1.

Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is

Answer»

`CH_(3)(CH_(2))_(15)N^(+)(CH_(3))_(3)Br^(-)`
`CH_(3)(CH_(2))_(11)OSO_(3)^(-)Na^(+)`
`CH_(3)(CH_(2))_(6)COO^(-)Na^(+)`
`CH_(3)(CH_(2))_(11)N^(+)(CH_(3))_(3)Br^(-)`

SOLUTION :During micelle formation, number of ions decreases as a result of which conductance reduces. The formation of micelles THUS also reduces the osmotic pressure thereby increasing the average MOLAR MASS of the hydrocarbon chain of the surfactant.


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