Question

Assertion : Cyclic silicates, three corners of each `SiO_(4)` tetrahedron are shared while in chain silicates only two are shared while in chain silicates only two are shared with other tetrahedron.
A. If both assertion and reason are true and the reason is the correct explanation of teh assertion.
B. If both assertion and reason are true but reason in not the correct explation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer 1

Correct Answer - C
Cyclic silicate and chain silicate both have same general formula `(SiO_(3))^(2-)`. In cyclic silicates oxygen atom is shared per tetrahedral and the basic unit is `Si_(3)O_(9)^(6-)` chain silicates involving sharing of two oxygen atoms by each tetrahadral having basic unit `(SiO_(3))_(n)^(2n-)`.