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Answer: 3. Cetyltrimethyl ammonium bromide

Cationic detergents have a positively charged head group, usually a quaternary ammonium salt. Cetyltrimethylammonium bromide, \(\mathrm{[CH_3(CH_2)_{15}N(CH_3)_3]^+Br^-}\), is cationic.

Sodium lauryl sulphate and sodium dodecylbenzene sulphonate are anionic. Sodium stearate is soap (anionic). Answer: option (3).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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