1.

The correct statements regarding defects in solids are

Answer»

FRENKEL defect is usually favoured by a very small difference in the sizes of CATION an anion
Frenkel defect is a dislocation defect
trapping of an electron in the lattice leads to the FORMATION of F-center
Schottly DEFECTS have no effect on the physical properties of solids.

Solution :When an ion is missing from its normal position and occupies an interstitaial SITE between the lattice points, Frenkel defect arises, hence it is a dislocation defect.
The electrons trapped in anion vacancies are referred to as F-centers.
Schottky defects arise when some atoms or 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.


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