Question Detail
Question
Rank the following molecules in decreasing order of boiling points :
Correct Answer
Option A is the correct answer.
Detailed Explanation
Hydroxyl groups can form intramolecular H-bonds in the ortho position than in meta or para positions. These intramolecular H-bonds decrease boiling point. Therefore, compound (3) has a higher boiling point than compound (2). Compound (2), with two hydroxyl groups, has a still higher boiling point than phenol.
Hint
How do intramolecular hydrogen bonds affect boiling points?