Ink in water is a colloid because its particles never settle to the bottom and does not completely dissolve. The particles experience the tyndall effect which perfectly scatters the light that flows through it.
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
Classify the following into true solutions and colloidal solutions :
Ink, Salt solution, Starch solution, Blood, Sugar solution