question_answer

Which one of the following forms micelles in aqueous solution above certain concentration? [AIPMT (S) 2005]

A) Urea     

B)                              Dodecyl trimethyl ammonium chloride

C) Pyridinium chloride

D) Glucose

Correct Answer: B

Solution :

[b] Surfactants detergents form micelles in aqueous solution above to their C.M.C (critical micelle concentration). Dodecyl trimethyl ammonium chloride is an example of surfactant (cationic surfactant), so it shows a following phenomena.