The name 'silica' covers an entire froup of minerals which have the general formula `SiO_2` the most
Channel: Doubtnut
Date: 2020-07-26

The name 'silica' covers an entire froup of minerals which have the general formula `SiO_2` the most tetrahedra arratnged in spirals . The spirals can turn in a clockwise or anti-clockwise direction - a feature that results in these being two mirror images opticallyy active, varieties of quartz.  The following pictures represent various silicate anions.  Their formulae are respectively : ` The name 'silica' covers an entire froup of minerals which have the general formula `SiO_2` the most tetrahedra arratnged in spirals . The spirals can turn in a clockwise or anti-clockwise direction - a feature that results in these being two mirror images opticallyy active, varieties of quartz.  The following pictures represent various silicate anions.  Their formulae are respectively : `