Class 11 Physics Notes Chapter 9 Behaviour of Perfect Gas Class 11 Physics Chapter 9 PDF Class 11 Physics Notes Chapter 9 Behaviour of Perfect Gas. PDF Download Free. Chapter 1 Physics World And Measurement Chapter 2 Kinematics Chapter 3 Law Of Motion Chapter 4 Work Energy Power Chapter 5 Motion Of System Chapter 6 Gravitation Chapter 7 Properties Of Bulk Matter Chapter 8 Thermodynamics Chapter 9 Behavior Of Perfect Gas Chapter 10 Oscillations And Waves