Q. Which one of the following forms micelles in aqueous solution above certain concentration ?
A) Urea
B) Dodecyl trimethyl ammonium chloride
C) Pyridinium chloride
D) Glucose
Explanation
[Solution from source] Dodecyl trimethyl ammonium chloride is a cationic surfactant with a long hydrophobic tail and an ionic head, so above the critical micelle concentration it forms micelles. Urea, glucose and pyridinium chloride lack a long hydrophobic chain. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.