Thank you for reporting, we will resolve it shortly
Q.
There is a large difference in boiling points of butanal and butan $-1-$ ol due to:
Aldehydes Ketones and Carboxylic Acids
Solution:
In butan $-1-$ ol, $H _{3} C - CH _{2}- CH _{2}- CH _{2}- OH$
intermolecular hydrogen bonding is present due to this, there is a large difference in boiling point