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JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Colloids Emulsion, Gel and Their properties with application

  • question_answer
    Oils and fats are obtained by saponification of potassium stearate. Its formula is \[C{{H}_{3}}-{{(C{{H}_{2}})}_{16}}-CO{{O}^{-}}{{K}^{+}}\]. Lyophobic end of atom is \[(C{{H}_{3}})\] and lyophilic end is \[CO{{O}^{-}}{{K}^{+}}\]. potassium stearate is example of  [Kerala CET 2005]

    A)                 Lyophobic colloids          

    B)                 Lyophilic colloids

    C)                 Poly molecular colloids 

    D)                 Macromolecular colloids

    E)                 Combined colloids or Miscells

    Correct Answer: E

    Solution :

                    The substance, whose molecules associate with given solvent to form colloidal particle known as association colloidal. The molecule of soap & detergent are generally smaller than colloidal particle. These molecules associate in concentration solution to form colloidal size particle. These association of soap & detergent known as miscelle.


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