Which of the following should be most volatile?

Options

A. II
B. IV
C. I
D. III

Answer

B

Explanation

`1^(@) and 2^(@)` mines have highest boiling points due to Intermotecular H-bonding but less volatile than `3^(@)` amines and hydrocarbons of comparable motecutar mass. Further because of polar C-N bonds. `3^(@)` amines are more polar than hydrocarbons which are almost non-polar. Hence. due to weak dipole-dipole interacuons. `3^(@)` amines have higher boiling point (i.e.. less volatile) than hydrocarbons. ln other words hydrocarbon are more volatile among given compounds as amine are less volatile than hydrocarbon.