Which compound will show the highest rate of reaction with Lucas reagent?

B. (CH_3 )_3 COH — The Lucas test rate depends on the stability of the carbocation intermediate formed, which is highest for tertiary alcohols.

JEE Main · ChemistryHard

$Which compound will show the highest rate of reaction with ZnCl_{2} / HCl ?$

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Correct answer: B — $(CH_{3})_{3} COH$

$The reaction with Lucas reagent proceeds via an S_{N} 1 mechanism involving a carbocation intermediate.$
$The rate of reaction is determined by the stability of the carbocation: tertiary > secondary > primary.$
$2-methylpropan-2-ol is a tertiary alcohol, forming a stable tertiary carbocation.$
$Hence the answer is (B).$