Glass is a

by

Glass is a

liquid
colloid
non-crystalline amorphous solid
crystalline solid
This question was previously asked in
UPSC NDA-1 – 2017
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Glass is a non-crystalline amorphous solid. Unlike crystalline solids which have a highly ordered, repeating atomic structure, glass has a disordered atomic structure similar to a liquid, but it is rigid and retains its shape like a solid over geological timescales. It is sometimes described as a supercooled liquid because it flows extremely slowly, although this is a simplified view; a more accurate description is that it exists in a glass state, which is a rigid, disordered state.
Glass lacks the long-range crystalline order found in crystalline solids and is considered an amorphous solid.
Common glass (soda-lime glass) is primarily composed of silicon dioxide (silica, SiO2), with additives like sodium carbonate (soda ash) and calcium carbonate (lime) to lower its melting point and improve workability.

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