Cyclohexanol is a

The fastest rate of reaction will be when $R$ is:

$CH_3 CH_2 OH \underset{\text{step-}1}{\stackrel{Cl_2}{\longrightarrow}} CH_3 CHO$ $\underset{\text{step-}2}{\stackrel{3 Cl_2}{\longrightarrow}} Cl_3 CCHO$
In the above reactions,the role of $Cl_2$ in step-$1$ and step-$2$ respectively is:

Of the following alcohols,the one that would react fastest with conc. $HCl$ and anhydrous $ZnCl_{2}$ is,

Product $(B)$ of the above reaction is

Which of the following alcohols reacts fastest with Lucas reagent and turns the solution turbid instantly?