JEE Main · 2022 · 29 Jul 2022 · Shift 2 · Alcohols Phenols and Ethers

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When ethanol is heated with conc. , a gas is produced. The compound formed, when this gas is treated with cold dilute aqueous solution of Baeyer's reagent, is :
  1. (A)Formaldehyde
  2. (B)Formic acid
  3. (C)Glycol✓ Correct
  4. (D)Ethanoic acid

Answer: (C)

Solution

Ethanol heated with concentrated undergoes dehydration to form ethene (). When ethene is treated with cold dilute Baeyer's reagent (alkaline ), it undergoes syn-dihydroxylation to form ethane-1,2-diol (ethylene glycol, ). The correct answer is glycol.

JEE Main · 2022 · 29 Jul 2022 · Shift 2 · Single correct option

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