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Chem Chemistry

ChemistryNEB 2074 (old course) (grade increment)

Differentiate between Crystalline solid and Amorphous solid with an example of each.

2

Answer

· Based on the official syllabus and past papers
Updated 
| **Feature**               | **Crystalline Solid**                          | **Amorphous Solid**                          |
|---------------------------|-----------------------------------------------|----------------------------------------------|
| **Definition**            | Particles arranged in a regular, repeating 3D lattice. | Particles lack long-range order; random arrangement. |
| **Melting Point**         | Sharp, definite melting point.                | Softens over a range of temperatures.        |
| **Cleavage**              | Cleaves along definite planes.                | No definite cleavage planes.                  |
| **Isotropy/Anisotropy**   | Anisotropic (properties vary with direction). | Isotropic (properties same in all directions). |
| **Example**               | Sodium chloride (NaCl).                       | Glass.                                       |

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