Is Matter Around Us Pure – Class 9 Science
The chapter “Is Matter Around Us Pure” in Class 9 Science explains the difference between pure substances and mixtures. A pure substance consists of only one kind of particle, such as elements (iron, copper, oxygen) or compounds (water, carbon dioxide, salt). On the other hand, mixtures contain two or more substances combined physically, like air, milk, and soil.
Students also learn about types of mixtures: homogeneous mixtures (uniform composition, e.g., sugar in water) and heterogeneous mixtures (non-uniform composition, e.g., sand in water). The chapter highlights methods of separation such as filtration, evaporation, distillation, chromatography, and centrifugation.
These techniques are useful in daily life and industries for obtaining pure substances from mixtures. This chapter builds a strong base for chemistry by helping students understand composition, properties, and methods of purification of matter around us. NCERT Class 9 makes the concepts simple with examples and activities.
