What is the importance of micelle formation in the cleansing action of soap?
Answer and explanation
Correct answer: It helps trap dirt inside and disperse it in water
The governing concept is micelle formation by amphiphilic soap molecules. In water, their hydrophobic hydrocarbon tails point inward and attach to oily dirt, while their hydrophilic ionic heads point outward toward water. This arrangement encloses grease in a dispersed droplet. Agitation breaks the dirt into smaller suspended particles, which can then be carried away during rinsing. Therefore option A correctly explains cleansing; the other options describe impossible changes.
Frequently asked questions
What is the correct answer to this question?
It helps trap dirt inside and disperse it in water
Why is this the correct answer?
The governing concept is micelle formation by amphiphilic soap molecules. In water, their hydrophobic hydrocarbon tails point inward and attach to oily dirt, while their hydrophilic ionic heads point outward toward water. This arrangement encloses grease in a dispersed droplet. Agitation breaks the dirt into smaller suspended particles, which can then be carried away during rinsing. Therefore option A correctly explains cleansing; the other options describe impossible changes.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Light Reflection and Refraction. Topic: Image formation.
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