The correct statement(s) regarding defects in solids is (are)

Options

A. Frenkel defect in usually favoured by a very small difference in the sizes of cation and anion.
B. Frenkel efect is a disocation defect.
C. Trapping of an electron in the lattice leads to the formation of F - center
D. Schottky defects have no effect on the physical properties of solids.

Answer

B, C

Explanation

When an ion is missing from its normal position and occupies and interstitial site between the lattice points, Frenkel defect arises, hence is a dislocation defect.
The electrons trapped in anion vacancies are referred to as F - centers.
Schottky defects asrise when some atoms ot ions are missing from their normal lattice points. Due to the presence of large number of vacancies in crystals, its density (i.e., physical property) is lowered.