Chapter 2: Is Matter Around Us Pure? – NCERT Exemplar Solutions for Class 9 Science
This chapter explores the nature of substances and explains how matter around us may exist as pure substances or mixtures. Students are introduced to the difference between elements, compounds, and mixtures. The concept of homogeneous and heterogeneous mixtures is explained with suitable examples like air, soil, and alloys. The chapter also highlights solutions, colloids, and suspensions with their properties such as the Tyndall effect, stability, and particle size.
Separation techniques like filtration, evaporation, chromatography, distillation, and centrifugation are explained to show how mixtures can be separated into pure components. The chapter also includes the importance of physical and chemical changes in understanding the purity of substances. NCERT Solutions for Class 9 Science help students understand exercises based on practical methods of separation, while NCERT Exemplar Solutions for Class 9 Science provide higher-order questions that improve analytical and reasoning skills. Together, they ensure concept mastery and exam readiness.