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Which one of the following is NOT a synthetic detergent?

Options

  1. ACH ₃ ( CH ₂ )₁₀ CH ₂ O SO ₃⁻ Na ⁺
  2. B[ CH ₃ ( CH ₂ )₁₅- N - ( CH ₃ )₃ ]⁺ Br ⁻
  3. CCH ₃ ( CH ₂ )₁₆ COO ⁻ Na ⁺
  4. DCH ₃ ( CH ₂ )₁₆ COO ( CH ₂ CH ₂ O )_n CH ₂ CH ₂ OH

Correct answer

D. CH ₃ ( CH ₂ )₁₆ COO ( CH ₂ CH ₂ O )_n CH ₂ CH ₂ OH

Step-by-step solution

A synthetic detergent is the sodium salt of sulphonic acid which has cleansing properties in water. It consists of a long hydrocarbon chain which is hydrophobic and a short ionic part which is hydrophilic. Examples: (i) Sodium lauryl sulphate and (ii) Sodium n-dodecyl sulphate.

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