Copper sulphate solution does not react with

Options

A. Zinc
B. Iron
C. Silver
D. All of these

Answer

To determine which substance copper sulfate solution does not react with, we will analyze the reduction potentials of the involved metals.

### Step-by-Step Solution:

1. **Understand the Concept of Reduction Potential:**
- Reduction potential indicates how easily a substance can be reduced (gain electrons). A higher reduction potential means a greater tendency to be reduced.

2. **Identify the Reduction Potentials:**
- For Copper (Cu):
- \( \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} \)
- Reduction potential = +0.34 V
- For Zinc (Zn):
- \( \text{Zn}^{2+} + 2e^- \rightarrow \text{Zn} \)
- Reduction potential = -0.76 V
- For Iron (Fe):
- \( \text{Fe}^{2+} + 2e^- \rightarrow \text{Fe} \)
- Reduction potential = -0.44 V
- For Silver (Ag):
- \( \text{Ag}^{+} + e^- \rightarrow \text{Ag} \)
- Reduction potential = +0.80 V

3. **Compare the Reduction Potentials:**
- In the electrochemical series, a metal can displace another metal from its compound if it has a higher reduction potential.
- Copper (Cu) can react with metals that have a lower reduction potential than itself (like Zn and Fe).
- However, it cannot react with metals that have a higher reduction potential (like Ag).

4. **Determine the Reactivity:**
- Copper sulfate (CuSO4) can react with:
- **Iron (Fe)**: \( \text{CuSO}_4 + \text{Fe} \rightarrow \text{FeSO}_4 + \text{Cu} \)
- **Zinc (Zn)**: \( \text{CuSO}_4 + \text{Zn} \rightarrow \text{ZnSO}_4 + \text{Cu} \)
- Copper sulfate (CuSO4) **cannot react with Silver (Ag)** because Ag has a higher reduction potential (+0.80 V) than Cu (+0.34 V).

5. **Conclusion:**
- Therefore, the answer is that copper sulfate solution does not react with silver.

### Final Answer:
Copper sulfate solution does not react with **Silver (Ag)**.