# Cu(NO_3)_2 + Zn(s) -> Cu(s) + Zn(NO_3)_2 is an example of which type of reaction?

$C {u}^{2 +}$ is reduced to copper metal. Zinc metal is oxidized to $Z {n}^{2 +}$. Formal electron transfer has taken place between the ion and the metal, i.e. a redox or oxidation/reduction reaction has occurred.