Class 9 Science Chapter 5, Exploring Mixtures and their Separation, starts with two questions: how white sugar crystals come out of green sugarcane, and how a few drops of blood are enough to test for malaria. Both depend on separating mixtures, which this chapter covers in depth, from solutions and concentration to chromatography, colloids and the Tyndall effect.
What Class 9 Science Chapter 5 Covers
5.1 and 5.2 Mixtures and Solutions classify mixtures as homogeneous or heterogeneous and work with the concentration of a solution and solubility.
5.3 Separating Homogeneous Mixtures covers crystallization, distillation of two miscible liquids, and paper chromatography.
5.4 Separating Heterogeneous Mixtures covers the separating funnel for immiscible liquids, sublimation, suspensions with centrifugation, and colloids with coagulation.
5.5 Tyndall Effect explains why the particles of a colloid or suspension scatter a beam of light while a true solution does not.
Exercises in Chapter 5
- Revise, Reflect, Refine includes concentration problems, such as comparing 20 g of sugar in 80 g of water with 20 g in 100 g and 30 g in 80 g.
- The Journey Beyond: growing crystals of salt, Epsom salt or sugar, using chromatography to look for green pigment in red leaves, and demonstrating the Tyndall effect.
Read Class 9 Science Chapter 5 Online
More Chapters
- Previous: Chapter 4: Describing Motion Around Us
- Next: Chapter 6: How Forces Affect Motion
- Hindi medium: Class 9 Science Chapter 5 PDF in Hindi (Anveshan)
- All Science chapters and the other Class 9 books: Class 9 NCERT books 2026-27
FAQ
What is the Tyndall effect?
The scattering of a light beam by the particles of a colloid or suspension, which makes the path of the light visible. A true solution does not show it.
Which separation methods are in Class 9 Science Chapter 5?
Crystallization, distillation, paper chromatography, separating funnel, sublimation, centrifugation and coagulation.