Which of the following forms cationic micelles above a certain minimum concentration?
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a
Urea
b
Cetyltrimethylammonium bromide
c
Sodium dodecyl sulphate
d
Sodium acetate
answer is B.
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Detailed Solution
colloids which behave as normal electrolytes but exhibit colloidal properties at higher concentration due to formation of aggregated particles called micelles. Micelles are formed by association of dispersed particles above a certain concentration is CMC. Cetyltrimethyl ammonium bromide forms cationic micelles.