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MHT CET202620 April 2026Morning ShiftChemistryAlcohols Phenols and EthersActual

Identify product 'B' in following series of reactions 2-methylpropan-2-ol [ 363 K ] 20 % H ₂ SO ₄ A [ Conc. H ₂ SO ₄ ] H ₂ O B

Options

  1. An-Butylalcohol
  2. Bsec-Butylalcohol
  3. CIso-butylalcohol
  4. Dtert-Butylalcohol

Correct answer

D. tert-Butylalcohol

Step-by-step solution

The starting material, 2-methylpropan-2-ol, is a tertiary alcohol. On heating with 20 %H₂SO₄ at 363 K , it undergoes acid-catalyzed dehydration to form an alkene, 2-methylpropene (product A). (CH₃)₃C-OH H^+, (CH₃)₂C=CH₂ + H₂O Product A is 2-methylpropene. When 2-methylpropene is treated with water in the presence of concentrated H₂SO₄ and heat, it undergoes acid-catalyzed hydration. The addition of water follows Markovnikov's rule, proceeding via the formation of a stable tertiary carbocation. (CH₃)₂C=CH₂ + H^+ (CH

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