Among the following , the surfactant that will form micelles in aqueous solution at the lowest molar concentration at amibemt conditions, is :
A. `CH_(3)(CH_(2))_(15)N^(+)(CH_(3))_(3)Br^(-)`
B. `CH_(3)(CH_(2))_(11)OSO_(3)^(-)Na^(+)`
C. `CH_(3)(CH_(2))_(6)COO^(-)Na^(+)`
D. `CH_(3)(CH_(2))_(11)N^(+)(CH_(3))_(3)Br^(-)`

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Correct Answer - A
The surfactant cetyl trimethylammonium bromide `CH_(3)(CH_(2))_(15)N^(+)(CH_(3))_(3)Br^(-)` with maximum molecular mass will form micelle at the lowest CMC.

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