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Which of the following is an anionic detergent?
- Cetyltrimethyl ammonium bromide.
- Glyceryl oleate.
- Sodium stearate.
- Sodium lauryl sulphate.
Correct answer: Sodium lauryl sulphate.
Solution
Sodium lauryl sulphate is classified as an anionic detergent because it contains a negatively charged sulfate group, which allows it to effectively reduce surface tension and emulsify oils and fats in water.
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