What is Colloid?
Colloids are extremely small particles. They can be solid or liquid. If you do not know what they are dont feel bad, the word “Colloid” was not even invented until 1860 and before 1849 nobody even speculated that Colloids existed. The phenomenon of “Colloidal Suspension” was initially not understood, and was finally explained in 1925. However, even before Colloids and Colloidal Suspension were fully understood, they were used for lubrication purposes since 1908. Colloidal particles are about 10-7 to 5×10-5 cm in diameter (From 0.01 to 5 microns). To “see” colloids you need at least 100x power microscope to notice them, 400x power microscope to get a better view and 1,000x power or better “ultramicroscope” to examine them individually. Colloids are larger than most inorganic molecules and remain suspended indefinitely. They are large molecules, such as proteins, or groups of molecules. They have many properties, depending on their large specific surface. Although individual colloids are
