The `IUPAC` name of C_(6)H_(5)COCI` is:

Options

A. Benzoyl chloride
B. Benzene chloro ketone
C. Benzene carbonyl choride
D. Chloro phenyl ketone

Explanation

To find the IUPAC name of the compound C₆H₅COCl, we can follow these steps:

### Step 1: Identify the Structure
The molecular formula C₆H₅COCl indicates that we have a benzene ring (C₆H₅) attached to a carbonyl group (C=O) and a chlorine atom (Cl).

### Step 2: Draw the Structure
Drawing the structure helps visualize the compound:
- Start with a benzene ring (6 carbon atoms in a cyclic structure with alternating double bonds).
- Attach a carbonyl group (C=O) to one of the carbon atoms of the benzene ring.
- Attach a chlorine atom (Cl) to the carbon atom of the carbonyl group.

The structure can be represented as:
```
Cl
|
C6H5 - C=O
```

### Step 3: Determine the Functional Groups
In this compound, we have:
- A benzene ring (aromatic compound).
- A carbonyl group (C=O), which indicates that this is a ketone or an acyl chloride.
- A chlorine atom attached to the carbonyl carbon.

### Step 4: Naming the Compound
According to IUPAC nomenclature:
- The base name will be derived from the benzene ring.
- Since there is a carbonyl group attached to the benzene, we will use the term "carbonyl".
- The presence of the chlorine atom indicates that it is a halogen substituent.

Thus, the IUPAC name will be:
- "Benzene carbonyl chloride".

### Final Answer
The IUPAC name of C₆H₅COCl is **benzene carbonyl chloride**.

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