Which of the following is not a polyhalogen compound?

Options

A. Chloroform
B. Freon
C. Carbon tetrachloride
D. Chlorobenzene

Answer

To determine which of the given options is not a polyhalogen compound, we first need to understand what a polyhalogen compound is. A polyhalogen compound is defined as a compound that contains more than one halogen atom.

Let's analyze each option step by step:

### Step 1: Analyze Option A - Chloroform (CHCl₃)
- Chloroform has the chemical formula CHCl₃.
- It contains one carbon atom (C), one hydrogen atom (H), and three chlorine atoms (Cl).
- Since there are three chlorine atoms, this compound has more than one halogen.
- **Conclusion**: Chloroform is a polyhalogen compound.

### Step 2: Analyze Option B - Freon
- Freon is a name for a class of compounds, but let's consider a common example, such as Freon-12 (CCl₂F₂).
- Freon-12 contains two chlorine atoms (Cl) and two fluorine atoms (F).
- Since it contains more than one halogen (Cl and F), it qualifies as a polyhalogen compound.
- **Conclusion**: Freon is a polyhalogen compound.

### Step 3: Analyze Option C - Another Freon Example (CCl₃F)
- If we consider another Freon example, such as CCl₃F, it contains three chlorine atoms and one fluorine atom.
- Again, this compound has more than one halogen.
- **Conclusion**: This Freon compound is also a polyhalogen compound.

### Step 4: Analyze Option D - Chlorobenzene (C₆H₅Cl)
- Chlorobenzene has the chemical formula C₆H₅Cl.
- It contains one chlorine atom (Cl) attached to a benzene ring.
- Since there is only one halogen atom present, it does not meet the criteria for a polyhalogen compound.
- **Conclusion**: Chlorobenzene is not a polyhalogen compound.

### Final Answer
Based on the analysis, the compound that is **not** a polyhalogen compound is **Option D - Chlorobenzene (C₆H₅Cl)**.

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