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Anionic surfactants are...

Anionic surfactants are

A

`C_(15)H_(31)COONa`

B

C

`C_(18)H_(37)NH_(3)Cl`

D

All

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The correct Answer is:
To determine which of the given options are anionic surfactants, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Definition of Surfactants**: - Surfactants are compounds that lower the surface tension between two substances, such as oil and water. They typically have a dual nature, consisting of a hydrophilic (water-loving) head and a hydrophobic (water-hating) tail. 2. **Identify Anionic Surfactants**: - Anionic surfactants are a type of surfactant where the hydrophobic part of the molecule carries a negative charge (anion). This means that the tail of the surfactant is negatively charged. 3. **Analyze the Given Options**: - We will evaluate each option to determine if it contains an anionic surfactant. - **Option A**: C15S34 C=O⁻ - The presence of a negatively charged carboxylate group (C=O⁻) indicates that this is an anionic surfactant. Therefore, Option A is an anionic surfactant. - **Option B**: R SO3⁻ - The presence of a sulfonate group (SO3⁻) indicates that this is also an anionic surfactant. Therefore, Option B is an anionic surfactant. - **Option C**: C18S37 NH3⁺ Cl⁻ - In this option, the presence of a positively charged ammonium group (NH3⁺) means that this is not an anionic surfactant. Therefore, Option C is not an anionic surfactant. 4. **Conclusion**: - Based on the analysis, Options A and B are identified as anionic surfactants, while Option C is not. ### Final Answer: - The anionic surfactants from the given options are **Option A and Option B**. ---
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