NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice
Consider the following substances 1 . Propan-2-ol 2 . Prpanone 3 . 2-methyl propene The correct sequence of increasing order of boiling point is
Options
- A1 > 2 > 3
- B1 > 3 > 2
- C2 > 1 > 3
- D3 > 2 > 1
Correct answer
A. 1 > 2 > 3
Step-by-step solution
The high b.p. of the alcohol is due to intermolecular H-bonding. Carbonyl compounds and alkene have no H's for H-bonding. The dipole-dipole forces of carbonyl compounds cause them to have higher boiling points than alkene. Hence, the correct sequence of increasing order of boiling point is 1 > 2 > 3.