Which of the following cannot be used to prepare an emulsion of benzene in water?
A
CH3−(CH2)9−(SO3)−Na+
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B
CH3−(CH2)9−COO−Na+
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C
CH3−(CH2)9−NH+3Cl−
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D
(CH3)4+NBr−
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Solution
The correct option is C(CH3)4+NBr− Surface active agents are used as emulsifiers. The surface-active agents must have a hydrophobic chain with carbon atoms ≥ 5. So, D option is correct.