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JEECUP (UP Polytechnic) Preparation from Alcohols — practice questions

Explore 1 free Preparation from Alcohols questions in JEECUP (UP Polytechnic) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Among alcohols, the reactivity order with HX (e.g. HCl) is:Read the answer and worked solution →

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Among alcohols, the reactivity order with HX (e.g. HCl) is:

  1. 1° > 2° > 3°
  2. 3° > 2° > 1° (tertiary fastest via stable carbocation)
  3. All equal
  4. Aromatic > aliphatic
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Correct answer: B. 3° > 2° > 1° (tertiary fastest via stable carbocation)

S$_N$1 mechanism: 3° alcohol → 3° carbocation (most stable due to hyperconjugation and inductive effects). 3° > 2° > 1°. Methanol/ethanol need more forcing conditions or different mechanism (S$_N$2).

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More Chemistry topics

Ideal and Non-Ideal SolutionsIdeal SolutionsNon-Ideal SolutionsReactions in Aqueous SolutionElectrochemistryElectrochemical SeriesCoordination CompoundsSolutions