Which of the following reactions is not correct?

Options

A. `2AgNO_(3) + Cu to Cu(NO_(3))_(2) + 2Ag`
B. \(C1_{2} + 2KI \rightarrow KCl + I_{2}\)
C. `FeSO_(4) + Cu to CuSO_(4) + Fe`
D. `CuSO_(4) + Zn to ZnSO_(4) + Cu`

Answer

To determine which of the given reactions is incorrect, we will analyze each reaction based on the principles of displacement reactions and the reactivity series of metals and non-metals.

### Step-by-Step Solution:

1. **Understand Displacement Reactions**:
Displacement reactions occur when a more reactive element displaces a less reactive element from its compound.

2. **Refer to the Reactivity Series**:
The reactivity series ranks elements based on their ability to displace others. For metals, the order is typically:
- Most reactive: Potassium (K), Sodium (Na), Calcium (Ca), Magnesium (Mg), Aluminum (Al), Zinc (Zn), Iron (Fe), Lead (Pb), Copper (Cu), Silver (Ag), Gold (Au)
- For non-metals, the order is:
- Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I)

3. **Analyze the Given Reactions**:
- **Reaction 1**: AgNO3 + Cu → Cu(NO3)2 + 2Ag
- Here, copper (Cu) displaces silver (Ag). Since Cu is above Ag in the reactivity series, this reaction is correct.

- **Reaction 2**: Cl2 + 2KI → 2KCl + I2
- Chlorine (Cl2) displaces iodine (I) from potassium iodide (KI). Since Cl is above I in the reactivity series, this reaction is also correct.

4. **Identify the Incorrect Reaction**:
If there are other reactions provided in the question that have not been analyzed, we would need to check them against the reactivity series. However, based on the two reactions analyzed, both are correct.

5. **Conclusion**:
If all provided reactions are analyzed and found to be correct, then there is no incorrect reaction among them. If a third reaction is provided, it should be evaluated similarly.