Draw the structure of 3-methyl-2-hexanone. Select Draw Rings / |||||| co H More Erase Q2 Q Both aldehydes and ketones contain carbonyl groups. In aldehydes, the carbonyl carbon atom is bonded to a hydrogen atom, whereas in ketones, the carbonyl carbon atom is bonded to another carbon atom. Select the true statements about aldehydes and ketones. Butanal has a higher boiling point than 2-butanol. Aldehydes contain a carbon-oxygen double bond. Both aldehydes and ketones can hydrogen bond with water molecules. Ketones have lower boiling points than alcohols of similar size. Aldehydes with more than five carbon atoms are soluble in water, but not organic solvents. Propanal is a gas at room temperature, whereas formaldehyde (methanal) is a liquid at room temperature