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Types of Glass and Its Uses

Glass can be ...

Question

Glass can be classified as:

A

anisotropic solid

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B

a unique crystal

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C

polycrystalline solid

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D

a supercooled liquid

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Solution

The correct option is B a supercooled liquid
Pseudo solid are considered solids though they resemble liquids in many respects. They flow very slowly at room temperature as super cooled liquids. Amorphous solids are pseudo solids e.g. glass flows down as liquid.

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Q. Assertion :Glass belongs to the category of ionic solid. Reason: Glass is supercooled liquid.

Statement-I: Initially the term pseudo solid was given for solids which were easily distorted by bending and compressing forces. They even tend to flow slowly under its own weight and lose shape.

Statement-II: These characteristics are shown by pseudo solids as in pitch, glass and thus, the name pseudo solid was replaced by supercooled liquids.

Q. Assertion :Glass panes fixed to windows or doors of old buildings are slightly thicker at the bottom that at the top. Reason: Glass is pseudo solid or supercooled liquid.

Q. Crystalline solids may be anisotropic due to the arrangement of their constituent particles but how are amorphous solids isotropic in nature?

State True or False.

A liquid which is permanently supercooled is frequently called a glass.

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Types of Glass and Its Uses

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