Which of the following should be most volatile?
(i) II
(ii) IV
(iii) I
(iv) III
Option (ii) is the correct answer.
Explanation: The boiling points of 1° and 2° amines are higher than 3° amines because of intermolecular H-Bonding. They are also less volatile than 3° amines and hydrocarbons of similar molecular mass.