Class 9 science Chapter 3 Notes In hindi || कक्षा 9 विज्ञान पाठ 3 के नोट्स | Class 9 science chapter 3 notes |

 class 9 science chapter 3 Notes in hindi :-  https://drive.google.com/file/d/1YqjjFfQrfESs-8dXtMDEr3R90TbR0Ale/view?usp=sharing