Chapter 3 - Alkanes and Cycloalkanes_ Conformations and cis-trans Stereoisomers (Test Bank)

1.Identify the conformation of butane shown below.




A. anti
B. gauche
C. skewed
D. eclipsed

Bloom's Level: 2. Understand
Chapter: 03
Difficulty: Easy
Gradable: automatic
Section: 03.02
Subtopic: Conformations of acyclic alkanes
Topic: Alkanes (Acyclic and Cyclic)




3-1
Copyright © 2016 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
McGraw-Hill Education.

,2.What is the IUPAC name of the compound shown in the following Newman projection?




A. 1,1,2,2-tetramethylethane
B. 2,2,3,3-tetramethylbutane
C. 1,2-dimethylethane
D. 2,3-dimethylbutane

Bloom's Level: 3. Apply
Chapter: 03
Difficulty: Medium
Gradable: automatic
Section: 03.02
Subtopic: Conformations of acyclic alkanes
Subtopic: IUPAC Nomenclature of acyclic alkanes
Topic: Alkanes (Acyclic and Cyclic)




3-2
Copyright © 2016 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
McGraw-Hill Education.

,3.What is the IUPAC name of the compound shown below?




A. 1,2,3-trimethylbutane
B.2,3-dimethylpentane
C.2,3,4-trimethylpentane
D. 2-isopropylbutane

Bloom's Level: 3. Apply
Chapter: 03
Difficulty: Medium
Gradable: automatic
Section: 03.02
Subtopic: Conformations of acyclic alkanes
Subtopic: IUPAC Nomenclature of acyclic alkanes
Topic: Alkanes (Acyclic and Cyclic)




3-3
Copyright © 2016 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
McGraw-Hill Education.

, 4.What is the dihedral (torsion) angle between the two bromine atoms in the following
sawhorse drawing?




o
A. 0
o
B. 30
o
C. 60
o
D. 90
Bloom's Level: 2. Understand
Chapter: 03
Difficulty: Medium
Gradable: automatic
Section: 03.01
Subtopic: Conformations of acyclic alkanes
Subtopic: Projections of acyclic alkanes
Topic: Alkanes (Acyclic and Cyclic)


5. At room temperature, the various conformations of butane

A.do not interconvert; only the anti form is present.
B. do not interconvert, but all conformations are present.
C. interconvert very slowly.
D. interconvert very rapidly.

Accessibility: Keyboard Navigation
Bloom's Level: 1. Remember
Chapter: 03
Difficulty: Easy
Gradable: automatic
Section: 03.02
Subtopic: Conformations of acyclic alkanes
Topic: Alkanes (Acyclic and Cyclic)




3-4
Copyright © 2016 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
McGraw-Hill Education.