Hello Aspirant,

The best example of coagulation is the clotting of blood. When you have cuts or wounds you can observe that it turns viscous or semi solid from it's usual liquid state. This is to prevent excessive blood loss from the body. This is what coagulation refers to with respect to medical science. However, if you are referring to coagulation in a general sense most times it is referring to a process in water treatment. Coagulants like Alum are used to purify water. These substance helps remove suspended impurities which cannot be removed by straining/filtration. Hope this helps