NEET Physics Question - Semiconductor Physics - Properties of Semiconductors

In case of a semiconductor, which of the following statement is wrong :

Doping increases conductivity

Temperature coefficient of resistance is negative

Resisitivity is in between that of a conductor and insulator

At absolute zero temperature, it behaves like a conductor

The statement "At absolute zero temperature, it behaves like a conductor" is wrong for a semiconductor.

At absolute zero (0 K), intrinsic semiconductors (like silicon and germanium) do not have free charge carriers (electrons and holes) because all the electrons occupy the valence band, and there is no thermal energy available to promote them to the conduction band.
Therefore, intrinsic semiconductors behave like insulators at absolute zero, not conductors.

Rankers Physics