UNIT- I 1. Ideal Gas 2. Real Gas UNIT- II 3. Liquefaction of Gases 4. Mean Free Path and Transport Phenomena UNIT- III 5. Zeroth and first Law of Thermodynamics 6. Second Law of Thermodynamics: Heat Engines and Entropy 7.Thermodynamical Relationship 8. Production and Measurement of Very Low Temperatures UNIT-IV 9. Radiation