CHEM 103 FINAL EXAM REVIEW
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
Question: Among the various ways a cyclohexane ring can twist, which spatial
arrangement is considered the most stable?
Answer: ✔️✔️ The chair conformation is the most stable. This specific shape
minimizes both steric strain and torsional strain, making it the lowest-energy
state for the molecule.
Question: What is the typical physical state of alkanes containing between 1
and 4 carbon atoms at room temperature?
Answer: ✔️✔️ These short-chain alkanes exist as gases. Examples include
methane, ethane, propane, and butane.
CHCl3 -ANSWER ✔️✔️IUPAC: Trichloromethane
CN: Chloroform
CCl4
IPUAC
CN -ANSWER ✔️✔️IUPAC: Tetrachloromethane
CN: Carbon tetrachloride
Halogenated Hydrocarbons Properties -ANSWER ✔️✔️not flammable, good
solvents, toxic/pollutants
Chlorofluorocarbons (CFCs)
- quick description
, -use
-what is used now -ANSWER ✔️✔️- "Freon". Nonflammable, odorless, and
noncorrosive
- used as heat transfer agents, cleaning solvents industries and propellants
- replaced with HFCs
H-C=C-H
H- -H -ANSWER ✔️✔️IUPAC: Ethylene
CN- ethene
H-C=-C-H
(triple bond) -ANSWER ✔️✔️IUPAC: Acetylene
CN: ethyne
CH3CH=CH2 -ANSWER ✔️✔️IUPAC: Propene
CN: Propylene
CH3C=CH2
I CH3
(methyl group) -ANSWER ✔️✔️IUPAC- 2-methylpropene
CN- isobutylene
addition of H2 to Alkene is called what -ANSWER ✔️✔️catalytic hydrogenation
addition of HX( HCl,HBr, or HI) to alkene -ANSWER ✔️✔️haloalkene
CH2=CH2 +HCl -ANSWER ✔️✔️CH2-CH2
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
Question: Among the various ways a cyclohexane ring can twist, which spatial
arrangement is considered the most stable?
Answer: ✔️✔️ The chair conformation is the most stable. This specific shape
minimizes both steric strain and torsional strain, making it the lowest-energy
state for the molecule.
Question: What is the typical physical state of alkanes containing between 1
and 4 carbon atoms at room temperature?
Answer: ✔️✔️ These short-chain alkanes exist as gases. Examples include
methane, ethane, propane, and butane.
CHCl3 -ANSWER ✔️✔️IUPAC: Trichloromethane
CN: Chloroform
CCl4
IPUAC
CN -ANSWER ✔️✔️IUPAC: Tetrachloromethane
CN: Carbon tetrachloride
Halogenated Hydrocarbons Properties -ANSWER ✔️✔️not flammable, good
solvents, toxic/pollutants
Chlorofluorocarbons (CFCs)
- quick description
, -use
-what is used now -ANSWER ✔️✔️- "Freon". Nonflammable, odorless, and
noncorrosive
- used as heat transfer agents, cleaning solvents industries and propellants
- replaced with HFCs
H-C=C-H
H- -H -ANSWER ✔️✔️IUPAC: Ethylene
CN- ethene
H-C=-C-H
(triple bond) -ANSWER ✔️✔️IUPAC: Acetylene
CN: ethyne
CH3CH=CH2 -ANSWER ✔️✔️IUPAC: Propene
CN: Propylene
CH3C=CH2
I CH3
(methyl group) -ANSWER ✔️✔️IUPAC- 2-methylpropene
CN- isobutylene
addition of H2 to Alkene is called what -ANSWER ✔️✔️catalytic hydrogenation
addition of HX( HCl,HBr, or HI) to alkene -ANSWER ✔️✔️haloalkene
CH2=CH2 +HCl -ANSWER ✔️✔️CH2-CH2
