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Midterm Exam 4
CHEM 2100
April 29, 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.
1. How many β carbons are found in the alkyl halide below?
1
, ###
A) 1
B) 2
C) 3
D) 4
E) none
2. Predict the major product for reaction shown.
A) I
B) II and IV
C) III
D) IV
E) II and V
3. In the addition reaction of HI to 2-methyl-2-butene, what is the first step?
A) attack of 2-methyl-2-butene initiated by an iodide ion
B) attack of 2-methyl-2-butene initiated by an iodine atom
C) isomerization of 2-iodo-2-methylbutene
D) formation of a carbocation at carbon two (C-2)
E) formation of carbocation at carbon three (C-3)
4. Predict all possible products from the following reactions
2
Midterm Exam 4
CHEM 2100
April 29, 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.
1. How many β carbons are found in the alkyl halide below?
1
, ###
A) 1
B) 2
C) 3
D) 4
E) none
2. Predict the major product for reaction shown.
A) I
B) II and IV
C) III
D) IV
E) II and V
3. In the addition reaction of HI to 2-methyl-2-butene, what is the first step?
A) attack of 2-methyl-2-butene initiated by an iodide ion
B) attack of 2-methyl-2-butene initiated by an iodine atom
C) isomerization of 2-iodo-2-methylbutene
D) formation of a carbocation at carbon two (C-2)
E) formation of carbocation at carbon three (C-3)
4. Predict all possible products from the following reactions
2
