Match the column
`{:(A."Willionsan synthesis", P. "Conversion of phenol to salicylic acid"),(B. "Conversion of 2° alcohol to ketone", Q. "Conversion of phenol to salicaldehyde"),(C. "Reimer Tiemann reaction", R. "Heated with Cu-573k"),(D. "Kolbc's reaction", S. "reaction of alkyl halide with sodium alkoxide"):}`

Options

A. A–S, B–R, C–Q, D–P
B. A–R, B–S, C–Q, D–P
C. A–R, B–Q, C–P, D–S
D. A–Q, B–P, C–R, D–S

Answer

To solve the matching question, we need to analyze each item in column A and match it with the corresponding item in column B. Let's break it down step by step.

### Step 1: Analyze Column A
1. **Willemson synthesis**: This is a reaction used to form ethers from alcohols. It typically involves the reaction of an alkyl halide with a sodium alkoxide.
2. **Conversion of 2° alcohol to ketone**: This can be achieved through oxidation reactions, often using copper (Cu) as a catalyst.
3. **Reimer-Tiemann reaction**: This reaction involves the ortho-formylation of phenols using chloroform and a base, leading to the formation of salicylaldehyde.
4. **Kolbe's reaction**: This reaction involves the electrolysis of sodium or potassium salts of carboxylic acids, but in this context, it refers to the formation of salicylic acid from phenol and carbon dioxide.

### Step 2: Analyze Column B
1. **Conversion of phenol to salicylic acid**: This is achieved through Kolbe's reaction.
2. **Conversion of phenol to salicylaldehyde**: This is achieved through the Reimer-Tiemann reaction.
3. **Heated with Cu-573K**: This refers to the conversion of 2° alcohol to ketone.
4. **Reaction of alkyl halide with sodium alkoxide**: This describes the Williamson synthesis.

### Step 3: Matching
Now we can match the items from column A to column B:

- **A (Willemson synthesis)** matches with **S (reaction of alkyl halide with sodium alkoxide)**.
- **B (Conversion of 2° alcohol to ketone)** matches with **R (Heated with Cu-573K)**.
- **C (Reimer-Tiemann reaction)** matches with **Q (Conversion of phenol to salicylaldehyde)**.
- **D (Kolbe's reaction)** matches with **P (Conversion of phenol to salicylic acid)**.

### Final Matches
- A → S
- B → R
- C → Q
- D → P

### Conclusion
The correct matching is:
- A (Willemson synthesis) → S (reaction of alkyl halide with sodium alkoxide)
- B (Conversion of 2° alcohol to ketone) → R (Heated with Cu-573K)
- C (Reimer-Tiemann reaction) → Q (Conversion of phenol to salicylaldehyde)
- D (Kolbe's reaction) → P (Conversion of phenol to salicylic acid)