Class 7 chapter 5 Acids ,bases and Salts ppt 2 Class 7 chapter 5 Acids ,bases and salts ppt 1 Class 10 chapter 3 light topic 3.6 Class x chapter 3 light topic 3.5 ppt 5 Class x chapter 3 topic 3.4 CLASS-X SUBJECT-SCIENCE CHAPTER-LIGHT PPT 3 Class X Subject: Science, Chapter 3 : Light, Presentation 3.2 Class X Chapter 3: Light Topic 3.1 Class 7 chapter 4 Heat :Sea and land breeze,clothes 
