Question

Schottky defect is NOT observed in ______.

पर्याय

• NaCl

• KCl

• AgBr

• NiO

Answer 1

Schottky defect is NOT observed in NiO.

Explanation:

Schottky defect occurs in ionic compounds with high coordination numbers and equivalent cation-anion size ratios. Equal numbers of cations and anions are missing to preserve electrical neutrality. NaCl, KCl, and AgBr show Schottky defects because they have high coordination numbers and relatively similar cation-anion sizes. Since transition metal oxides often have non-stoichiometric defects like metal excess or deficiency, NiO does not have a Schottky defect.