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Alkanes and Cycloalkanes: Practice Questions for Organic Chemistry, Exams of Organic Chemistry

State University College at Buffalo (SUNY)Organic Chemistry

practice test questions without answers

Typology: Exams

2022/2023

Uploaded on 11/12/2023

nicole-haines-1
nicole-haines-1 🇺🇸

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Chapter 2 -- Alkanes and Cycloalkanes - Practice Questions
1. What is the molecular formula of an alkane that has fourteen carbon atoms?
A)
C14H28
B)
C14H30
C)
C14H32
D)
C14H34
E)
C14H26
2. What is the molecular formula of a cycloalkane that has six carbon atoms?
A)
C6H12
B)
C6H14
C)
C6H16
D)
C6H10
E)
C6H7
3. What is the name of the alkane that has three carbon atoms?
A)
Methane
B)
Ethane
C)
Propane
D)
Butane
E)
isobutane
4. The correct IUPAC name for the following molecule is:
A)
6-ethyl-3,4,-dimethylheptane
B)
2-ethyl-4,5-dimethylheptane
C)
3,4,6-trimethyloctane
D)
3,5,6-trimethyloctane
E)
none of these
5. What is the common name for the following molecule?
A)
isobutyl bromide
B)
tert-butyl bromide
C)
butyl bromide
D)
sec-butyl bromide
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Chapter 2 -- Alkanes and Cycloalkanes - Practice Questions

  1. What is the molecular formula of an alkane that has fourteen carbon atoms? A) (^) C 14 H 28 B) (^) C 14 H 30 C) (^) C 14 H 32 D) (^) C 14 H 34 E) (^) C 14 H 26
  2. What is the molecular formula of a cycloalkane that has six carbon atoms? A) (^) C 6 H 12 B) (^) C 6 H 14 C) (^) C 6 H 16 D) (^) C 6 H 10 E) (^) C 6 H 7
  3. What is the name of the alkane that has three carbon atoms? A) (^) Methane B) (^) Ethane C) (^) Propane D) (^) Butane E) (^) isobutane
  4. The correct IUPAC name for the following molecule is: A) (^6) - ethyl-3,4,-dimethylheptane B) (^2) - ethyl-4,5-dimethylheptane C) (^) 3,4,6-trimethyloctane D) (^) 3,5,6-trimethyloctane E) (^) none of these
  5. What is the common name for the following molecule? A) (^) isobutyl bromide B) (^) tert - butyl bromide C) (^) butyl bromide D) (^) sec - butyl bromide

E) (^) bromo- sec - butane

  1. The name of the alkyl group that contains three carbons is: A) (^) Methyl B) (^) Ethyl C) (^) Propyl D) (^) isopropyl E) (^) none of these
  2. Which of the following structures is 2-methylpentane? A) B) C) D) E)
  3. The name of the alkyl group below is: A) (^) Ethyl B) (^) Propyl C) (^) Isopropyl D) (^) Butyl E) (^) Isobutyl
  4. What is the IUPAC name for the following compound? A) (^) isohexyl bromide

B) C) D) E)

  1. What is the correct name for the following cycloalkane? A) (^) bromoethylcyclohexane B) (^) trans - 1 - ethyl- 3 - bromocyclohexane C) (^) cis - 3 - bromo- 1 - ethylhexane D) (^1) - bromo- 3 - ethylcyclohexane E) (^) cis - 1 - bromo- 3 - ethylcyclohexane
  2. The correct IUPAC name for (CH 3 ) 2 CHCH(CH 3 )(CH 2 ) 3 CH(CH 3 ) 2 is A) (^) diisopropylpentane. B) (^) 1,1,2,6,6-pentamethylhexane. C) (^) 2,5-diisopropylpentane. D) (^) 2,3,7-trimethyloctane. E) (^) 1,4-diisopropylpentane.
  1. The correct IUPAC name for is: A) (^) 1,3,3-trimethylcyclobutane. B) (^) cis - 1,3,3-trimethylcyclobutane. C) (^) trans - 1,3,3-trimethylcyclobutane. D) (^) 1,1,3-trimethylcyclobutane. E) (^) 2,2,4-trimethylcyclobutane.
  2. The structural formula for 2,2,3-trimethylhexane is A) B) C) D) E)
  3. Which of the following would exhibit hydrogen bonding? A) (^) CH 3 Cl B) (^) CH 3 OH C) (^) CH 4 D) (^) CH 2 Cl 2 E) (^) CH 3 CH 3
  4. Which of the following alkanes would have the highest boiling point? A) (^) Pentane B) (^2) - methylbutane

B) C) D) E)

  1. The least stable conformation of butane is given by which of the following Newman projections? A) B) C)

D) E)

  1. The preferred conformation of cis - 3 - tert - butyl- 1 - methylcyclohexane is the one in which: A) (^) the t - butyl group is axial and the methyl group is equatorial B) (^) both groups are axial C) (^) both groups are equatorial D) (^) the methyl group is axial and the t - butyl group is equatorial E) (^) molecule exists in a boat conformation
  2. The bond angle of a normal, tetrahedral, sp^3 hybridized carbon is 109.5°. What is the C–C–C bond angle of cyclobutane? A) (^) 60° B) (^) 90° C) 109.5° D) (^) 120° E) (^) 180°
  3. For the most stable conformation of cis - 1,3-dimethylcyclohexane: A) (^) both methyls will occupy the axial position B) (^) both methyls will occupy the equatorial position C) (^) one methyl will occupy the axial position and the other an equatorial position D) (^) more than one answer is correct
  4. Which of the following pairs are examples of conformational isomerism? A) (^) chair and boat forms of cyclohexane B) (^1) - iodopropane and 2-iodopropane C) (^) sec - butyl chloride and butyl iodide D) (^) cis and trans - 1,2-dimethylcyclohexane E) (^) all of these
  5. Consider this chair conformation:

A) (^) structural isomers. B) identical. C) (^) cis-trans isomers. D) (^) conformers. E) (^) constitutional isomers.

  1. The compounds represented by the structures below are: A) (^) structural isomers. B) (^) different compounds. C) (^) cis-trans isomers. D) (^) conformers. E) (^) constitutional isomers.
  2. The compounds represented by the structures below are: A) (^) structural isomers. B) (^) different compounds. C) (^) cis-trans isomers. D) (^) conformers. E) (^) constitutional isomers.
  3. The compounds represented by the structures below are:

A) (^) constitutional isomers. B) (^) identical. C) (^) cis-trans isomers. D) (^) conformers. E) (^) different compounds (not isomers)..

  1. In the chlorination of methane, the propagation steps involve forming: A) (^) H radicals B) (^) methyl radicals C) (^) chlorine radicals D) (^) a, b, and c E) (^) b and c
  2. How many monobromo products can be obtained from the bromination of cyclopentane? A) (^1) B) (^2) C) (^3) D) (^4) E) (^5)
  3. How many isomeric dichloro products can be obtained from the chlorination of cyclopropane? A) (^1) B) (^2) C) (^3) D) (^4) E) (^5)
  4. The number of possible monobromination products, including cis-trans isomers, of methylcyclopentane is A) (^2) B) (^3) C) (^4) D) (^5) E) (^6)
  5. The number of possible dibromination products of 2-methylpropane is A) (^2) B) (^3) C) (^4) D) (^5) E) 6
  6. The number of possible dichlorination products of propane is A) (^2) B) (^3) C) 4 D) (^5) E) (^6)