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Classifications of Solids: Crystalline & Amorphous Video Lecture | Chemistry Class 12 - NEET

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FAQs on Classifications of Solids: Crystalline & Amorphous Video Lecture - Chemistry Class 12 - NEET

1. What is the difference between crystalline and amorphous solids?
Ans. Crystalline solids have a highly ordered and repeating arrangement of atoms or molecules, while amorphous solids lack a long-range order and have a more random arrangement of particles. Crystalline solids have a distinct shape and well-defined melting points, whereas amorphous solids do not have a specific melting point and can exhibit a wide range of shapes.
2. How are crystalline solids formed?
Ans. Crystalline solids are formed through a process called crystallization, where the atoms or molecules arrange themselves in a regular and repeating pattern. This can occur through slow cooling of a liquid or through the deposition of atoms or molecules from a vapor. The formation of a crystalline solid requires a specific arrangement of particles to occur, resulting in a highly ordered structure.
3. What are some examples of crystalline solids?
Ans. Some examples of crystalline solids include salt (sodium chloride), diamond, quartz, and snowflakes. These substances have a well-defined and repeating arrangement of atoms or molecules, giving them distinct properties and shapes.
4. How do amorphous solids differ from crystalline solids in terms of properties?
Ans. Amorphous solids, unlike crystalline solids, do not have a specific melting point. They tend to soften gradually over a range of temperatures. Additionally, amorphous solids are typically isotropic, meaning their properties are the same in all directions, while crystalline solids can exhibit anisotropic properties. In terms of transparency, amorphous solids may be transparent, translucent, or opaque, depending on their composition, whereas crystalline solids often have a distinct transparency property.
5. What are some common examples of amorphous solids?
Ans. Some common examples of amorphous solids include glass, rubber, plastic, and gels. These substances do not have a well-defined and repeating arrangement of particles, resulting in their non-crystalline structure. Amorphous solids often have unique properties and can be easily molded or shaped into various forms.
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