Skip to content
ChemistryNEET 2024Preparation and reactions of alcohols

Alcohols, Phenols and Ethers

Which one of the following alcohols (three drawn as structures; the fourth is CH3CH2CH2CH2OH\mathrm{CH_3CH_2CH_2CH_2OH}) reacts instantaneously with Lucas reagent?

Question 61 as printed in the NEET 2024 booklet

  1. A.Structure (1)
  2. B.Structure (2)
  3. C.Structure (3)✓
  4. D.CH3–CH2–CH2–CH2OH\mathrm{CH_3\text{–}CH_2\text{–}CH_2\text{–}CH_2OH}

Solution

The Lucas test turns turbid instantly only with tertiary alcohols, which form a stable tertiary carbocation. 2-Methylpropan-2-ol, (CH3)3C−OH\mathrm{(CH_3)_3C{-}OH} (structure 3), is tertiary; (1) is secondary and (2), (4) are primary.

Save for spaced revision (free account)

More from this chapter in past papers

From Chemistry › Alcohols, Phenols and Ethers › Preparation and reactions of alcohols — lectures, notes and every past question on it.

Last revised . Found a mistake? Tell us — corrections are the fastest thing we act on.

ShareWhatsAppTelegram