Read the following short write-up and answr the questions at the end of it The name 'silica' covers an entire group of minerals, which have the general formula SiO_(2), the most common of which is quartz. Quartz is a framworksilicate with SiO_(4) tetrahdera arranged in spirals. the spirals can turnin a clockwise or anticlockwise direction-a feature that results in there being two mirror images, optically active, varieties of quartz. In the given following emperical formulae of silicates shared and unshared oxygen corner are same by each tetrahedron in.

Read the following short write-up and answr the questions at the end o

1.	Read the following short write-up and answr the questions at the end of it The name 'silica' covers an entire group of minerals, which have the general formula SiO_(2), the most common of which is quartz. Quartz is a framworksilicate with SiO_(4) tetrahdera arranged in spirals. the spirals can turnin a clockwise or anticlockwise direction-a feature that results in there being two mirror images, optically active, varieties of quartz. In the given following emperical formulae of silicates shared and unshared oxygen corner are same by each tetrahedron in.
Answer» `Si_(2)O_(7)^(6 Theta)` `(Si_(2)O_(5)^(2O.))_(n)` `(SiO_(3)^(2o.))_(n)` `SiO_(4)^(4o.)` Answer :A