,CHEM 104 Module 7 Exam General Chemistry II
w/Lab | Portage | 26/27|Q&A Actual (PDF)
1. Which of the following statements correctly defines a hydrocarbon?
A) A compound containing only carbon and hydrogen atoms.
B) A compound containing carbon, hydrogen, and oxygen atoms.
C) A compound containing carbon, hydrogen, and nitrogen atoms.
D) A compound containing only carbon atoms.
Correct Answer: A compound containing only carbon and hydrogen atoms.
Rationale: Hydrocarbons are organic compounds composed exclusively of carbon and hydrogen.
Option B describes carbohydrates or other oxygen-containing organics. Option C describes amines or
other nitrogen-containing compounds. Option D describes elemental carbon allotropes, not
hydrocarbons.
2. What is the IUPAC name for the straight-chain alkane with seven carbon atoms?
A) Hexane
B) Heptane
C) Octane
D) Nonane
,Correct Answer: Heptane
Rationale: The IUPAC root for seven carbons is hept-, with the alkane suffix -ane, giving heptane.
Hexane has six carbons, octane has eight, and nonane has nine. Options A, C, and D have incorrect
carbon counts.
3. Which of the following best describes a saturated hydrocarbon?
A) It contains at least one carbon-carbon double bond.
B) It contains only single carbon-carbon bonds.
C) It contains at least one carbon-carbon triple bond.
D) It contains a benzene ring.
Correct Answer: It contains only single carbon-carbon bonds.
Rationale: Saturated hydrocarbons (alkanes) have only single carbon-carbon bonds, with each carbon
bonded to the maximum number of hydrogen atoms. Option A describes alkenes, option C describes
alkynes, and option D describes aromatic compounds.
4. What is the correct IUPAC name for CH3CH2CH2CH3?
A) Butane
B) Propane
C) Pentane
, D) Ethane
Correct Answer: Butane
Rationale: The longest continuous carbon chain has four carbons, so the parent name is butane.
Propane has three carbons, pentane has five, and ethane has two. Options B, C, and D have incorrect
carbon counts.
5. Which of the following is the correct condensed structural formula for ethene?
A) CH3CH3
B) CH2=CH2
C) CH≡CH
D) CH3CH2OH
Correct Answer: CH2=CH2
Rationale: Ethene (ethylene) is an alkene with a carbon-carbon double bond, represented as
CH2=CH2. Option A is ethane, option C is ethyne, and option D is ethanol.
6. What is the IUPAC name for the compound CH3CH=CHCH3?
A) 1-Butene
B) 2-Butene
C) 1-Butyne
w/Lab | Portage | 26/27|Q&A Actual (PDF)
1. Which of the following statements correctly defines a hydrocarbon?
A) A compound containing only carbon and hydrogen atoms.
B) A compound containing carbon, hydrogen, and oxygen atoms.
C) A compound containing carbon, hydrogen, and nitrogen atoms.
D) A compound containing only carbon atoms.
Correct Answer: A compound containing only carbon and hydrogen atoms.
Rationale: Hydrocarbons are organic compounds composed exclusively of carbon and hydrogen.
Option B describes carbohydrates or other oxygen-containing organics. Option C describes amines or
other nitrogen-containing compounds. Option D describes elemental carbon allotropes, not
hydrocarbons.
2. What is the IUPAC name for the straight-chain alkane with seven carbon atoms?
A) Hexane
B) Heptane
C) Octane
D) Nonane
,Correct Answer: Heptane
Rationale: The IUPAC root for seven carbons is hept-, with the alkane suffix -ane, giving heptane.
Hexane has six carbons, octane has eight, and nonane has nine. Options A, C, and D have incorrect
carbon counts.
3. Which of the following best describes a saturated hydrocarbon?
A) It contains at least one carbon-carbon double bond.
B) It contains only single carbon-carbon bonds.
C) It contains at least one carbon-carbon triple bond.
D) It contains a benzene ring.
Correct Answer: It contains only single carbon-carbon bonds.
Rationale: Saturated hydrocarbons (alkanes) have only single carbon-carbon bonds, with each carbon
bonded to the maximum number of hydrogen atoms. Option A describes alkenes, option C describes
alkynes, and option D describes aromatic compounds.
4. What is the correct IUPAC name for CH3CH2CH2CH3?
A) Butane
B) Propane
C) Pentane
, D) Ethane
Correct Answer: Butane
Rationale: The longest continuous carbon chain has four carbons, so the parent name is butane.
Propane has three carbons, pentane has five, and ethane has two. Options B, C, and D have incorrect
carbon counts.
5. Which of the following is the correct condensed structural formula for ethene?
A) CH3CH3
B) CH2=CH2
C) CH≡CH
D) CH3CH2OH
Correct Answer: CH2=CH2
Rationale: Ethene (ethylene) is an alkene with a carbon-carbon double bond, represented as
CH2=CH2. Option A is ethane, option C is ethyne, and option D is ethanol.
6. What is the IUPAC name for the compound CH3CH=CHCH3?
A) 1-Butene
B) 2-Butene
C) 1-Butyne
