Which of the following has the highest boiling point?

$HBr$ reacts fastest with

Which of the following is a tertiary allylic alcohol?

Which of the following alcohols reacts most rapidly with hydrogen halides?

An alcohol having molecular weight $74$ gives white turbidity with Lucas reagent within $5-10$ minutes. It reacts with sodium metal to give $Y$. $Y$ reacts with $CH_3-Br$ to give $Z$. $Z$ is:

$CH_3CH_2OH + HX \xrightarrow{ZnX_2} CH_3CH_2 - X + H_2O$. What is the reactivity order of $HX$?