Assertion No compound has both Schottky and Frenkel defects. Reason Both defects change the density of the solid. [AIIMS 2008]

Schottky defect arises when an equal number of cations and anions are missing from the lattice. It is a common defect in ionic compounds of high coordination number where both cations and anions are of the same lattice because of this density of crystal decreases and electricity conduct to a smaller extent. Frenkel defect arises when some of the ions are occupied by the interstitial spaces leaving lattice empty space. This defect is observed in where the anions much larger than cation because of this density of crystal do not change. AgBr shows both Frenkel and Schottky defect. Hence the corre