How many groups of halocarbons exist?

Halocarbons are a class of chemical compounds that contain carbon and halogen elements. There are three major groups of halocarbons distinguished by the number of halogen atoms attached to the carbon atoms in the molecules. These groups are defined as follows:

1. Monohalocarbons: Compounds where one hydrogen atom of an alkane is replaced by one halogen atom.

2. Dihalocarbons: In these compounds, two hydrogen atoms are replaced by two halogen atoms.

3. Polyhalocarbons: This group includes compounds with three or more halogen atoms replacing hydrogen atoms in the structure.

These classifications are based on the substitution of hydrogen atoms with halogens in aliphatic or aromatic hydrocarbons, allowing for the systematic study and application of halogenated compounds in various fields, including chemistry, environmental science, and material science. Thus, the correct answer accurately reflects the established categorization of halocarbons.