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Which of the following is a cationic detergent?

1. Sodium stearate
2. Cetyltrimethyl ammonium bromide
3. Sodium dodecylbenzene sulphonate
4. Sodium lauryl sulphate

Correct answer: Cetyltrimethyl ammonium bromide

Solution

Cationic detergents are quaternary ammonium salts with a positive charge. Cetyltrimethyl ammonium bromide is a typical example of such a detergent.

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