Due to the Frenkel defect,the density of a solid $..........$

Use the appropriate symbols $T$ (True) or $F$ (False) for the following statements regarding defects in solids:
$(1)$ Frenkel defect arises due to the arrangement of cations and anions with a very small difference in size.
$(2)$ Frenkel defect can be called a dislocation defect.
$(3)$ $F$-centers arise due to the migration of electrons released from metal atoms into the crystal lattice.
$(4)$ Physical properties of the crystal do not change due to Schottky defect.

Explain the following term with a suitable example:
$(ii)$ Frenkel defect

What type of defect can arise when a solid is heated? Which physical property is affected by it and in what way?

Assertion : Due to Frenkel defect,there is no effect on the density of the crystalline solid.
Reason : In Frenkel defect,no cation or anion leaves the crystal.

When electrons are trapped into the crystal in anion vacancy,the defect is known as