MCQ
$Si_2O_7^{-6}$ anion is obtained when
- Ano oxygen of a $SiO_4$ tetrahedron is shared with another $SiO_4$ tetrahedron
- ✓one oxygen of a $SiO_4$ tetrahedron is shared with another $SiO_4$ tetrahedron
- Ctwo oxygen of a $SiO_4$ tetrahedron are shared with another $SiO_4$ tetrahedron
- Dthree or all four oxygen of a tetrahedron are shared with other $SiO_4$ tetrahedron

