Statement: An ionic solid has some point defect but its experiment density is equal to its theoretical density.
An ionic solid has some point defect but its experimental density is equal to its theoretical density. The type of defect is Frenkel effect.
When an ion leaves its correct lattice site and occupies an interstitial site, Frenkel defect is observed. Hence, the density of the crystal is not affected.
In a Schottky defect, the density of the crystal decreases.
Hence, the given statement is true