Question:
The commonly used detergent Sodium Lauryl Sulphate is
The commonly used detergent Sodium Lauryl Sulphate is
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SLS SDS is anionic (negatively charged head); Quaternary ammonium compounds (QACs) are cationic; Polysorbates (Tweens) are non-ionic.
Updated On: Sep 15, 2026
- Anionic
- Cationic
- Nonionic
- Neutral
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Surfactants and cleaning detergents are classified based on the electrical charge of their hydrophilic head group in aqueous solution.
Step 2: Detailed Explanation:
Sodium Lauryl Sulphate (SLS, sodium dodecyl sulfate, $\text{CH}_3(\text{CH}_2)_{11}\text{OSO}_3^-\text{Na}^+$) dissociates in water to yield a hydrophobic hydrocarbon tail attached to a negatively charged sulfate polar head group ($\text{R}-\text{OSO}_3^-$).
Because the active surface-active moiety carries a net negative charge, SLS is classified as an anionic detergent.
Step 3: Final Answer:
Hence, Sodium Lauryl Sulphate is an anionic detergent.
Surfactants and cleaning detergents are classified based on the electrical charge of their hydrophilic head group in aqueous solution.
Step 2: Detailed Explanation:
Sodium Lauryl Sulphate (SLS, sodium dodecyl sulfate, $\text{CH}_3(\text{CH}_2)_{11}\text{OSO}_3^-\text{Na}^+$) dissociates in water to yield a hydrophobic hydrocarbon tail attached to a negatively charged sulfate polar head group ($\text{R}-\text{OSO}_3^-$).
Because the active surface-active moiety carries a net negative charge, SLS is classified as an anionic detergent.
Step 3: Final Answer:
Hence, Sodium Lauryl Sulphate is an anionic detergent.
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