JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

  • question_answer
    Under ambient conditions, which among the following surfactants will form micelles in aqueous solution at lowest molar concentration? [JEE Main Online Paper (Held On 11 April 2015)]  

    A) \[C{{H}_{3}}{{(C{{H}_{2}})}_{15}}\overset{\oplus }{\mathop{N}}\,{{(C{{H}_{3}})}_{3}}B\overset{\Theta }{\mathop{r}}\,\]

    B) \[C{{H}_{3}}-{{(C{{H}_{2}})}_{13}}-OSO_{3}^{-}N{{a}^{+}}\]

    C) \[C{{H}_{3}}-{{(C{{H}_{2}})}_{8}}-COO{{O}^{\Theta }}N{{a}^{+}}\]

    D) \[C{{H}_{3}}{{(C{{H}_{2}})}_{11}}\overset{\oplus }{\mathop{N}}\,{{(C{{H}_{3}})}_{3}}B{{r}^{-}}\]

    Correct Answer: A

    Solution :

    \[C{{H}_{3}}{{\left( C{{H}_{2}} \right)}_{15}}\overset{\oplus }{\mathop{N}}\,{{\left( C{{H}_{3}} \right)}_{3}}B{{r}^{-}}\]will form micelles in aqueous solution at lowest molar concentration.


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