Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

Question

Professor PC Thomas Classes · Answer

Reduction potential values of $E_{\mathrm{Zn}^{2+}/\mathrm{Zn}}^{0}=-0.76 \mathrm{~V}$ and $E_{\mathrm{Fe}^{2+}/\mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V}$
Thus, due to higher negative electrode potential value of zinc than iron, iron cannot be coated on zinc.