Which of the following is Swart’s reaction?

Options

A. `C_(2)H_(5)Cl+ "AgF" overset( Delta)(rarr) C_(2) H_(5) F + ` Agcl
B. `2C_(2)H_(5)Br + 2Zn rarr (C_(2) H_(5))_(2) Zn + ZnBr_(2)`
C. `2CHCl_(3) + 6Ag rarr CH equiv CH +` 6AgCl
D. `C_(2)H_(5) Br + Nal rarr C_(2)H_(5)I + `NaBr

Answer

To determine which of the following is Swart’s reaction, we need to understand the characteristics of Swart's reaction and analyze the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Swart's Reaction**:
Swart's reaction involves the exchange of halogens, specifically the substitution of a halogen atom in an alkyl halide with a fluoride ion. This is typically done by heating an alkyl bromide or chloride in the presence of metallic fluorides such as AgF, Hg2F2, or BF3.

2. **Analyzing the Options**:
- **Option 1**: C2H5Cl + AgF → C2H5F + AgCl
- This reaction involves the substitution of chlorine (Cl) in ethyl chloride (C2H5Cl) with fluorine (F) from silver fluoride (AgF). This matches the description of Swart's reaction.

- **Option 2**: (not provided in detail but mentioned as incorrect)
- The reaction involves zinc and does not conform to the Swart's reaction criteria.

- **Option 3**: (not provided in detail but mentioned as incorrect)
- This option produces ethyne and does not yield a fluoride, which is not characteristic of Swart's reaction.

- **Option 4**: C2H5Br + NaI → C2H5I + NaBr
- This is an example of the Finkelstein reaction, where bromine is replaced by iodine, which does not align with Swart's reaction.

3. **Conclusion**:
Based on the analysis, **Option 1** is the correct representation of Swart's reaction, as it involves the substitution of Cl with F in the presence of AgF.

### Final Answer:
**Option 1: C2H5Cl + AgF → C2H5F + AgCl is Swart's reaction.**

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