Schottky defect occurs mainly in electrovalent compounds where

Options

A. positive and negative ions are of different size
B. positive and negative ions are of same size
C. positive ions are small and negative ions are big.
D. positive ions are big and negative ions are small.

Answer

2

Explanation

If in an ionic crystal of the type `X^(+)Y^(-)` equal number of cations and anions are missing from their lattice sites so that the electrical neutrality is maintained.it is called Schoottky defect.
this type of defect is shown by predominantly ionic compounds which have high coordination number `(6 or 8)` due to small difference in the size of cations and anions.