$\mathrm{MnO}_{2}+4 \mathrm{HCl} \rightarrow \mathrm{MnCl}_{2}+2 \mathrm{H}_{2} \mathrm{O}+\mathrm{Cl}_{2}$ The reaction given above is a redox reaction because in this case: 1

Explanation

In the given reaction, MnO2 is reduced to MnCl2 and HCl is oxidised to Cl2, making it a redox reaction.