CHEM 219 – Principles of Organic Chemistry
| Module 1–8 Exams & Final Exam | Portage
Learning (2026/2027) Actual Questions and
Verified Answers to Pass the Exam
KEY TOPICS COVERED
• Module 1: Structure & Bonding – Hybridization, resonance, acid-base chemistry,
functional groups, IUPAC nomenclature
• Module 2: Alkanes & Cycloalkanes – Nomenclature, conformational analysis,
stereochemistry, Newman projections
• Module 3: Stereochemistry – Chiral centers, enantiomers, diastereomers, optical
activity, R/S configuration
• Module 4: Alkyl Halides & Nucleophilic Substitution – SN1, SN2 mechanisms,
carbocation stability, leaving groups
• Module 5: Alkenes & Elimination Reactions – E1, E2 mechanisms, Zaitsev's rule,
alkene stability, addition reactions
• Module 6: Alkynes & Aromatic Compounds – Acidity, electrophilic aromatic
substitution, benzene derivatives, directing effects
• Module 7: Alcohols, Ethers & Epoxides – Synthesis, reactions, Grignard
reagents, protecting groups
• Module 8: Carbonyl Compounds – Aldehydes, ketones, carboxylic acids,
derivatives, nucleophilic acyl substitution
• Final Exam Review – Comprehensive synthesis, spectroscopy (IR, NMR, MS),
multi-step reactions
, MODULE 1: STRUCTURE & BONDING (Questions 1–40)
1. What is the hybridization of the carbon atom in methane (CH₄)?
A) sp
B) sp²
C) sp³
D) dsp²
Answer C: sp³
Rationale: Methane has four equivalent bonds with tetrahedral geometry; carbon
uses sp³ hybrid orbitals.
2. Which functional group is present in a carboxylic acid?
A) -OH
B) -CHO
C) -COOH
D) -COOR
Answer C: -COOH
Rationale: Carboxylic acids contain the carboxyl group (-COOH), consisting of a
carbonyl and a hydroxyl.
3. Which of the following is the strongest acid?
A) CH₃CH₂OH
,B) CH₃COOH
C) CF₃COOH
D) CH₃NH₂
Answer C: CF₃COOH
Rationale: Electron-withdrawing F atoms stabilize the conjugate base via
inductive effect; trifluoroacetic acid is much stronger than acetic acid.
4. What is the IUPAC name for CH₃CH₂CH₂CH₃?
A) Butane
B) Butane
C) Isobutane
D) Pentane
Answer B: Butane
Rationale: The four-carbon straight-chain alkane is butane.
5. Which bond is the most polar?
A) C-H
B) C-C
C) C-O
D) C-Br
Answer C: C-O
Rationale: Oxygen is highly electronegative, creating a significant dipole with
carbon.
, 6. A molecule that has a plane of symmetry is:
A) Chiral
B) Achiral
C) Optically active
D) Enantiomeric
Answer B: Achiral
Rationale: A plane of symmetry makes a molecule superimposable on its mirror
image (achiral).
7. Which of the following is a valid Lewis structure for CO₂?
A) O-C-O with single bonds
B) O=C=O with double bonds
C) O≡C-O
D) O-C≡O
Answer B: O=C=O with double bonds
Rationale: CO₂ has two double bonds to satisfy the octet rule for carbon.
8. The functional group in a ketone is:
A) -OH
B) C=O with two alkyl groups
C) -CHO
| Module 1–8 Exams & Final Exam | Portage
Learning (2026/2027) Actual Questions and
Verified Answers to Pass the Exam
KEY TOPICS COVERED
• Module 1: Structure & Bonding – Hybridization, resonance, acid-base chemistry,
functional groups, IUPAC nomenclature
• Module 2: Alkanes & Cycloalkanes – Nomenclature, conformational analysis,
stereochemistry, Newman projections
• Module 3: Stereochemistry – Chiral centers, enantiomers, diastereomers, optical
activity, R/S configuration
• Module 4: Alkyl Halides & Nucleophilic Substitution – SN1, SN2 mechanisms,
carbocation stability, leaving groups
• Module 5: Alkenes & Elimination Reactions – E1, E2 mechanisms, Zaitsev's rule,
alkene stability, addition reactions
• Module 6: Alkynes & Aromatic Compounds – Acidity, electrophilic aromatic
substitution, benzene derivatives, directing effects
• Module 7: Alcohols, Ethers & Epoxides – Synthesis, reactions, Grignard
reagents, protecting groups
• Module 8: Carbonyl Compounds – Aldehydes, ketones, carboxylic acids,
derivatives, nucleophilic acyl substitution
• Final Exam Review – Comprehensive synthesis, spectroscopy (IR, NMR, MS),
multi-step reactions
, MODULE 1: STRUCTURE & BONDING (Questions 1–40)
1. What is the hybridization of the carbon atom in methane (CH₄)?
A) sp
B) sp²
C) sp³
D) dsp²
Answer C: sp³
Rationale: Methane has four equivalent bonds with tetrahedral geometry; carbon
uses sp³ hybrid orbitals.
2. Which functional group is present in a carboxylic acid?
A) -OH
B) -CHO
C) -COOH
D) -COOR
Answer C: -COOH
Rationale: Carboxylic acids contain the carboxyl group (-COOH), consisting of a
carbonyl and a hydroxyl.
3. Which of the following is the strongest acid?
A) CH₃CH₂OH
,B) CH₃COOH
C) CF₃COOH
D) CH₃NH₂
Answer C: CF₃COOH
Rationale: Electron-withdrawing F atoms stabilize the conjugate base via
inductive effect; trifluoroacetic acid is much stronger than acetic acid.
4. What is the IUPAC name for CH₃CH₂CH₂CH₃?
A) Butane
B) Butane
C) Isobutane
D) Pentane
Answer B: Butane
Rationale: The four-carbon straight-chain alkane is butane.
5. Which bond is the most polar?
A) C-H
B) C-C
C) C-O
D) C-Br
Answer C: C-O
Rationale: Oxygen is highly electronegative, creating a significant dipole with
carbon.
, 6. A molecule that has a plane of symmetry is:
A) Chiral
B) Achiral
C) Optically active
D) Enantiomeric
Answer B: Achiral
Rationale: A plane of symmetry makes a molecule superimposable on its mirror
image (achiral).
7. Which of the following is a valid Lewis structure for CO₂?
A) O-C-O with single bonds
B) O=C=O with double bonds
C) O≡C-O
D) O-C≡O
Answer B: O=C=O with double bonds
Rationale: CO₂ has two double bonds to satisfy the octet rule for carbon.
8. The functional group in a ketone is:
A) -OH
B) C=O with two alkyl groups
C) -CHO
