.
- Ag and Pb2+ ions have a tendency to form insoluble precipitates with chloride ions (Cl-) from KCI, which can clog the salt bridge and disrupt the flow of ions between the compartments.
- Therefore, KCI should not be used as the salt bridge in such cases.

Statement-2: Salt bridge is employed to maintain the electrical neutrality and to minimize the liquid-liquid junction potential.
- This statement highlights the purpose of a salt bridge in an electrochemical cell.
- The salt bridge is a U-shaped tube filled with an electrolyte solution (usually KCl or NaCl) that connects the two compartments of the cell.
- It helps to maintain electrical neutrality in the cell by allowing the flow of ions between the compartments, which balances the charges generated during the redox reactions.
- Additionally, the salt bridge minimizes the liquid-liquid junction potential, which can arise due to the differences in the electrolyte solutions used in the compartments.
- The junction potential can interfere with the accurate measurement of the cell potential, so the salt bridge helps to mitigate this effect.

Relationship between the statements:
- Statement-2 provides a general explanation of the purpose and function of a salt bridge in an electrochemical cell.
- Statement-1, on the other hand, specifies a limitation or exception to the choice of electrolyte for the salt bridge when Ag or Pb2+ ions are present in the compartments.
- While Statement-2 explains the overall importance of a salt bridge, it does not directly address the specific restriction mentioned in Statement-1.
- Therefore, Statement-2 cannot be considered as a correct explanation for Statement-1.

Conclusion:
Based on the analysis, the correct answer is option 'B' - Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1.

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