`CH_(3)COOH overset(Delta)rarr CH_(3)COCl`, What is A?

Options

A. `PCl_(5)`
B. `Cl_(2)`
C. `HCl`
D. `COCl_(2)`

Explanation

To solve the question, we need to identify the reagent (A) that can convert acetic acid (CH₃COOH) into acetyl chloride (CH₃COCl).

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactant is acetic acid (CH₃COOH).
- The product is acetyl chloride (CH₃COCl).

2. **Understand the Reaction Type**:
- This reaction involves the conversion of a carboxylic acid (acetic acid) into an acyl chloride (acetyl chloride).

3. **Identify Possible Reagents**:
- Common reagents that can convert carboxylic acids to acyl chlorides include:
- Thionyl chloride (SOCl₂)
- Phosphorus pentachloride (PCl₅)

4. **Choose the Reagent**:
- The question asks for reagent A.
- Since both SOCl₂ and PCl₅ can be used, we can conclude that:
- A could be either SOCl₂ or PCl₅.

5. **Final Answer**:
- The answer to the question is that A can be either PCl₅ or SOCl₂. However, based on the context of the video, the preferred answer given is PCl₅.