The reaction 2 NaCl + Fâ â 2 NaF + Clâ is a single displacement reaction (also called a substitution reaction).
In this reaction:
Fluorine (Fâ), being more reactive than chlorine (Clâ), displaces chlorine from sodium chloride (NaCl), forming sodium fluoride (NaF) and chlorine gas (Clâ).
This occurs because fluorine is higher in the reactivity series of halogens than chlorine.