Question

Which of the following silicates are nonplanar ?

• A. Single chain.
• B. Double chain silicate.
• C. 2D or sheet-like silicate.
• D. Cyclic silicate.

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A Single chain.
B Double chain silicate.
C 2D or sheet-like silicate.
D Cyclic silicate.

Single chain silicates, double chain silicates, 2D or sheet-like silicates and cyclic silicates are non planar as they contain tetrahedral $Si{O}_4^{4-}$ units.