Question

Micelles are:
$A.$ Adsorbed
$B.$ Ideal solution
$C.$ Gel
$D.$ Associated colloids

Answer 1

Hint: In an aqueous solution, molecules having both the polar and nonpolar region (amphiphilic molecules) form an aggregate called micelle. There are many types of micelles on the basis of size,

Complete step by step answer:
Micelles are also called associated colloids. Colloid which behaves as normal electrolyte at low concentration, but exhibits colloidal properties at higher concentration due to the formation of aggregated particles called Associated colloidal. These aggregated particles thus formed are called micelles. In a micelle there are two parts one is polar and another one is non-polar, the polar part is known as head whereas the nonpolar part is called tail of the micelles.
Formation of micelles: Micelles are formed by self-assembly of amphiphilic molecules. The structure contains polar and nonpolar regions. Micelles are formed in aqueous solution whereby the polar region faces the outside surface of the micelle and the non polar forms the core.
Thus the correct option is $D.$

Additional information
Ideal solution: A solution in which the interaction between molecules of the components doesn’t differ from the interaction between the molecules of each component. Ideal solution that conforms exactly to Raoult's law.
Gel: gel is a colloidal in which dispersion phase is solid and dispersion medium is liquid or gas. For example jelly and glue. A gel is a semi solid that can have properties ranging from soft and weak to hard and tough.

Note:
The associated colloids are usually formed by surfactants like soap and detergent .The molecules of soap and detergent are smaller than the colloidal particles. When dissolved in water soap molecules act as an electrolyte but if their concentration is increased then their molecules aggregate to form colloidal size particles called Micelles