Pyrene is the commerical name of-

Options

A. Degreasing agent `CHCl_(3)`
B. Fire extinguisher `"CCl"_(4)`
C. Insecticide `CHI_(3)`
D. Aerosol, propellant, `C_(2)Cl_(4) F_(2)`

Answer

To solve the question "Pyrene is the commercial name of...", we can follow these steps:

### Step 1: Identify Pyrene
First, we need to understand what Pyrene refers to in the context of commercial products. Pyrene is known to be associated with certain chemicals and products.

**Hint:** Research the term "Pyrene" in the context of chemical compounds and commercial products.

### Step 2: Recognize the Options
Next, we should look at the options provided in the question. The options include various chemicals and products. We need to determine which of these is commonly known as Pyrene.

**Hint:** List out the options and consider their common uses or applications.

### Step 3: Relate Pyrene to its Commercial Name
From our knowledge, Pyrene is the commercial name for a specific fire extinguisher. It is also known as CCL-4, which is short for Carbon Tetrachloride (CCl4). This compound was widely used in fire extinguishers before being phased out due to environmental concerns.

**Hint:** Recall that CCL-4 is a chemical compound that has been used in fire extinguishers.

### Step 4: Confirm the Answer
Based on the information gathered, we can conclude that Pyrene is indeed the commercial name of CCL-4, which is a fire extinguisher.

**Hint:** Verify the relationship between Pyrene and CCL-4 to ensure accuracy.

### Final Answer
Thus, the answer to the question is:
**Pyrene is the commercial name of CCL-4 (Carbon Tetrachloride).**