No reaction occurs in which of the following equations

Options

A. `I^(ɵ)+Fe^(2+) rarr`
B. `F_(2)+2NaCl rarr`
C. `Cl_(2) +2NaF rarr`
D. `I_(2)+2NaBr rarr`

Explanation

To determine which of the given reactions does not occur, we need to analyze the reducing and oxidizing properties of the halogens and halides involved in each reaction. Here’s a step-by-step breakdown:

### Step 1: Identify the Reactants and Products
We have four reactions to analyze:
1. \( \text{I}^- + \text{Fe}^{2+} \rightarrow \text{Fe}^{3+} + \text{I}_2 \)
2. \( \text{F}_2 + \text{NaCl} \rightarrow \text{Cl}_2 + 2 \text{NaF} \)
3. \( \text{Cl}_2 + 2 \text{NaF} \rightarrow \text{F}_2 + 2 \text{NaCl} \)
4. \( \text{I}_2 + 2 \text{NaBr} \rightarrow 2 \text{NaI} + \text{Br}_2 \)

### Step 2: Analyze Each Reaction
1. **Reaction 1: \( \text{I}^- + \text{Fe}^{2+} \)**
- Iodide (\( \text{I}^- \)) cannot oxidize \( \text{Fe}^{2+} \) to \( \text{Fe}^{3+} \) since it is a weak reducing agent compared to \( \text{Fe}^{2+} \). Therefore, **no reaction occurs**.

2. **Reaction 2: \( \text{F}_2 + \text{NaCl} \)**
- \( \text{F}_2 \) is a strong oxidizing agent and can oxidize \( \text{Cl}^- \) to \( \text{Cl}_2 \) while being reduced to \( \text{F}^- \). Therefore, **this reaction occurs**.

3. **Reaction 3: \( \text{Cl}_2 + 2 \text{NaF} \)**
- Chlorine (\( \text{Cl}_2 \)) cannot oxidize \( \text{F}^- \) back to \( \text{F}_2 \) because \( \text{F}_2 \) is a stronger oxidizing agent than \( \text{Cl}_2 \). Therefore, **no reaction occurs**.

4. **Reaction 4: \( \text{I}_2 + 2 \text{NaBr} \)**
- Iodine (\( \text{I}_2 \)) can be reduced by bromide (\( \text{Br}^- \)), as bromine is a stronger oxidizing agent than iodine. Therefore, **this reaction occurs**.

### Step 3: Conclusion
From the analysis:
- **Reactions that do not occur**: 1 and 3.
- **Reactions that do occur**: 2 and 4.

Thus, the reactions where no reaction occurs are:
- **1 and 3**.

### Final Answer
No reaction occurs in the following equations:
1. \( \text{I}^- + \text{Fe}^{2+} \)
3. \( \text{Cl}_2 + 2 \text{NaF} \)