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.

Determine which of the following statements are true. Select (check) the correct statements.

Aldehydes contain a carbonyl group. Aldehydes with more than five carbon atoms are soluble in water, but not organic solvents. Ketones have lower boiling points than hydrocarbons of similar size. Both aldehydes and ketones can hydrogen bond with water molecules. Propanal is a gas at room temperature, whereas formaldehyde (methanal) is a liquid at room temperature. Ethanal has a higher boiling point than ethane.