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Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because:

1. soap particles remain floating in water as ions.
2. the hydrophobic part of soap is not able to take away grease.
3. the micelles are not formed due to concentration of soap, below its CMC value.
4. colloidal structure of soap in water is completely distributed.

Correct answer: the micelles are not formed due to concentration of soap, below its CMC value.

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