Test Bank For Organic Chemistry 8th Edition All Chapters

Test Bank For Organic Chemistry 8th Edition All Chapters

Chapter 1—Structure and Bonding
SHORT ANSWER
1. Give the ground-state electron configuration for carbon (atomic number 6).
ANS:
1s
2
2s
2
2px
1
2py
1
 or 1s
2
2s
2
2p
2
2. Give the ground-state electron configuration for fluorine (atomic number 9).
ANS:
1s
2
2s
2
2px
2
 2py
2
 2pz
1
 or 1s
2
2s
2
2p
5
3.Give the ground-state electron configuration for magnesium (atomic number 12).
ANS:
1s
2
2s
2
2p
6
3s
2
4. How many electrons does silicon have in its valence shell?
ANS:
four
Exhibit 1-1
Write valid Lewis (electron-dot) structures for each formula below. Show all electrons as dots and show
all non-bonding electrons.
5. C2Cl4 tetrachloroethylene
ANS:
6. CO2 carbon dioxide
ANS:
7. CH4O methanol
1
Structure and Bonding
ANS:
Exhibit 1-2
Consider the structure of urea, shown below, to answer the following question(s).
8. Refer to Exhibit 1-2. Fill in any non-bonding valence electrons that are missing from the line-bond
structure.
ANS:
9. Refer to Exhibit 1-2. The carbon atom in urea is:
sp3
 hybridized
sp2
 hybridized
sp hybridized
not hybridized
ANS:
b
10. Refer to Exhibit 1-2. The predicted NH2C=O bond angle in urea is:
109.5ï‚°
120ï‚°
180ï‚°
not predictable
ANS:
b
2
Chapter 1
Exhibit 1-3
Determine the hybridization for the indicated atoms in each structure below.
11. Refer to Exhibit 1-3. The hybridization of this oxygen atom (A) is ______.
ANS:
sp2
12. Refer to Exhibit 1-3. The hybridization of this oxygen atom (B) is ______.
ANS:
sp3
13. Refer to Exhibit 1-3. The hybridization of this carbon atom (C) is ______.
ANS:
sp3
14. Refer to Exhibit 1-3. The hybridization of this carbon atom (D) is ______.
ANS:
sp
15. The molecular formula C2H4O can be converted into three-line bond (Kekulé) structures that are
consistent with valence rules.
Which one of the Kekulé structures is not consistent with valence rules?
Explain why the structure you chose in part a is not consistent with valence rules.
ANS:
d
The carbon bonded to the oxygen atom in structure d is pentavalent; it has 10 valence
electrons. Carbon can only have eight valence electrons. In addition, the other carbon
has only six valence electrons when it would prefer to have eight.
3
Structure and Bonding
16. The original question was combined with #15. This placeholder question is here to maintain the
integrity of the numbering system between the printed copy and ExamView. Therefore, it has been
marked "do not use on test" in ExamView's question information dialog. As a result, this
placeholder question is automatically prevented from being chosen as a test question.
ANS:
Answer not provided.

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