Which of the following will have the highest boiling point?

Explanation

The compound with the highest boiling point is (d) hexanone.Here's a breakdown of the factors influencing boiling points and why the other options are incorrect:Intermolecular Forces:• Strength of intermolecular forces is crucial in determining boiling points. Stronger forces require more energy to separate molecules, leading to higher boiling points.• The primary intermolecular forces in these compounds are dipole-dipole interactions (due to the polar carbonyl group) and London dispersion forces (which increase with molecular size).Molecular Size:• Larger molecules generally have greater surface areas, allowing for more extensive London dispersion forces.• Hexanone, with six carbon atoms, is significantly larger than methanal, ethanal, and propanal, which have one, two, and three carbon atoms, respectively.Structure:• Ketones (like hexanone) tend to have slightly higher boiling points than aldehydes of similar molecular size due to greater steric hindrance around the carbonyl group. This hindrance restricts rotation and makes it harder for molecules to break free from each other.