Chemistry - Solid State Question with Solution | TestHub

A. Frenkel defects create vacancies and interstitials, increasing polarizability and thus the dielectric constant.

B. ReO₃ exhibits metallic conductivity due to overlapping d-orbitals, allowing electron delocalization.

C. Group-13 elements (e.g., B, Al) are trivalent, creating "holes" in Si/Ge, forming p-type semiconductors.

D. ZnO loses oxygen upon heating, forming Zn²⁺ and free electrons, leading to metal excess defect and n-type conductivity.