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World of Chemistry 102
First Exam
Name ______________________
SPRING 2006
1. (3 pts) When sodium metal is added to water, the following reaction occurs.
2Na + 2H2O  2Na+(aq) + 2OH-(aq) + H2
Identify the substance that is oxidized ______________
Identify the substance that is reduced ______________
Identify the reducing agent
______________
2. (4 pts) Based on their relative positions in the periodic table, which might you
expect to be a better oxidizing agent, Cl2 or I2? Give a reason for your choice.
3. (4 pts) Based on their relative positions in the periodic table, which might you
expect to be a better reducing agent, Na or Cs? Give a reason for your choice.
4. (6pts) Sketch a voltaic cell that uses the oxidation-reduction reaction
Cu(s) + 2Ag+(aq  Cu2+(aq) + 2Ag(s)
Which atom or ion is reduced? ________Which atom or ion is oxidized?________
5. (8 pts) Organic compounds are named according to the functional group each
contains. Illustrate at least four of the eight groups below with the structure of an
organic compound and name the compound:
a. an alcohol b. an acid c. an amine d. an aldehyde
e. a ketone
f. an ester g. an ether h. an amide
6. (4 pts) Name four elements that are most often found in organic molecules,
especially biomolecules.
_____________
_______________
_______________ ______________
7. (6 pts) Write the Lewis structure and give the name of a saturated hydrocarbon.
Write the Lewis structure and give the name of an unsaturated hydrocarbon.
Write the Lewis structure and give the name of an aromatic hydrocarbon.
8. (6 pts) Draw the Lewis structure and identify the lone pairs (if any) in the molecule
methane, CH4.
Draw the Lewis structure and identify the lone pairs (if any) in the molecule methyl
amine, CH3NH2.
Draw the Lewis structure and identify the lone pairs (if any) in the molecule
methanol, CH3OH.
9. (5 pts)What three elements are found in a carbohydrate? What is the general
composition of a carbohydrate.
10. (4 pts) How does the formula for a monosaccharide, C6H12O6, differ from that of a
disaccharide. Why is there a difference?
11. (2 pts) Write the formula for a pentasaccharide.
12. (5 pts) Name the monomer(s) in each of the following:
Starch_____________________________________________
Protein_____________________________________________
Polyethylene________________________________________
Cellulose___________________________________________
Polypeptide__________________________________________
13. (2 pts) What products are formed when a protein undergoes hydrolysis.
14. (2 pts) What is the difference between a saturated and an unsaturated fat?
15. (4 pts) Describe the four levels of protein structure.
16. (2 pts) Alcohols, Esters, carboxylic acids, amides, ketones, aldehydes, ethers, and
amines represent the functional groups in organic chemistry. Among this list of
functional groups select the one which is an example of:
A protein _______________________
A fat ___________________________
17. (4 pts)What is the difference in the structure of starch and the structure of
cellulose? How does this difference impact on the difference in their properties?
18. (4 pts) What are the two ways in which DNA nucleotides differ from RNA
nucleotides?
19. (3 pts) What are the two classes of vitamins. What property distinguishes them
from each other?
20. (4 pts) Why is it often more healthful to eat vegetables that have been steamed
rather than boiled?
21. (4 pts) Which class of vitamins when taken in large enough quantities to be toxic
will our bodies be more tolerant of and why?
22. (6 pts) What are lipoproteins? Which classification of lipoproteins are more
desireable to have in the blood stream and why?
23. (9 pts) Identify and name all of the functional groups in the following compound.