Mark the Incorrect statement about aldehydes and ketones.

Explanation

Explanation:The correct option is B, they have higher boiling points than that of alcohols.Alcohols have strong intermolecular hydrogen bonding, leading to high boiling points. Aldehydes and ketones, which lack O-H bonds, cannot form hydrogen bonds with themselves and rely on weaker dipole-dipole interactions. Therefore, alcohols have higher boiling points than aldehydes/ketones of similar molecular weight.The other options are incorrect because;Option A: They have higher boiling points than that of alkanes. Alkanes are non-polar and only have weak London dispersion forces. Aldehydes and ketones are polar due to the C=O bond and exhibit stronger dipole-dipole interactions. Thus, they have significantly higher boiling points than alkanes of similar molecular weight. This statement is correct.Option C: They have a lower boiling point than that of carboxylic acids.Carboxylic acids (R-COOH) form very strong dimers via two hydrogen bonds. This results in much higher boiling points compared to aldehydes and ketones of similar size. This statement is correct.Option D: Aldehydes have H-bonding but ketones do not have. This statement is misleading. Both aldehydes and ketones cannot form hydrogen bond with themselves because they lack a hydrogen atom directly bonded to a high electronegative atom like oxygen, nitrogen etc. However, they can form hydrogen bond with water molecules, which is why smaller aldehydes and ketones are soluble in water.