A. sodium dodecyl sulphate
B. sodium acetate
C. urea
D. cetyltrimethyl ammonium bromide
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Correct Answer – D
Cetyltrimethylammonium bromide forms cationic micelles 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 `(-COO^(-))` at one end and on other end, it has `N^(+)` ion, thus cationic micelle is formed.
Correct Answer – D
`R(NH_3)_(3) Br rarr R (NH_3)_(3)^(+) + Br`
Alkyl trimethyl amonium ion aggregates to form cationci micelle.
Correct Answer – D
Sodium acetate forms cationic micelles in the molecule of soap and detergen the negative ions aggregate to from a micelle of colloidal size . The negative ion has a long hydrocarbon chain and a polar group `(-COO)` at one end.
Correct Answer – D