Which of the following options are correct?

Options

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

Answer

B, C

Explanation

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.