Which  of the following Statements  are correct?a) Micelle formation by soap in aqueous solution is possible at all temperatures.b) Micelle formation by soap in aqueous solution occurs above a particular concentration.c) On dilution of soap solution, micelles may revert to individual ions.d) Soap solution behaves as a normal strong electrolyte at all concentrations. 

Which  of the following Statements  are correct?

a) Micelle formation by soap in aqueous solution is possible at all temperatures.

b) Micelle formation by soap in aqueous solution occurs above a particular concentration.

c) On dilution of soap solution, micelles may revert to individual ions.

d) Soap solution behaves as a normal strong electrolyte at all concentrations. 

  1. A

    a and b

  2. B

    b, c and  d

  3. C

    b and c

  4. D

    a, b and d

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    Solution:

    Micelle formation: some substances at low concentration behave as a normal electrolytes but higher concentration exhibit colloidal behavior due to the formation of micelles. CMC (Critical Micelle Concentration): the concentration above which Micelle formation takes place as a micelle known as critical micelle concentration (CMC)Eg.., soap solution in aqueous above particular concentration (called CMC=104103 mol  L-1) forms soap micelles.On dilution soap solution behaves as a normal electrolyte and after adding excess of water intermolecular force of attraction between the soap particles decreases and soap solution micelles may revert to individual ions.

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