Energy Bands in Crystals — Prelims Questions

Which of the following statements is INCORRECT regarding energy bands in solids?

A material has a forbidden energy gap of $0.7,\text{eV}$. At absolute zero temperature, what is its electrical conductivity?

If the energy gap of a semiconductor is $1.12,\text{eV}$, what is the maximum wavelength of light that can be absorbed by it to create an electron-hole pair?

Which of the following materials would exhibit the highest electrical conductivity at room temperature based on their energy band gaps?

Which of the following is NOT a direct consequence of the formation of energy bands in crystalline solids?

In a p-type semiconductor, where is the acceptor energy level located relative to the valence band?