1.

By which one among the following mechanism , soap removes dirt (soil) from cloth ?

Answer»

Soap dissolves the soil as such
Soan reacts with soil and converts them into SOLUBLE silicates
Soap TAKES away the oily part of the soil and thus separates the soil from the cloth
The soap MOLECULES bind with the soil, lift the the soil and keep it suspended which can then be RINSED away

Solution :The soap molecules form micelle arround the dirt particles prevents them from coming together and form AGGREGATES, which form emulsion in water. The hand rubbing or the agitation cause dispersion of the dirt particles throughout the soapy water. These are washed away with water along the with dust particles. in this way dirt are removed from the surface of the cloth.


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