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Question: Answered & Verified by Expert
Amongst the following alcohols which would react fastest with conc. $\mathrm{HCl}$ and $\mathrm{ZnCl}_2$ ?
ChemistryAlcohols Phenols and EthersJEE MainJEE Main 2013 (22 Apr Online)
Options:
  • A
    pentanol
  • B
    2-methyl butanol
  • C
    2-pentanol
  • D
    2-methyl butan-2-ol
Solution:
1235 Upvotes Verified Answer
The correct answer is:
2-methyl butan-2-ol
$\mathrm{ZnCl}_2+$ conc. $\mathrm{HCl}$ is Lucas reagent. Lucas reagent reacts fastest with tertiary alcohol. $3^{\circ}$ alcohol $+$ Lucas reagent $=$ Immediate turbidity

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