The tetrahedral voids formed by ccp arrangement of `CI^(-)` ions in rock salt structure are

Options

A. occupied by `Na^(+)` only
B. occupied by `Cl^(-)`
C. occupied by either `Na^(+)` or `Cl^(-)`
D. neither occupied by `Na^(+)` nor `Cl^(-)`

Answer

D

Explanation

`Na^(+)` occpies octahedral voids formed by close packing of `Cl^(-)` in ccp in which all tetrahedral voids are vacant.