Class 10 NBF Chemistry(New Book) Notes – Chapters Exercises, MCQs, Short & Long Questions
Chapter 1: History of Chemistry 1.1 Multiple Choice Questions 1.2 Short Response Questions 1.3 Long Response Questions 1.4 Summary of Key Concepts Concept Description Conservation of Mass Mass constant in reactions (Lavoisier) Phlogiston Theory 18th-century combustion paradigm Oxygen Theory Lavoisier’s replacement: combustion with oxygen Rutherford Model Nucleus with orbiting electrons Periodic Table Organizes elements by … Read more