Chemistry - Complete Pblock- Question with Solution | TestHub

In silicates, two oxygen atoms per ${\mathrm{SiO}}_4$ tetrahedron are shared giving polymeric anion chains. When each tetetrahedron $\left({\mathrm{SiO}}_4^{4-}\right)$ shares two O atoms, infinite chains are formed. The formula of these extended anions approximates to ${\left({\mathrm{SiO}}_3\right)}_n^{2n-}$ or ${\left({\mathrm{SiO}}_3^{2-}\right)}_n.{\mathrm{SiO}}_4^{4-}$ anion is present in orthosilicates. ${\mathrm{Si}}_2{\mathrm{O}}_7^{6-}$ anion is present in pyrosilicates, while ${\left({\mathrm{Si}}_2{\mathrm{O}}_5^{2-}\right)}_n$ anion is present in double-chain silicates as well as in sheet silicates. Structure of silicate: