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JEE Main levelSingle correct optionDifficulty 2 of 3el177

A non-ionic detergent is obtained by reacting stearic acid with polyethylene glycol. The functional group that joins the hydrophobic tail to the hydrophilic chain in it is

  1. Aan ester group
  2. Ba sulphonate group
  3. Can ether group formed from the carboxyl carbon
  4. Dan amide group

Answer: A

The carboxyl group of stearic acid condenses with a terminal of polyethylene glycol, giving . The linkage between tail and chain is therefore an ester. The polyether part supplies hydrophilicity without any ions.
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