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. The following picture represents various silicate anions. their formulae are respectively.

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. The following picture represents various silicate anions. their formulae are respectively.
Answer» `SiO_(3)^(2-),Si_(3)O_(7)^(2-)` `SiO_(4)^(4-),Si_(3)O_(10)^(8-)` `SiO_(4)^(2-),Si_(3)O_(9)^(2-)` `SiO_(3)^(4-),Si_(3)O_(7)^(8-)` ANSWER :A