2. A chemist wishes to increase the acidity of an organic molecule. Which functional group should she add?
A. carboxyl
B. Phosphate
C. amino
D. either A or B
E. either A or C
5. If a molecule contains a carbon to carbon double bond, then it is possible that there could be _________versions of that molecule.
A. enantiomer
B. geometric isomer
C. structural isomer
D. all of the above
E. none of the above
Which of the following are important with respect to functional groups?
A. They confer greater reactivity to the hydrocarbon skeletons to which they attach
B. their properties are unpredictable
C. the alternations to molecular properties associated with their presence is predictable
D. A and B are true
E. A and C are true
7. Which functional groups can act as acids?
A. carboxyl and phosphate
B. carboxyl and hydroxyl
C. amine and phosphate
D. sulfhydryl and hydroxyl
E. aldehyde and ketone
8. If a carbonyl group is substituted for an amino group in a molecule, the molecule would become more:
A. basic
B. acidic
C. polar
D. nonpolar
9. What would be the minimum number of carbons found in a molecule for that molecule to have a structural isomer?
A. 2
B. 3
C. 4
D. 5
E. 6
11. Is a molecule that has an enantiomeric isomer, it is likely that both isomers have biological activity.
A. True
B. False
12. How many different kinds of atoms or functional groups would be covalently bonded to a carbon that showed asymmetry and could exist in enantiomeric isomers?
A. 1
B. 2
C. 3
D. 4
E. 5
13. Structural isomers have the same molecular formulas, but different structural formulas.
A. true
B. false
14. As the number of carbon atoms in a molecule increases, the number of possible structural isomers doesn't vary.
A. true
B. false
15. A hydrocarbon is a molecule that can only contain carbon and hydrogen atoms that have single covalent bonds between them.
A. true
B. false
16. When attempting to predict the behavior of a molecule it is useful to know the relative electronegativities of the atoms/ elements in that molecule.
A. True
B. false
17. The nutritional value of triglycerides that are unsaturated is the same whether the fatty acids are in the cis configuration or the trans configuration.
A. true
B. false