Increase in temperature decreases the conductivity of metallic conductors. Give a reason.

Explanation

Being more electropositive in nature, metals have a tendency to lose their valence electrons. Due to the presence of these free electrons metals act as good conductors. But increase in temperature increases the vibrations of metal kernels in the metal lattice. Increase in the vibrations obstructs the path of the electrons that in turn increases the resistance of the metal. Therefore, the conductivity decreases.