Which is the incorrect statement?
- ADensity decreases in case of crystals with Schottky's defect
- Bis insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal
- CFrenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal
- Dhas non stoichiometric metal deficiency defect
Solution & Step-by-step Explanation
Frenkel defect involves the displacement of a smaller ion (usually the cation) from its lattice site to an interstitial site. This is favoured when there is a large difference in the sizes of the cation and anion. In contrast, Schottky defect occurs when cations and anions are of similar size. Thus, statement C is incorrect.(Note: Statement D is also technically slightly off as is typically , but C is the fundamentally wrong concept).