Which is not the correct statement for ionic solids in which positive and negative ions are held by strong electrostatic attractive forces ?

Which is not the correct statement for ionic solids in which positive

1.	Which is not the correct statement for ionic solids in which positive and negative ions are held by strong electrostatic attractive forces ?
Answer» The radius ratio `r_+//r_-`increases as coordination number increases As the difference in size of IONS increases, coordination number increases When coordination number is EIGHT, `(r_+)/ (r_-)`ratio LIES between 0-225 to 0.414 In ionic solid of the type AX (ZnS, Wurtzite), the coordination number of `Zn^(2+)` and `S^(2-)` respectively are 4 and 4 Solution : When coordination number is 8, `r_+ //r_-` ratio lies between 0.732-1