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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3el232

Select all correct statements about the compound shown.

  1. AIt contains a thioether linkage
  2. BIt contains a sulphonic acid group
  3. CIt contains two phenolic OH groups
  4. DIt is added to some soaps for its antiseptic action

Answer: A, C, D

The compound shown is bithionol: two 2-hydroxy-3,5-dichlorophenyl rings joined by a divalent sulphur (thioether). The two OH groups are phenolic. The sulphur is a sulphide, not a sulphonic acid. Bithionol is used as an antiseptic additive in medicated soaps.
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