Chemistry - Solid State Question with Solution | TestHub

(a) Wrong

Frenkel defect is favoured when the difference in ionic radii is very large. In the given case Schottky defect is favoured. (b) Correct

Frenkel defect arises due to dislocation of smaller ion from its normal lattice point to the interstitial space. (c) Correct

When alkali metal in the gaseous state is passed over salts like $\mathrm{NaCl}$, electrons from metal are trapped in the interstitial space giving rise to F-centre defect which is a type of Frenkel defect. (d) Wrong

Schottky defect affects physical properties of solids.