1. Tardigrade
  2. Question
  3. Chemistry
  4. Silica (SiO2) can be crystalline as well as amorphous with following properties: I. It has high and sharp melting point. II. Crystalline III. The SiO22- tetrahedral are randomly joined to give polymeric chains or three-dimensional sheets. Which of the properties is/are matched with amorphous solids?

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Q. Silica $(SiO_2)$ can be crystalline as well as amorphous with following properties:
I. It has high and sharp melting point.
II. Crystalline
III. The $SiO_2^{2-}$ tetrahedral are randomly joined to give polymeric chains or three-dimensional sheets.
Which of the properties is/are matched with amorphous solids?

The Solid State

Solution:

Amorphous solids are not crystalline and do not have\ definite melting points. $SiO_4^{2-}$ tetrahedral are randomly joined in the form of polymeric chain or three-dimensional sheets.
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