The students are provided knowledge about the three states of the matter and bindings that exist between those states. The different law such as Boyle's law, Charles law, Gay Lussac's law and Avogadro's law has also been described in detail. The students are also made familiar with the empirical derivation of gas equation, Avogadro's number, ideal gas equation, and about the liquefaction of gases. The concept of critical temperature, kinetic energy, viscosity and surface tension.