CHEM 341: Organic Chemistry I – Quiz 1 – Answer Key
[Blue]
1) How many constitutional isomers of C3H6Cl2 are possible?
A) three B) four C) five D) six
Ans: B
2) What is the formal charge on the nitrogen atom in the structure below?
A) -1
B) 0
C) +1
D) +2
Ans: C
3) Which of the following molecules would you expect to have a dipole moment?
I. CH2Cl2 II. CH3Cl III. CCl4
A) only I
Ans: C
B) only II
C) I and II
D) I, II, and III
4) What are the formal charges of boron and nitrogen, respectively, in the following structure?
A)
B)
C)
D)
-1 and +1
-1 and 0
0 and +1
0 and 0
Ans: A
5) Which one of the following has the largest acid equilibrium constant, Ka?
A) CCl3CO2H B) CH2ClCO2H C) CH3CO2H D) CHCl2CO2H
Ans: A
6) Which of the following is not identical to the others?
A
B
C
D
Ans: D
7) What structure would result from these electron movement arrows?
?
O
+
O
O
A
B
OH
O
C
D
Ans: C
Prof. Sivaguru Jayaraman
page 1 of 2
Chem 341: Fall 2010
CHEM 341: Organic Chemistry I – Quiz 1 – Answer Key
[Blue]
8) Which of the following is not a resonance structure of
O
O
O
O
(A)
C
O
O
O
O
(B)
C
O
(C)
O
(D)
Ans D
9) The molecule with the largest dipole moment is?
F
F
F
F
F
F
(A)
(B)
F
(C)
F
(D)
Ans D
10) Which of the following reactions shows the correct use of "curly arrows"?
+
(A)
O
+
O
+
Cl
+
Cl
O
Cl
+
(C)
Cl
O
Cl
(B)
+
O
O
Cl
+
(C)
+
O
Cl
O
Cl
Ans B
11) Bonus question
Which one of the following is the strongest base? (Note: The conjugate acid of the base is the
week one, so look at which one is the week conjugate acid)
NH2
OH
F
(A)
(B)
Ans: A
(C)
(D)
H3C:
Prof. Sivaguru Jayaraman
page 2 of 2
Chem 341: Fall 2010