Phosgene is commonly known as:

Options

A. Thionyl chloride
B. Carbonyl chloride
C. Carbon dioxide and phosphine
D. Phosphoryl chloride

Explanation

To solve the question "Phosgene is commonly known as:", we will follow these steps:

### Step 1: Identify Phosgene
Phosgene is a chemical compound that we need to identify.

### Step 2: Chemical Formula
The chemical formula for phosgene is COCl₂.

### Step 3: Common Name
Phosgene is commonly known as carbonyl chloride.

### Step 4: Verify Other Options
We should also verify the other options provided to ensure that carbonyl chloride is the correct answer:
- Option 1: Thionyl chloride (SOCl₂) - not phosgene.
- Option 2: Carbonyl chloride (COCl₂) - this is phosgene.
- Option 3: Carbon dioxide (CO₂) - not phosgene.
- Option 4: Phosphoryl chloride (POCl₃) - not phosgene.

### Conclusion
The correct answer is that phosgene is commonly known as carbonyl chloride.

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