Answer:
(b, c)
Micelle formation Some substances
at low concentration behaves as a normal electrolytes but at higher
concentration exhibit colloidal behavior 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
) 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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