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Which of the following options are correct?A. Micelle formation by soap in aqueous solution is possible at all temperaturesB. Micelle formation by soap in aqueous solution occurs above a particular concentrationC. On dilution of soap solution micelles may revert to individual ionsD. Soap solution behaves as a normal strong electrolyte at all concentrations |
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Answer» Correct Answer - B::C Micelle formation Some substances at low concentration behaves as a normal electrolytes but at higher concentration exhibit colloidal behaviour due to formation of micelles. CMC (Critical Micelle Concentration ) The concentration above which it behaves as a micelle known as critical micelle concentration (CMC). e.g., soap solution in aqueous solution above particular concentration (called CMC `=10^(-4)-10^(3) moL^(-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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