Chemistry - Solid State Question with Solution | TestHub
The correct statement(s) regarding defects in solids is/are
Options:(select one or more)
Answer:
Solution:
(A) Schottky defect is usually favored by a very small difference in the sizes of cation and anion
Correct
Schottky defect occurs in ionic solids where cation and anion sizes are comparable, so both ions leave the lattice, maintaining neutrality.
(B) Frenkel defect increases exponentially with temperature Incorrect
Frenkel defect depends mainly on small cation size and lattice structure, not exponentially on temperature (though defects generally increase, this statement is not strictly correct).
(C) Trapping of an electron in the lattice leads to formation of F-center Correct
An F-center is formed when an electron gets trapped in an anion vacancy in the crystal lattice.
(D) Solids with F-center act as semiconductors Correct
F-centers introduce color and allow electronic conduction, giving semiconducting behavior in many ionic crystals.