Giving example, state the use of a solution, a colloid and a suspension in our daily life.
Solutions: When two reacting substances are kept in contact, the reaction does not take place or is very slow. But when their solutions are mixed, the reaction takes place very fast. This happens because in solutions, reacting substances come in contact with each other at molecular level. When solid washing soda is poured over clothes, it does not wash but when clothes are mixed with solution of washing soda, clothes are easily cleaned.
Colloids: Some insoluble substances particularly in pharmaceuticals become more effective when administered in colloidal form. Many medicines are insoluble in water but are used in the form of colloids.
Suspensions: Many substances insoluble or sparingly soluble in dispersing medium become useful for analytical purposes when dispersed temporarily. For example, sparingly soluble barium sulphate dispersed in water is an opaque medium and is used for diagnostic X-rays.
