5 The fundamental unit of life | Class 9 | PPT Slides (PDF & PowerPoint) POWERPOINT PRESENTATION PDF Slides
2. Is matter around us pure? | Class 9 Science | PDF and Web notes 👉 View PDF Chapter 2: IS MATTER AROUND US PURE? In science, a pure substance means all the particles of that substance have the same chemical properties. E.g., sodium chloride, sugar, etc. In the nor…
