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Q.

The correct statement regarding defect in solids is

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a

Frenkel defect is usually favoured by a very small difference in the sizes of cations and anions

b

Frenkel defect is a dislocation defect

c

Trapping of proton in the lattice leads to the formation of F-centers

d

Schottky defect has no effect on the physical properties of solids

answer is B.

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Detailed Solution

  • A small difference in sizes of cation and anion favour Schottky defect while Frenkel defect is favoured by large difference in sizes of cation and anion
  • Trapping of an electron in the lattice leads to the formation of F-center
  • In Schottky defect, some of the atoms or ions remaining absent from their normal lattice points without distorting the original unit cell dimension. This lowers the density of solid
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