Q. From amongst the following alcohols the one that would react fastest with conc. HCI and anhydrous $ZnCI_{2}$is
A) 2-butanol
B) 2-methyl propan-2-ol
C) 2-methylpropanol
D) 1 butanol
Explanation
(b)
The reaction of alcohol with conc. HCl and anhydrous $ZnCl_{2}$following $S_{N}$1 pathway, so greater the stability of carbocation formed, faster is the reaction.
2-methyl propan-2-ol gives 3${^\circ}$ carbocation.
Hence, it reacts rapidly with conc. HCl and anhydrous $ZnCl_{2}$(Lucas reagent).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.