Arrange the following compounds in the increasing order of their boiling points:
`CH_(3)CH_(2)CH_(2)CHO, CH_(3)CH_(2)CH_(2)CH_(2)OH, H_(5)C_(2)-O-C_(2)H_(5),CH_(3)CH_(2)CH_(2)CH_(3)`

Options

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

Answer

C

Explanation

The boiling point of butan-1- ol would be highest, due to extensive intermolecular hydrogen bonding. Butanai is more polar than ethoxyethane.
The intermolecular dipole-diple attraction is stronger in the butanal. N-pentane moelcules have only weak van der Waal's forces.
The increasing order of boiling point of the give compounds are `IV lt III lt I lt II`.