1) Schottky defect in crystals is observed when A) unequal number of cations and anions are missing from the lattice B) equal number of cations and anions are missing from the lattice C) an ion leaves its normal site and occupies an interstitial site D) density of the crystal is increased Answer: Option BExplanation:It is a stoichiometric defect and it is observed when an equal number of cations and anions are missing from the lattice site.
