Question

Which of the following analogies is incorrect?
[0.77 Mark]

• A. $NaCl$ : Ionic solid : : $Si{O}_2$ : Covalent solid
• B. $NaCl$ : Schottky defect : : $ZnS$ : Frenkel defect
• C. Frenkel defect : Density increases : : Schottky defect : Density decreases
• D. FCC unitcell : $a=2\sqrt{2}r$ : : BCC unit cell : $a=\frac{4r}{\sqrt{3}}$

Answer 1

The correct option is C Frenkel defect : Density increases : : Schottky defect : Density decreases

In Frenkel defect, density of the crystal does not change and in Schottky defect, density of the crystal decreases.