The mechanism of hydration of ethene to form ethanol involves three steps.
Step 1:Protonation of ethene to form carbocation by electrophilic attack of H3O+:H20+H+\(\rightarrow\)H3O+
Step 2:Nucleophilic attack of water on carbocation:
Step 3:Deprotonation to form ethanol:
Arrange the following compounds in increasing order of their boiling points:

The reaction 
suggests that phenol is :
In the reaction R–OH + HCl $\xrightarrow{\text{ZnCl}_2}$ RCl + H$_2$O, what is the correct order of reactivity of alcohols?