A) Frenkel defect
B) mass defect
C) Schottky defect
D) interstitial defect
Correct Answer: C
Solution :
Key Idea Frenkel defect It arises when an ion is missing from its normal position and occupies an interstitial site between the lattice points. This defect is also known as interstitial defect. Schottky defect It arises if some of the atom or ions are missing from their normal lattice sites. The lattice sites which are unoccupied are called lattice vacancies. Mass defect The difference between the actual mass of an isotope of an element and the sum of the masses of protons, neutrons and electrons present in it, is called mass defect. Atoms or ion missing from normal lattice point creating a vacancy due to Schottky defect.
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