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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pb162

Select the correct statement(s) about silicate structures.

AOrthosilicates contain $SiO X_{4}$ units that share two corners.
BIn pyrosilicates, $Si X_{2} O X_{7} X^{6 -}$ , two tetrahedra share one oxygen.
CSingle-chain silicates have the formula $(SiO X_{3}) X_{n} X^{2 n -}$ .
DSheet silicates have the formula $(Si X_{2} O X_{5}) X_{n} X^{2 n -}$ .

Answer: B, C, D

Orthosilicates have discrete

SiO X_{4} X^{4 -}

units with no sharing (A false). The pyrosilicate shares one oxygen (B true); chains share two (C true); sheets share three (D true).

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