Chemistry - Solid State Question with Solution | TestHub

Solid AB has ZnS type structure hence its radius ratio 0.225 as coordination number is 4.
$\frac{{\mathrm{r}}_{{\mathrm{A}}^{+}}}{{\mathrm{r}}_{{\mathrm{B}}^{-}}}=0.225$
$\frac{22.5}{{\mathrm{r}}_{{\mathrm{B}}^{-}}}=0.225$
${\mathrm{r}}_{{\mathrm{B}}^{-}}=100$pm