23. 23 20. 20 21. 22. Aldehydes have higher boiling points than alkanes of similar mass because of A) hydrogen bonding. B) dipole-dipole interactions. C) ionic bonding. D) covalent bonding. E) oxygen bonding. Which of the following would not be water soluble? A) acetone B) propanal C) 3-heptanone D) formaldehyde E) 2-butanone The hydrogenation of 2-methylpropanal gives the product A) 1-butanol. B) 2-methylpropanoic acid. C) 2-methyl-3-propanol. D) 2-methyl-1-propanol. E) 2-methyl-2-propanol. The Tollens test may be used to distinguish A) acids from amines. B) esters from acids. C) ketones from alcohols. D) aldehydes from ketones. E) alcohols from alkenes. An acetal is formed from two molecules of an alcohol and a(n) A) aldehyde. B) ether. C) carboxylic acid. D) alkyl ether. E) ester.