MolSynapsequestion bank
MolSynapse / Question bank / Alcohols, Phenols and Ethers / Lucas test and oxidation of drawn alcohols
JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ap247

Choose all correct statements about the alcohol shown.

  1. AWith Lucas reagent at room temperature it becomes turbid immediately.
  2. BPyridinium chlorochromate oxidises it to a ketone.
  3. CHeating with concentrated gives mainly 2-methylbut-2-ene.
  4. DIt gives a positive iodoform test.

Answer: A, C

The alcohol is 2-methylbutan-2-ol, a tertiary alcohol. It forms the tertiary cation at once, so it is turbid immediately (A). It has no carbinol hydrogen, so PCC does not oxidise it (B wrong). Acid dehydration follows Saytzeff and gives 2-methylbut-2-ene (C). It lacks the unit, so D is wrong.
Practice Alcohols, Phenols and Ethers More on Lucas test and oxidation of drawn alcohols
Previous questionNext question

More questions on Lucas test and oxidation of drawn alcohols