The compound which reacts fastest with Lucas reagent at room temperature is

Options

A. butan-1-ol
B. butan-2-ol
C. 2-methylpropan-1-ol
D. 2-methylpropane-2-ol

Answer

D

Explanation

By Lucas reagent test we can distinguish between primary , secondary and tertiary alcohols. On reaction with Lucas reagent (Conc. `HCl+` anhy. `ZnCl_2`) at room temperature , tert. alcohol `(2^(@))` give turbidity in 5-10 minutes , primary alcohols `(1^(@))` do not form a turbidity , i.e, the order of reactivity is ` 3^(@) gt 2^(@) gt 1^(@)`. 2-Methylpropan-2-ol is a tertiary alcohol and will react fastest .