Question
Chemistry Question on Imperfections in Solids
Schottky defect in a crystal is observed when
A
an ion leaves its normal site and occupies an interstitial site
B
unequal number of cations and anions are missing from the lattice
C
density of the crystal is increased
D
equal number of cations and anions are missing from the lattice
Answer
equal number of cations and anions are missing from the lattice
Explanation
Solution
In Schottky defect, equal number of cations and anions are missing from the lattice. Due to this defect, density of crystal decreases.