Question

Milk is a mixture. Give reasons.

Answer 1

Milk is a mixture:

• The basic definition of pure substances is that they are substances that are made up of only one type of atom or molecule.
• The physical properties of a pure substance include well-defined melting and boiling points.
• Mixtures can be considered as a combination of different things in which the component elements are individually distinct.
• Pure substances are either elements or compounds while the mixture is a resultant product of any two or more two substances.
• The milk from the cow is a mixture of water, fat, and solids (in the form of milk protein and carbohydrates) which is mixed irrationally.
• The main compounds of milk are lactose and casein and it is also called a colloidal mixture (i.e. in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance).
• Therefore milk is a mixture, not a pure substance.