List-I	List-II
I) ${\mathrm{Sc}}_2{\mathrm{Si}}_2{\mathrm{O}}_7$	P)  $Si-O-Si$ linkage present
II) ${\mathrm{Ca}}_2{\mathrm{Mg}}_5{\left({\mathrm{Si}}_4{\mathrm{O}}_{11}\right)}_2{\left(\mathrm{OH}\right)}_2$	Q) In all tetrahedraI two oxygen shared by other tetrahedraI
III) $3\mathrm{BeO}.{\mathrm{Al}}_2{\mathrm{O}}_3.6{\mathrm{SiO}}_2$	R) In all tetrahedral three oxygen shared by other tetrahedral
IV) ${\mathrm{Mg}}_3{\left(\mathrm{OH}\right)}_4{\mathrm{Si}}_2{\mathrm{O}}_5$	S) In half of tetrahedral 2 oxygens, in half of tetrahedral 3 oxygens shared by other tetrahedral
	T) Hybridization of Si is   $s{p}^3$

The correct match is 

I)   $S{c}_{2}S{i}_2{O}_7\equiv 2S{c}^{3+}S{i}_2{O}_7^{6-}$
   
II)  $C{a}_{2}M{g}_5{\left(S{i}_4{O}_{11}\right)}_2{\left(OH\right)}_2\equiv 2C{a}^{2+},5M{g}^{2+},2O{H}^{-},2S{i}_4{O}_{11}^{6-}$
In half of the tetrahedral units two oxygens, in the remaining tetrahedral units three oxygens involved in sharing.
III)  $3Be{O}^{-}A{l}_2{O}_3.6Si{O}_2\equiv 3B{e}^{2+},2A{l}^{3+},S{i}_6{O}_{18}^{12-}$
 $S{i}_6{O}_{18}^{12-}\equiv {\left(Si{O}_2^{2-}\right)}_6$
It is cyclic silicate, per each tetrahedral two oxygens involved in sharing.
IV) $M{g}_3{\left(OH\right)}_{4}S{i}_2{O}_5\equiv 3M{g}^{2+},4O{H}^{-},S{i}_2{O}_5^{2-}$

It is 2D-Sheet silicate, per each tetrahedral three oxygens involved in sharing.