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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Surface Chemistry

NTA Abhyas 2020 · Chemistry · Surface Chemistry

Among the following surfactant molecules, the surfactant that forms...

Among the following surfactant molecules, the surfactant that forms micelles in aqueous solution at the lower CMC at ambient condition is

Options

  1. ACH3(CH2)C{H}_{3}{\left(C{H}_{2}\right)}_{15}N^{+}{\left(C{H}_{3}\right)}_{3}Br^{-}
  2. BCH3(CH2)11OSO3−Na+C{H}_{3}{\left(C{H}_{2}\right)}_{11}OS{O}_{3}^{-}Na^{+}
  3. CCH3(CH2)6COO−Na+C{H}_{3}{\left(C{H}_{2}\right)}_{6}COO^{-}Na^{+}
  4. DCH3(CH2)C{H}_{3}{\left(C{H}_{2}\right)}_{11}N^{+}{\left(C{H}_{3}\right)}_{3}Br^{-}

Correct answer

A. CH3(CH2)C{H}_{3}{\left(C{H}_{2}\right)}_{15}N^{+}{\left(C{H}_{3}\right)}_{3}Br^{-}

Step-by-step solution

More is the hydrophobic character in surfactant molecule, lesser is CMC in aqueous solution.
Hydrophobiccharacter∝lengthofcarbonchain\text{Hydrophobic}\text{character} ∝ \text{length}\text{of}\text{carbon}\text{chain}
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