Write answers in one sentence each :
Cleansing action of soap is based on which principle ?

Explanation

**Step-by-Step Text Solution:**

1. The cleansing action of soap is based on the principle of micelle formation.
2. When soap is added to water, it dissolves and forms micelles, which are aggregates of soap molecules.
3. The hydrophobic (water-repelling) tails of the soap molecules attach to dirt and grease, while the hydrophilic (water-attracting) heads remain in the water.
4. This allows the dirt and grease to be encapsulated in the micelles, which can then be rinsed away with water.
5. Thus, the soap effectively removes dirt and grease from surfaces, demonstrating its cleansing action.

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