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MHT CET202617 April 2026Evening ShiftChemistryHaloalkanes and HaloarenesActual

Identify the product obtained when 2-chlorobutane is heated with aqueous solution of potassium hydroxide.

Options

  1. ABut - 1 - ene
  2. BBut - 2 - ene
  3. CButan - 1 - ol
  4. DButan - 2 - ol

Correct answer

D. Butan - 2 - ol

Step-by-step solution

When an alkyl halide is treated with an aqueous solution of potassium hydroxide (KOH), it undergoes a nucleophilic substitution reaction. The hydroxide ion ( OH^- ) acts as a nucleophile and replaces the halogen atom. For 2-chlorobutane, the reaction proceeds as follows: CH₃-CH(Cl)-CH₂-CH₃ + KOH(aq) CH₃-CH(OH)-CH₂-CH₃ + KCl The chlorine atom at the second carbon is substituted by a hydroxyl group, resulting in the formation of Butan-2-ol. Answer: Butan - 2 - ol

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