MHT CET202619 April 2026Evening ShiftChemistrySolid StateActual
Which of the following statements is true about schottky defect ?
Options
- AThe density of a substance decreases.
- BThe electrical neutrality of the substance changes.
- CIt is found in ionic compounds with larger difference between sizes of cation and anion.
- DIt develops when smaller cations occupy interstial sites from their normal sites.
Correct answer
A. The density of a substance decreases.
Step-by-step solution
Schottky defect is a type of point defect in a crystal lattice where an equal number of cations and anions are missing from their normal lattice sites. Since ions are missing from the crystal, the overall mass decreases while the volume remains unchanged, leading to a decrease in the density of the substance. Electrical neutrality is maintained because the number of missing positive and negative charges is equal. This defect is typically found in ionic compounds where the sizes of the cation and anion are almost si