Download Free NCERT Solutions Class 12th Chemistry Chapter 1 The Solid State. Classification of solids based on different binding forces: molecular, ionic, covalent and metallic solids, amorphous and crystalline solids (elementary idea). Unit cell in two dimensional and three dimensional lattices, calculation of density of unit cell, packing in solids, packing efficiency, voids, numb... https://studysmartcbse.com/products/free-ncert-solutions-class-12th-chemistry-chapter-01-the-solid-state