Question

Glass is a __________
(A) Micro-crystalline
(B) supercooled liquid
(C) gel
(D) polymeric mixture

Answer 1

Solids are of two types. They are crystalline solids, and amorphous solids. amorphous solids do not have a rigid structure like crystalline solids. Amorphous solids can also be able to flow, as these are obtained by the cooling of liquids below its freezing point. glass is an amorphous solid.

Complete Step By Step Answer:
Glass is made from natural and abundant raw materials like sand, soda ash and limestone that are melted at very high temperature to form a new material (glass). Since, at high temperature glass is structurally similar to liquids, however at ambient temperature it behaves like solids.
Amorphous solids are non-crystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Glass, plastic, and gel are amorphous solids. All the amorphous solids have a tendency to flow (very slowly). Hence glass is considered as a super cooled liquid at high temperature.
Hence the correct option is (B) supercooled liquid.

Note:
In general, glass divides into two groups, namely natural glass and artificial glass. While artificial glass is produced by the melting of several raw materials. Whereas, natural glass is produced by processes in nature. Supercooling is the process of chilling a liquid below its freezing point, without it becoming solid.