The chlorine replaces the bromine in a compound with . This is an example of a reaction.

The reaction you are describing, where chlorine replaces bromine in a compound, is an example of a substitution reaction. In chemistry, substitution reactions occur when an atom or group of atoms in a molecule is replaced by another atom or group of atoms.

In this specific case, the chlorine (Cl) atom substitutes the bromine (Br) atom in the compound, resulting in the formation of a new compound. This type of reaction is common in halogen compounds where one halogen can replace another due to differences in reactivity.

Understanding this concept is vital for studying organic chemistry, as substitution reactions can lead to the production of various derivatives of an original compound.