QUIZ 1. What is not a characteristic feature of a ketone? a. Carbonyl group b. Resonance between carbon and hydrogen c. Acidity d. Double bonding Answer: c. These are all features of ketones, with the exception of acidity. Ketones are generally not acidic unless they have a particular functional group on them. 2. What is not a difference between the carbonyl double bond in a ketone and the carbon-carbon double bond in an alkene? a. The ketone involves a pi bond, while the alkene double bond does not. b. The ketone double bond is polar, while the alkene double bond is not. c. There is greater energy in the double bond of the ketone compared to the C-C double bond. d. The reaction with water proceeds more rapidly in a ketone than in an alkene. Answer: a. Both of these bonds involve both a sigma bond and a pi bond, making for a relatively stable double bond. 3. What is the common name for the aldehyde called ethanal? a. Butyraldehyde b. Formaldehyde c. Metaldehyde d. Acetaldehyde Answer: d. Acetaldehyde is a two-carbon aldehyde that contains a methyl group and the carbonyl group. It can be made from acetic acid.
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