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NEET levelSingle correct optionDifficulty 1 of 3pb147

The basic structural unit of all silicates is

Athe $SiO X_{3} X^{2 -}$ planar triangle
Bthe $SiO X_{6} X^{8 -}$ octahedron
Cthe $SiO X_{4} X^{4 -}$ tetrahedron
Dthe $SiO X_{2}$ linear molecule

Answer: C

Silicon is bonded tetrahedrally to four oxygens, giving the

SiO X_{4} X^{4 -}

unit; different sharing of corner oxygens gives chains, sheets and 3D networks.

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