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The Solid State — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe Solid State1 Mark
MCQ
Which of the following is correct regarding defect in solid?
  • A
    Schottky defect has no effect on the physical properties of solids
  • B
    Frenkel defect is usually favoured by a very small difference in the sizes of cations and anions
  • ✓
    Frenkel defect is a dislocation defect
  • D
    Trapping of protion in the lattice leads to the formation of $F-$centres
✓

Answer

Correct option: C.
Frenkel defect is a dislocation defect
The Schottky defect has some effect on the physical properties of solids such as lower density, lower lattice energy or stability etc.
Frenkel defect is usually favoured by a large difference in the sizes of cations and anions. Cations are small in size than anions.
Frenkel defect is a dislocation defect. A cation moves to another position between two layers.
Trapping of electrons in the lattice leads to the formation of $F-$centers.

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