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Question

An ionic micelle is formed on the addition of:


  1. liquid diethyl ether to aqueous NaCl solution

  2. sodium stearate to pure toluene

  3. excess water to liquid

  4. excess water to liquid

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Solution

The correct option is C

excess water to liquid


Explanation for Correct answer:

C) Excess water to liquid

This complex contains long-chain as well as charged heads which are necessary for ion micelle formation. So, the formation of ion micelles requires charged and soluble head with an insoluble tail. The head is hydrophilic(water-loving) in nature while tails are hydrophobic(water-hating), In the structure of micelle, the head points outwards while the tail is inwards due to this structure dirt can be easily trapped.

Explanation for incorrect answer:

A) Liquid diethyl ether to aqueous NaCl solution

No, micelle formation takes place as there is no charged head in liquid diethyl ether and aqueous NaCl solution.

B) Sodium Stearate to pure Toluene

In this solution, sodium stearate contains charged head but the density of toluene is much higher than water. So, the Toluene solution will not form micelle in water.

D) Excess water to Liquid

Both the groups are ion, there is no head and tail present in the complex. So no micelle formation takes place.

Thus, C option is correct.


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