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JEE Main202229 Jul 2022Evening ShiftChemistryAlcohols Phenols and EthersActual

When enthanol is heated with conc. H 2 SO 4 , a gas is produced. The compound formed, when this gas is treated with cold dilute aqueous solution of Baeyer's reagent, is

Options

  1. AFormaldehyde
  2. BFormic acid
  3. CGlycol
  4. DEthanoic acid

Correct answer

C. Glycol

Step-by-step solution

Ethanol undergoes dehydration by heating it with concentrated H 2 SO 4 at 443   K . C 2 H 5 OH → 443   K H 2 SO 4 CH 2 = CH 2 + H 2 O Alkenes on reaction with cold, dilute, aqueous solution of potassium permanganate (Baeyer’s reagent) produce vicinal glycols. Decolorisatlon of KMnO 4 solution is used as a test for unsaturation.

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