A) Sodium ethyl sulphate
B) Sodium acetate
C) Urea
D) Cetyltrimethylammonium bromide
Correct Answer: B
Solution :
Sodium acetate forms cationic micells above a certain concentration. In the molecule of detergents and soap, the negative ions aggregate to form a micelle of colloidal size. In polar medium (like water), the negative ion has a long hydrocarbon chain and a polar group\[\left( \text{CO}{{\text{O}}^{-}} \right)\] at one end and on other end, it has\[N{{a}^{+}}\] ions, thus cationic micelle is formed.
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