Midterm Exam 3
CHEM 2100
April 1%, 2026
Total Points: 100
Please carefully read these instructions.
+ Please fill out your last name, first name, and student number on the student answer
sheet.
* There are a total of 22 questions. You need to answer any 20 to get full credit,
and answering all of them gives you extra credit.
* You can write on the question set; however, it will not be graded.
* The periodic table and pKa table have been included at the end.
« Calculators and cell phones are not allowed.
» There is ZERO TOLERANCE FOR CHEATING.
, Question Type: Multiple Choice
1. What is the relationship between the following two compounds?
CyMio O CyHio O
Sbl i
OH
@constitutional isomers
B) stereoisomers
C) identical
D) not isomers; different compounds entirely
E) none of the above
2. Which of the reactions below is most likely to proceed via an Sn2 mechanism?
acetone
G :NEC:® Na® >
water
YCI + CHz-OH —— >
1l "
“O @ DMSO
o8B+ H—Si Na —_—
DMSO
it >‘/C| + :NEC:e NP —
(A)1and 111
B) L, Il and IV
C)land IV
D) 1I
E) none
3. Which arrow(s) indicate the chiral center(s) in the compound shown?
HO
a O._OH
e\ \ b
HOG > \OH ‘
OH ‘¢
A)a
B)aandb
C)aandd
D)c,d,and e
@a, b,c,d,and e
CHEM 2100
April 1%, 2026
Total Points: 100
Please carefully read these instructions.
+ Please fill out your last name, first name, and student number on the student answer
sheet.
* There are a total of 22 questions. You need to answer any 20 to get full credit,
and answering all of them gives you extra credit.
* You can write on the question set; however, it will not be graded.
* The periodic table and pKa table have been included at the end.
« Calculators and cell phones are not allowed.
» There is ZERO TOLERANCE FOR CHEATING.
, Question Type: Multiple Choice
1. What is the relationship between the following two compounds?
CyMio O CyHio O
Sbl i
OH
@constitutional isomers
B) stereoisomers
C) identical
D) not isomers; different compounds entirely
E) none of the above
2. Which of the reactions below is most likely to proceed via an Sn2 mechanism?
acetone
G :NEC:® Na® >
water
YCI + CHz-OH —— >
1l "
“O @ DMSO
o8B+ H—Si Na —_—
DMSO
it >‘/C| + :NEC:e NP —
(A)1and 111
B) L, Il and IV
C)land IV
D) 1I
E) none
3. Which arrow(s) indicate the chiral center(s) in the compound shown?
HO
a O._OH
e\ \ b
HOG > \OH ‘
OH ‘¢
A)a
B)aandb
C)aandd
D)c,d,and e
@a, b,c,d,and e
