$2{\mathrm{NaCl}}_{\left(\mathrm{s}\right)}\to 2{\mathrm{Na}}_{\left(\mathrm{s}\right)}+{\mathrm{Cl}}_{2\left(\mathrm{g}\right)}$ This reaction is an example for

In a chemical reaction, if the reactant undergoes decomposition to get individual components that type of reaction is known as analysis.