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 following compounds 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. The halogens include fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

Let's analyze the given options step by step:

1. **Option A: Chloroform (CHCl₃)**
- Chloroform contains one carbon atom (C) and three chlorine atoms (Cl).
- Since it has more than one halogen (specifically, three chlorine atoms), chloroform is a polyhalogen compound.

2. **Option B: Freon**
- Freon is a term used for a group of compounds that typically contain fluorine and chlorine.
- For example, one common Freon is CCl₂F₂, which contains two chlorine atoms and two fluorine atoms.
- Since it contains more than one halogen, Freon is also a polyhalogen compound.

3. **Option C: Carbon Tetrachloride (CCl₄)**
- Carbon tetrachloride contains one carbon atom and four chlorine atoms.
- As it has more than one halogen (specifically, four chlorine atoms), carbon tetrachloride is a polyhalogen compound.

4. **Option D: (Assuming a compound that is not specified)**
- If we consider a compound that has only one halogen atom or none at all, it would not qualify as a polyhalogen compound.
- For example, a compound like CH₃Cl (methyl chloride) has only one chlorine atom, making it not a polyhalogen compound.

**Conclusion:**
Based on the analysis, the compound that is not a polyhalogen compound is the one that contains only one halogen atom or none. If we had a specific option D, we would evaluate it similarly.