Pair the following A. alkene B. alcohol C. aldehyde D. carboxylic acid E. ester F. ether G. alkyne  CH3-CH2-CH2-CH=O   ______  CH2-CH2-CH2-CH2-CH2-OH  ______  CH3-CH2-CH2-C=O                            OCH3  CH3-CH2-CH2-O-CH2-CH3     CH3-CH2-CH2-C=O                                  OH  CH3-NH-CH2-CH2-CH3   ______    CH3-CH2-CH=CH-CH3   ______

Which of the given functional groups is not present in the following structure?

Please answer the following with explanations.

1. The following molecule contains the functional groups A. secondary amine, secondary alcohol, ketone, carboxylic ester B. amide, primary alcohol, aldehyde, carboxylic acid C. secondary amine, two secondary alcohols, and two ketones D. primary amine, secondary alcohol, ketone, and carboxylic acid The following molecule contains the functional groups 2. A. primary alcohol and primary amine C. secondary alcohol and primary amine 3. A. alkene and secondary alcohol C. ketone and seconary alcohol The following molecule contains the functional groups B. ether and ketone D. ether and alkene 4. The following molecule A. primary amine and ketone C. secondary amine and alkyne NH₂ contains the functional groups B. secondary amine and alkene D. secondary amine and ketone ОН OH B. secondary alcohol and secondary amine D. primary alcohol and secondary amine NH₂ OH