MolSynapsequestion bank
MolSynapse / Question bank / Alcohols, Phenols and Ethers / Phenols: acidity, Kolbe, Reimer-Tiemann, electrophilic substitution
JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ap106

Which conversions of phenol can be achieved in a single step?

  1. Aphenol to chlorobenzene by warming with conc. /
  2. Bphenol to phenyl ethanoate with and pyridine
  3. Cphenol to p-benzoquinone with /
  4. Dphenol to benzene with zinc dust (heat)

Answer: B, C, D

Zinc dust removes the oxygen of phenol to give benzene. Oxidation with sodium dichromate in acid gives p-benzoquinone. Phenol is esterified readily by an acyl chloride. The phenolic C-O bond has partial double bond character, so the OH cannot be replaced by Cl with /.
Practice Alcohols, Phenols and Ethers More on Phenols: acidity, Kolbe, Reimer-Tiemann, electrophilic substitution

More questions on Phenols: acidity, Kolbe, Reimer-Tiemann, electrophilic substitution