Math the following.

Options

A. `{:(Column-I,Column-II),((Reactions),"(Characteristics)"),("Finkelstein reaction",(p)"Electrophilic catalysis"):}`
B. `{:(Column-I,Column-II),((Reactions),"(Characteristics)"),("Darzens procedure",(q)"Halide exchange"):}`
C. `{:(Column-I,Column-II),((Reactions),"(Characteristics)"),("Swarts reaction",(r)"Radical decawrboxylation"):}`
D. `{:(Column-I,Column-II),((Reactions),"(Characteristics)"),("Hunsdiecker reaction",(s)"Bimolecular substitution with retention"):}`

Answer

To solve the matching question regarding the reactions and their characteristics, we will analyze each reaction one by one and match them with their corresponding descriptions.

### Step-by-Step Solution:

1. **Finkelstein Reaction:**
- **Description:** The Finkelstein reaction involves the exchange of halogens. Specifically, it is the reaction of an alkyl halide (RCH2X) with sodium iodide (NaI) to produce an iodide compound (RCH2I) and sodium halide (NaX).
- **Characteristic:** This reaction is characterized as a halogen exchange reaction.
- **Match:** Finkelstein reaction → Q

2. **Darzen's Process:**
- **Description:** Darzen's process involves the conversion of alcohol (e.g., CH3CH2OH) to an alkyl halide using thionyl chloride (SOCl2) in the presence of a base like pyridine. This process results in the formation of an alkyl halide with retention of configuration.
- **Characteristic:** This reaction is an example of bimolecular nucleophilic substitution with retention (SNI mechanism).
- **Match:** Darzen's process → S

3. **Swartz Reaction:**
- **Description:** The Swartz reaction involves the reaction of an alkyl halide (RCH2X) with silver fluoride (AgF) or antimony trifluoride (SbF3) to produce a fluoro compound (RCH2F). This reaction is not a simple halogen exchange but involves electrophilic substitution.
- **Characteristic:** This reaction is characterized as electrophilic catalysis.
- **Match:** Swartz reaction → P

4. **Hans Dekker Reaction:**
- **Description:** The Hans Dekker reaction involves the reaction of a silver salt of a carboxylic acid (R-COOAg) with bromine (Br2) in the presence of carbon tetrachloride (CCl4). This process results in the decarboxylation of the carboxylic acid, producing a product with one less carbon atom than the original substrate.
- **Characteristic:** This reaction is an example of radical decarboxylation.
- **Match:** Hans Dekker reaction → R

### Final Matches:
- Finkelstein Reaction → Q
- Darzen's Process → S
- Swartz Reaction → P
- Hans Dekker Reaction → R