Question

Starting from the rock salt structure, the crystal structure type generated by the removal of all ions of one type is:

• A. simple cubic
• B. body-centered cubic
• C. face-centered cubic
• D. end-centered cubic

Answer 1

Answer: (C)

face-centered cubic

Starting from the rock salt structure, the crystal structure type generated by the removal of all ions of one type is face-centered cubic. In the rock salt ($NaCl$) structure, chloride ions have face-centered cubic arrangement and sodium ions occupies octahedral holes. When all the sodium ions are removed, we are left with face-centered cubic arrangement of chloride ions.