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For more info visit http://jeemains2018.in Classification of solids: Crystalline and Amorphous solids: S.No. 1 Crystalline Solids Regular internal arrangement of particles Amorphous solids irregular internal arrangement of particles 2 Sharp melting point Melt over a rage of temperature 3 Regarded as true solids Regarded as super cooled liquids or pseudo solids 4 Undergo regular cut Undergo irregular cut. 5 Anisotropic in nature Isotropic in nature Based on binding forces: Crystal Classification Atomic Unit Particles