Question

which point defect in crystals of a solid does not change the density of the solid

Answer 1

Except mass and volume, if any other point defect is present, it would not affect density.
hope it helps you

Answer 2

Explanation:

Frenkel defect is the defect in which an ion occupies a vacant site by leaving its own site. Therefore, a vacancy is created.

Since the ion occupies another site within the solid and does not get removed from the solid, thus there will be no change in the density of solid.

Hence, we can conclude that Frenkel defect is the point defect in crystals of a solid does not change the density of the solid.