Chemistry - Solid State Question with Solution | TestHub

As coordination number of$\mathrm{C}{\mathrm{a}}^{2+}$in$\mathrm{C}\mathrm{a}{\mathrm{F}}_2$is 8 and that of${\mathrm{F}}^{-}$is 4 so option C is incorrect.
Silicon carbide (SiC) is a covalent crystaline solid.
Molecular crystals are soft in nature.
Coordination number$\propto$radius ratio.