Ans. Amorphous silica, the chemical composition is SiO2. This is an inorganic material that is commonly used in semiconductor circuits to isolate and differentiate the varied conducting regions. For its unique properties, silica is quintessential for a broad range of applications, that is chips, optical fibres, and also in telescope glasses, they are the manufacture done on silica.Fumed silica is actually the amorphous form of silica. Tridymite and cristobalite form the three-dimensional silicates while asbestos being the double-chain silicate.