Question

Give two examples for oxidation-reduction reaction.

Answer 1

$Mg+Zn{\left({NO}_3\right)}_2⟶Zn+Mg{\left({NO}_3\right)}_2$

Here $Mg$ is oxidised from $O$ in $Mg$ to $+2$ in $Mg{\left({NO}_3\right)}_2$, but $Zn$ is reduced from $+2$ in $Zn{\left({NO}_3\right)}_2$ to $0$ in $Zn$.

$2Na+{Cl}_2⟶2NaCl$

$Na$ is oxidised from $0$ to $+1$ in $NaCl$. But $Cl$ is reduced from $0$ to $-1$ in $NaCl.$