Which of following is known as pyrene ?

Options

A. `CS_2`
B. `Al_4C_3`
C. `C Cl_4`
D. `Solid CO_2`

Answer

To solve the question "Which of the following is known as pyrene?", we can follow these steps:

### Step 1: Identify the term "pyrene"
- The term "pyrene" refers to a specific chemical compound.

### Step 2: Recall the chemical formula associated with pyrene
- Pyrene is commonly known as carbon tetrachloride, which has the chemical formula CCl4.

### Step 3: Understand the uses of carbon tetrachloride
- Carbon tetrachloride (CCl4) is used in various applications, including as a solvent and in fire extinguishers.

### Step 4: Note the decomposition of carbon tetrachloride
- When carbon tetrachloride decomposes, it can produce toxic substances such as phosgene (COCl2) and hydrochloric acid (HCl).

### Step 5: Conclude the answer
- Based on the information, we conclude that the answer to the question is CCl4, which is known as pyrene.

### Final Answer:
CCl4 (carbon tetrachloride) is known as pyrene.

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