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Chapter 1 of Class 10 Chemistry introduces the fundamental concepts of matter. It defines matter as anything that has mass and occupies space, categorizing it into elements, compounds, and mixtures. Elements are pure substances consisting of only one type of atom, while compounds are formed from two or more elements chemically combined in fixed proportions. Mixtures, on the other hand, are physical combinations of two or more substances. The chapter emphasizes properties of matter, including phy...