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JEE Main 202226 JulyMorning Shift
Exam
JEE Main
Year
2022
Date
26 July
Shift
Morning Shift
Subject
Chemistry
Chapter
Chemistry in Everyday Life

JEE Main 2022 · 26 July · Morning Shift · Chemistry · Chemistry in Everyday Life

Stearic acid and polyethylene glycol react to form which one of the...

Stearic acid and polyethylene glycol react to form which one of the following soap/s detergents?

Options

  1. ACationic detergent
  2. BSoap
  3. CAnionic detergent
  4. DNon-ionic detergent

Correct answer

D. Non-ionic detergent

Step-by-step solution

Non-ionic detergents do not contain any ion in their constitution. One such detergent is formed when stearic acid reacts with polyethylene glycol.

CH3(CH2)16COOHStearicacid+HO(CH2CH2O)nCH2CH2OHPolyethyleneglycol→−H2OCH3(CH2)16COO(CH2CH2O)nCH2CH2OH\mathop{{CH}_{3}{\left({CH}_{2}\right)}_{16}COOH}_{Stearicacid} + \mathop{HO{\left({CH}_{2}{CH}_{2}O\right)}_{n}{CH}_{2}{CH}_{2}OH}_{Polyethyleneglycol}\overset{- {H}_{2}O}{\to}{CH}_{3}{\left({CH}_{2}\right)}_{16}COO{\left({CH}_{2}{CH}_{2}O\right)}_{n}{CH}_{2}{CH}_{2}OH

A type of detergent in which the active part of the molecule is a positive ion (cation). Cationic detergents are usually quaternary ammonium salts.

Anionic detergent is a synthetic detergent in which a lipophilic hydrocarbon group of the molecule is an anion. A detergent molecule consists of a long hydrocarbon chain and a water-soluble negative ionic group.

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