Question

Milk is an emulsion of water in oil type.
A) True
B) False

Answer 1

Hint:We know that milk contains fats, proteins, lactose which is a sugar and water. The proteins that are present in milk are casein proteins. In milk, the fats, proteins and sugar are suspended in water.

Complete answer
A fine dispersion of minute droplets of one liquid into another liquid in which it is not soluble is known as an emulsion.

Emulsions are of two types:
i) Oil in water emulsion: In these emulsions, oil is the dispersed phase and water is the continuous phase.
ii) Water in oil emulsion: In these emulsions, water is the dispersed phase and oil is the continuous phase.

We know that milk contains fats, proteins, lactose which is a sugar and water. The proteins that are present in milk are casein proteins. In milk, the fats, proteins and sugar are suspended in water.

A colloidal solution in which liquid particles are dispersed in a liquid medium is known as emulsion. Thus, in an emulsion, dispersed particles and the dispersion medium both are in liquid phase.Milk is an emulsion in which fat globules are suspended in water. Casein is a lyophilic (solvent loving) sol. Casein stabilizes the milk emulsion and thus, casein acts as an emulsifier for milk. Milk is an oil in water type of emulsion because fat globules in milk are suspended in water. Thus, milk is an emulsion of oil in water type. So, the statement ‘milk is an emulsion of water in oil type’ is false

Thus, the correct answer is option (B) false.

Note: We know that milk contains fats, proteins, lactose which is a sugar and water. Thus, milk is a mixture of fats, proteins, sugar and water which are mixed irrationally. Thus, milk is not a pure substance or a compound that is made up of one type of atom or molecule. But milk is a mixture of fats, proteins, sugar and water which are mixed irrationally.