Soaps | Class XII

Soaps: It is a sodium or potassium salts of long chain fatty acids like stearic, oleic and palmitic acid. This reaction…

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Evolution | Theories of Biological Evolution | Class XII

1. Theory of Inheritance of Acquired Character-By Lamarck (French naturalist) – 1809 Book- Philosophic Zoologique It states that evolution of…

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Properties of colloids | Class XII

Positively charged colloidal particles:These include hydrated metallic oxides such as Fe2O3.H2O, Cr2O3.H2O, Al2O3.H2O Basic dye stuff like malachite green, methylene…

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