Coordinating number of `Na^(+)` in `NaCl` is

Pick up the correct statement: (a) The crystal of AgBr does not have Schottky defect (b) The crystal system having crystal parameters, a = b != c, alpha= beta= 90^(@), gamma= 120^(@) is for a hexagonal unit cell (c) Ionic compounds having Frenkel defect, generally show a low radius ratio value. (d) The coordination number of Na^(+) ion in NaCl is 4

TlCl has NaCl structure, the coordination number of Tl^(+) in TlCl is :

A : Coordination number of both Na^(+) and Cl^(-) NaCl is 6. R : Second coordination number of Cl^(-) in the NaCl unit is 12.

A : Coordination number of both Na^(+) and Cl^(-) NaCl is 6. R : Second coordination number of Cl^(-) in the NaCl unit is 12.

The coordination number of Cl^(+) ion in NaCl struture is…… whereas that in CsCl structure is ……..

What is the coordination number of each ion in NaCl ?