Answer Kea
Form A
Midterm Exam 1
CHEM 2100
February 11, 2026
Please carefully read these instructions
- Please fill out your last name, first name, and student number on the student answer
sheet.
+ There are 21 questions in total. You need to answer any 20 to get full credit.
« You can write on the question set; however, it will not be graded.
+ Calculators and cell phones are not allowed.
« The periodic table and electronegativity table have been included at the end of the
question set.
e There is ZERO TOLERANCE FOR CHEATING.
Question type: Multiple Choice
1. Determine the electron geometry around the indicated atom in each species.
B-0=5
5ig .e
oy H 103
2 H-GH=2
) \ ) /;-i ) [ A I
] [} m v
= Linear; II = tetrahedral; III = trigonal planar; IV = tetrahedral
B) I = Linear; II = tetrahedral; III = trigonal planar; IV = linear
C) I = Trigonal planar; II = linear; III = tetrahedral; IV = trigonal planar
D) I = Tetrahedral; II = trigonal planar; III = linear; IV = tetrahedral
E) I = Trigonal planar; II = trigonal planar; III = linear; IV = tetrahedral
2. What is the hybridization for each of the indicated atoms in the following compound?
/ I
N
||
H,C” “CH,
v T m
A) I =sp2; 11 = sp2; T = sp2.
B) 1= sp2; 11 = sp3; Il = sp3.
C)1=sp; Il = sp2; I = sp3.
, Form A
@I = sp2; 11 = sp2; [ = 5p3.
E)I=sp3; I = sp2; T = sp3
3. Which element is least likely to lose its valence electrons?
A) Oxygen
B) Chlorine
C) Sodium
Neon
E) Carbon
be described as
4. The bonding pattern of oxygen with a formal charge of 1— could
A) one lone pair of electrons and three single bonds
B) two lone pairs of electrons and two single bonds
@hree lone paits of electrons, and one single bond
D) one lone pair of electrons, one single, and one double bond
E) zero lone pairs, and two single and one double bond
ing skeletal structure?
5. Which of the following condensed formula represents the follow
M~
A) CH;CH;CHCH,CH2CH3
B) (CH3),CHCH2CH,CH(CHs)>
& (CH3)3CCH2CH(CH2CH3)2
@§ CH;3C(CH3),CH2CH,CH;3
E) CH3C(CH,CH3),CH2CH2CH3
other?
6. Which of the following pairs are resonance structures of each
M. V.
A1
B)1I
1I
Form A
Midterm Exam 1
CHEM 2100
February 11, 2026
Please carefully read these instructions
- Please fill out your last name, first name, and student number on the student answer
sheet.
+ There are 21 questions in total. You need to answer any 20 to get full credit.
« You can write on the question set; however, it will not be graded.
+ Calculators and cell phones are not allowed.
« The periodic table and electronegativity table have been included at the end of the
question set.
e There is ZERO TOLERANCE FOR CHEATING.
Question type: Multiple Choice
1. Determine the electron geometry around the indicated atom in each species.
B-0=5
5ig .e
oy H 103
2 H-GH=2
) \ ) /;-i ) [ A I
] [} m v
= Linear; II = tetrahedral; III = trigonal planar; IV = tetrahedral
B) I = Linear; II = tetrahedral; III = trigonal planar; IV = linear
C) I = Trigonal planar; II = linear; III = tetrahedral; IV = trigonal planar
D) I = Tetrahedral; II = trigonal planar; III = linear; IV = tetrahedral
E) I = Trigonal planar; II = trigonal planar; III = linear; IV = tetrahedral
2. What is the hybridization for each of the indicated atoms in the following compound?
/ I
N
||
H,C” “CH,
v T m
A) I =sp2; 11 = sp2; T = sp2.
B) 1= sp2; 11 = sp3; Il = sp3.
C)1=sp; Il = sp2; I = sp3.
, Form A
@I = sp2; 11 = sp2; [ = 5p3.
E)I=sp3; I = sp2; T = sp3
3. Which element is least likely to lose its valence electrons?
A) Oxygen
B) Chlorine
C) Sodium
Neon
E) Carbon
be described as
4. The bonding pattern of oxygen with a formal charge of 1— could
A) one lone pair of electrons and three single bonds
B) two lone pairs of electrons and two single bonds
@hree lone paits of electrons, and one single bond
D) one lone pair of electrons, one single, and one double bond
E) zero lone pairs, and two single and one double bond
ing skeletal structure?
5. Which of the following condensed formula represents the follow
M~
A) CH;CH;CHCH,CH2CH3
B) (CH3),CHCH2CH,CH(CHs)>
& (CH3)3CCH2CH(CH2CH3)2
@§ CH;3C(CH3),CH2CH,CH;3
E) CH3C(CH,CH3),CH2CH2CH3
other?
6. Which of the following pairs are resonance structures of each
M. V.
A1
B)1I
1I
