Question

Indicate the type of the following reaction :

${\mathrm{Cl}}_2+2\mathrm{KBr}\to 2\mathrm{KCl}+{\mathrm{Br}}_2$

Answer 1

$\underset{\mathrm{Chlorine}}{{\mathrm{Cl}}_2}+\underset{\mathrm{Potassium}\mathrm{bromide}}{2\mathrm{KBr}}\to \underset{\mathrm{Potassium}\mathrm{chloride}}{2\mathrm{KCl}}+\underset{\mathrm{Bromine}}{{\mathrm{Br}}_2}$

In the above reaction Chlorine is displacing Bromine from Potassium bromide.

Displacement reaction- A displacement reaction is the one wherein the atom or a set of atoms is displaced by another atom in a molecule.

A + B-C → A-C + B

The above equation exists when A is more reactive than B.

A and B have to be either:

• Halogens where C indicates a cation.
• Different metals where C indicates an anion.

Hence, the answer is displacement reaction.