Schottky defect is observed in crystals when .....................
(a) some cations move from their lattice site to interstitial sites
(b) equal number of cation and anions are missing from the lattice
(c) some lattice sites are occupied by electrons
(d) some impurity is present in the lattice
Schottky defect is observed in crystals when .....................
(a) some cations move from their lattice site to interstitial sites
(b) equal number of cation and anions are missing from the lattice
(c) some lattice sites are occupied by electrons
(d) some impurity is present in the lattice
Answer: (b) equal number of cation and anions are missing from the lattice
The Schottky defect is observed in the crystal when an equal number of cations and anions are missing from the lattice. thus, the density of solid decreases.
When some cations move from their lattice site to interstitial site is known as Frenkel defect. When some impurity is present on the crystal is known as impurity defect.
When lattice site is occupied by an electron, this type of defect is known as the Schottky metal excess defect, Hence, except (b) all statements are incorrect regarding Schottky defect.
Answer: (b) equal number of cation and anions are missing from the lattice
The Schottky defect is observed in the crystal when an equal number of cations and anions are missing from the lattice. thus, the density of solid decreases.
When some cations move from their lattice site to interstitial site is known as Frenkel defect. When some impurity is present on the crystal is known as impurity defect.
When lattice site is occupied by an electron, this type of defect is known as the Schottky metal excess defect, Hence, except (b) all statements are incorrect regarding Schottky defect.
