1.Gelatin, when dissolved in water, is a colloid because the protein molecules that compose it, mostly derived from collagen, are much larger than usual dissolved molecules, but they remain evenly dispersed throughout the water. A gel is another type of colloid, where a liquid is dispersed through a solid.
2.Milk is an emulsified colloid of liquid butterfat globules dispersed within a water-based solution
3.Whipped cream is a colloid. It consists of a gas in a liquid, so it is a foam. Sol is a colloidal suspension with solid particles in a liquid. The light is reflected off the large particles and spread out.
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