Why does a layer form on the milk when heated? Why do milk cuddle when salt is put into it?
Why does a layer form on the milk when heated? Milk is a combination of many substances. Milk contains atoms, clusters or assemblies or aggregates of atoms. Basing on them milk is classified as a colloid liquid. Milk contains carborate particles like Lactose and Maltose. Some proteins and fat globules are also found in milk. These are the substances that give white colour to milk. When the milk is heated some particle come closer to each other and become big particles. Layer is formed because of this. Since the density of this layer is less than the density of milk, this comes up to the surface of milk.
Why does milk curdle when salt is added to it? When salt is added to milk the particles in it curdle like fiber. Because sodium and chloride ions present in salt destroys the negative charged particles of the milk. This state is called curdling