Question

Which of the following can show Frenkel as well as Schottky defect?

• A. $AgCl$
• B. $AgBr$
• C. $NaCl$
• D. $NaBr$

Answer 1

The correct option is B $AgBr$

Frenkel Defect is generally seen in those ionic solids in which there is a large difference in the size of cations and anions.

A Schottky defect is seen in the crystals (ionic solids) in which there is a small difference in the size of cations and anions.

Since, in $AgBr$, the size of cations and anions are such that it lies intermediate to value that is sufficient to show Frenkel Defect or Schottky Defect. So, it shows both defects.