Question

The cleansing action of soaps happens with the formation of micelles above the Critical Micelle Concentration. This occurs at:

• A. Above Critical Micelle Temperature
• B. Below Critical Micelle Temperature
  
• C. Equal Critical Micelle Temperature
• D. None of the above

Answer 1

The correct option is A Above Critical Micelle Temperature

A molecule of soap has two dissimilar ends. At one end is the hydrocarbon chain, which is water repellent and the other end is carboxylate anion which is polar end.
When soap is dissolved in water, many molecules come together and from a group called micelle. These micelles are formed because their hydrocarbon chains come together and the polar ends are projected outward.
When a Cloth with a spot of oil is soaked into a soap solution, soap dissolves tiny oil droplets by the hydrophobic end in the middle of the micelle. Due to the outer polar ends, these micelles dissolve in water and are washed away. In this way cloth gets cleaned