INTRODUCTION Solid state is a state of matter besides liquid and gaseous state. In case of solids the inter molecular forces are very strong and empty spaces between the atoms/ions/ molecules is very less. That is why they have a fixed shape and volume. Characteristic Properties of Solids Solids are characterised by the following properties High density Low compressibility Rigidity Definite shape and volume. CLASSIFICATION OF SOLIDS Solids are broadly classified on the basis of following parameters Based on various properties Based on bonding present in building blocks, On the basis of various properties Based on their various properties solids can be classified as Crystalline solids Amorphous solids Crystalline solids have a regular structure over the entire volume and sharp properties whereas amorphous solids have irregular structure over long distances and properties are not that sharp. Various differences are listed in table below. Based on Bonding There are various type of s...