Question

The tendencies of the electrodes made up of Cu, Zn and Ag to release electrons when dipped in their respective salt solutions decrease in the order:

• A. Zn \( \rightarrow \) Ag \( \rightarrow \) Cu
• B. Cu \( \rightarrow \) Zn \( \rightarrow \) Ag
• C. Ag \( \rightarrow \) Cu \( \rightarrow \) Zn
• D. Ag \( \rightarrow \) Cu \( \rightarrow \) Zn

Hint:

The electrode potential determines the tendency of an electrode to lose or gain electrons. A higher potential indicates a greater tendency to gain electrons.

Answer 1

The Correct Option is C

Step 1: Electrode potential. The tendency to release electrons is determined by the electrode potential. Higher electrode potential means a greater tendency to gain electrons. In decreasing order, the electrode potentials for Ag, Cu, and Zn are as follows: \[ E^\circ (\text{Ag}^+/Ag)>E^\circ (\text{Cu}^2+/Cu)>E^\circ (\text{Zn}^2+/Zn) \]
Step 2: Conclusion. Thus, the order of tendencies to release electrons is Ag \( \rightarrow \) Cu \( \rightarrow \) Zn.