While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.
Intramolecular H-bonding is present in o-nitrophenol.In p-nitrophenol, the molecules are strongly associated due to the presence of intermolecular bonding. Hence,o-nitrophenol is steam volatile.

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?