Q.
Explain, why o-hydroxybenzaldehyde is a liquid at room
temperature while p-hydroxybenzaldehyde is a high melting
solid?
Solution:
Intramolecular H-bonding in ort/io-hydroxybenzaldehyde
decreases its melting point as well as boiling point.
Molecules of p-hydroxybenzaldehyde is symmetrical,
associated together by intermolecular H-bonds, has higher
boiling point and melting point.
