Question

Schottky defect in crystals is observed when

[CBSE PMT 1998; KCET 2002]

• A. Density of crystal is increased
• B. Unequal number of cations and anions are missing from the lattice
• C. An ion leaves its normal site and occupies an interstitial site
• D. Equal number of cations and anions are missing from the lattice

Answer 1

The correct option is D Equal number of cations and anions are missing from the lattice

Schottky defect is due to missing of equal number of cations and anions.