Chemistry - Solid State Question with Solution | TestHub

Solution:

A. In ZnS (zinc blende) structure, S²⁻ ions form an FCC lattice. Zn²⁺ ions occupy 50% of the tetrahedral voids. This statement is correct.

B. In CsCl structure, Cs⁺ ions are at the body center and Cl⁻ ions are at the corners (or vice versa). There are no octahedral voids in this simple cubic arrangement. This statement is incorrect.

C. In NaCl structure, Cl⁻ ions form an FCC lattice. Na⁺ ions occupy all octahedral voids. All tetrahedral voids remain unoccupied. This statement is correct.

D. In CaF₂ (fluorite) structure, Ca²⁺ ions form an FCC lattice. F⁻ ions occupy all (100%) tetrahedral voids. This statement is correct.

Therefore, options A, C, and D are correct.