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                  When the long chain of fatty acids like soap and detergent is added to water the hydrophobic part of their chain is aligned towards the centre in such a manner that they form a spherical shape and their hydrophilic part is facing towards outside. This spherical like structure is known as a micelle.            
                    
Structure of sodium soap(Left side - hydrophobic part, Right side- hydrophilic part)
                                                                fig:- Micelle of that sodium soap.
 
                 
                