Question

The correct statement regarding defects in crystalline solids is

• A. Frenkel defects decrease the density of crystalline solids
• B. Frenkel defect is a dislocation defect
• C. Frenkel defect is found in halides of alkaline metals
• D. Schottky defects have no effect on the density of crystalline solids

Answer 1

The correct option is B Frenkel defect is a dislocation defect

Frenkel defect is a dislocation defect as smaller ions (usually cations) are dislocated from normal sites to interstitial sites. Frenkel defect is shown by compounds having significant differences in the size of cations and anions. Hence, alkali metal halides do not show Frenkel defect. Due to Schottky defect the density of crystal decreases while Frenkel defect has no such effect on the density of crystal.