Which of the following has the lowest boiling point?
A) butane
B) propanal
C) ethyl methyl ether
D) 1-propanol

Question

Quizplus · Accepted Answer

Butane has the lowest boiling point because its molecules have weak intermolecular forces and are small enough to escape the liquid phase easily at room temperature. Propanal and 1-propanol have higher boiling points due to the presence of polar functional groups that can form stronger intermolecular interactions. Ethyl methyl ether is a slightly larger molecule than butane but still lacks polar functional groups, so it has a higher boiling point than butane but lower than propanal and 1-propanol.

Which of the Following Has the Lowest Boiling Point