Which one of the following forms micells in aqueous solution above certain concentration?

Options

A. Glucose
B. Urea
C. Dodecy trimethyl ammonium chloride
D. Pyridinimum chlroide

Answer

C

Explanation

When molecules or ions that have both a hydrophobic and a hydrophilic end are dispersed in water, they associate or aggregate to from colloidal sized particles called micelles. Micelle is a colloidal-sized particles or ions that each have a hydrophobic end and a hydrophilic end. The hydrophobic ends point inward toward one another and hydrophilic ends are non the outside of the micelle facing the water. A colloidal in which the dispersed phase consists of micelles is called an associated colloid. Dodecyl trimethyl ammonium chloride (a cationic surfactant) in water provides an example of an association colloid which forms micelles (positively charged) above its `CMC` ,