Aldehydes, ketones, and alcohols can consist of a carbon chain (or ring) with on

Question

Aldehydes, ketones, and alcohols can consist of a carbon chain (or ring) with one oxygen atom per molecule. Which statement is accurate? a. The boiling points of aldehydes and ketones are generally lower than alcohols with the same number of carbon atoms. b. Aldehydes and ketones generally form stronger hydrogen bonds than alcohols. c. Aldehydes, ketones, and alcohols generally have lower boiling points than alkanes with the same number of carbon atoms. d. Aldehydes and ketones are too polar to dissolve in nonpolar solvents. Aldehydes, ketones, and alcohols can consist of a carbon chain (or ring) with one oxygen atom per molecule. Which statement is accurate? a. The boiling points of aldehydes and ketones are generally lower than alcohols with the same number of carbon atoms. b. Aldehydes and ketones generally form stronger hydrogen bonds than alcohols. c. Aldehydes, ketones, and alcohols generally have lower boiling points than alkanes with the same number of carbon atoms. d. Aldehydes and ketones are too polar to dissolve in nonpolar solvents.

Explanation / Answer

Answer is A

Reason

Alcohol contains an OH group allowing for hydrogen bonding which is stronger than other intermolecular forces. Aldehydes and ketones have a C=O but no H bound to the oxygen (therefore no hydrogen bonding). Aldehydes and ketones are polar due to this C=O bond and therefore have stronger intermolecular forces than hydrocarbons making their boiling points higher

The boiling points of aldehydes and ketones are generally lower than alcohols with the same number of carbon atoms.

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