Glass is classified as an amorphous solid because it:
Has no definite melting point and no ordered atomic structure
Solids are classified as crystalline or amorphous based on the arrangement of their constituent particles.
Crystalline solids, such as salt or quartz, have a long-range ordered, repeating atomic arrangement and a sharp melting point.
Glass, however, has atoms arranged in a random, disordered manner similar to a liquid, and it softens gradually over a range of temperatures rather than melting sharply at one point.
Hence, glass is an amorphous solid because it has no definite melting point and no ordered atomic structure.
Important Questions from States of Matter
A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?
Which one among the following oxides has the highest melting point?
Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law?
Match List I with List II and select the correct answer using the code given below the Lists:
Code:List I (Noble gas)
List II (Use)
A. Argon
1. In lights for advertising display
B. Neon
2. Airport landing lights and in light houses
C. Krypton
3. Light in photographer’s flash gun
D. Xenon
4. In tungsten filament to last
Match List-I with List-II and select the correct answer using the code given below the Lists:
List I
(Process)
List II
(Type of change)
A. Heating of camphor
1. Chemical
B. Cooling of water vapor up to room temperature
2. Evaporation
C. Cooking an egg
3. Condensation
D. Formation of water vapor at room temperature.
4. Sublimation
