Question 1

For a molecule with the formula AB2,the molecular shape is ________.

Accepted Answer

A)  linear or bent
B)  linear or trigonal planar
C)  linear or T-shaped
D)  T-shaped
E)  trigonal planar

Question 2

The bond angle marked a in the following molecule is about ________.

Accepted Answer

A)  109.5
B)  60
C)  180
D)  120
E)  90

Question 3

The molecular geometry of the PF3 molecule is ________,and this molecule is ________.

Accepted Answer

A)  trigonal planar, polar
B)  trigonal planar, nonpolar
C)  trigonal pyramidal, polar
D)  trigonal pyramidal, nonpolar
E)  tetrahedral, unipolar

Question 4

The carbon-hydrogen σ bond in ethylene,H2C 2C   CH2,results from the overlap of ________. A) sp2-hybrid and s-atomic orbitals B) sp hybrid orbitals C) sp3 hybrid orbitals D) s-hybrid and sp2-atomic orbitals E) s atomic orbitals" class="answers-bank-image d-inline" rel="preload" > CH2,results from the overlap of ________.

Accepted Answer

A)  sp2-hybrid and s-atomic orbitals
B)  sp hybrid orbitals
C)  sp3 hybrid orbitals
D)  s-hybrid and sp2-atomic orbitals
E)  s atomic orbitals

Question 5

The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn are ________.

Accepted Answer

A)  never the same
B)  always the same
C)  sometimes the same
D)  not related
E)  mirror images of one another

Question 6

A typical triple bond consists of ________ sigma bond(s) and ________ pi bond(s) .

Accepted Answer

A)  1, 2
B)  2, 2
C)  1, 3
D)  0, 3
E)  1, 4

Question 7

The hybrid orbital set used by the central atom in SO3 is ________.

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2

Question 8

The F-N-F bond angle in the NF3 molecule is slightly less than ________.

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°
E)  60°

Question 9

A ________ compound would display unpaired electrons in the molecular orbital diagram.

Accepted Answer

The answer of A ________ compound would display unpaired electrons...

Question 10

Possible shapes of AB3 molecules are linear,trigonal planar,and T-shaped.

Accepted Answer

A) True 
 B)False

Question 11

How many hybridized s atomic orbital(s) are found in an sp2-hybridized carbon atom?

Accepted Answer

A)  0
B)  3
C)  2
D)  1
E)  4

Question 12

The molecular geometry of the BCl3 molecule is ________,and this molecule is ________.

Accepted Answer

A)  trigonal pyramidal, polar
B)  trigonal pyramidal, nonpolar
C)  trigonal planar, polar
D)  trigonal planar, nonpolar
E)  trigonal bipyramidal, polar

Question 13

The quantitative amount of charge separation in a diatomic molecule contributes to the dipole moment of that molecule.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following molecules would be expected to be attracted to a magnetic field?
F2 N2 O2

Accepted Answer

A)  F2 and N2
B)  F2 and O2
C)  O2 only
D)  N2 only
E)  N2 and O2

Question 15

The central atom in a certain molecule has 4 nonbonded electron pairs and 2 bonded electron pairs in its valence shell.The molecular geometry of this molecule is ________.

Accepted Answer

A)  seesaw
B)  square planar
C)  linear
D)  trigonal bipyramidal
E)  T-shaped

Question 16

In which of the molecules is the central atom sp2 hybridized?

Accepted Answer

A)  (i) only
B)  (i) and (ii) 
C)  (iii) and (iv) 
D)  (iii) only
E)  (iv) and (v)

Question 17

The molecular geometry of the CS2 molecule is ________.

Accepted Answer

A)  linear
B)  bent
C)  tetrahedral
D)  trigonal planar
E)  T-shaped

Question 18

According to MO theory,overlap of two s atomic orbitals produces ________.

Accepted Answer

A)  one bonding molecular orbital and one hybrid orbital
B)  two bonding molecular orbitals
C)  two bonding molecular orbitals and two antibonding molecular orbitals
D)  two bonding molecular orbitals and one antibonding molecular orbital
E)  one bonding molecular orbital and one antibonding molecular orbital

Question 19

The electron-domain geometry of a sulfur-centered compound is trigonal bipyramidal.The hybridization of the central sulfur atom is ________.

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2

Question 20

The hybridizations of nitrogen in NF3 and NH3 are ________ and ________,respectively.

Accepted Answer

A)  sp2, sp2
B)  sp, sp3
C)  sp3, sp
D)  sp3, sp3
E)  sp2, sp3

Exam 9: Molecular Geometry and Bonding Theories

The bond angle marked a in the following molecule is about ________.

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Possible shapes of AB3 molecules are linear,trigonal planar,and T-shaped.

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The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn are ________.

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The molecular geometry of the BCl3 molecule is ________,and this molecule is ________.

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The hybrid orbital set used by the central atom in SO3 is ________.

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The quantitative amount of charge separation in a diatomic molecule contributes to the dipole moment of that molecule.

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The electron-domain geometry of a sulfur-centered compound is trigonal bipyramidal.The hybridization of the central sulfur atom is ________.

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The F-N-F bond angle in the NF3 molecule is slightly less than ________.

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A ________ compound would display unpaired electrons in the molecular orbital diagram.

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The hybridizations of nitrogen in NF3 and NH3 are ________ and ________,respectively.

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How many hybridized s atomic orbital(s) are found in an sp2-hybridized carbon atom?

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The central atom in a certain molecule has 4 nonbonded electron pairs and 2 bonded electron pairs in its valence shell.The molecular geometry of this molecule is ________.

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Which of the following molecules would be expected to be attracted to a magnetic field? F2 N2 O2

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According to MO theory,overlap of two s atomic orbitals produces ________.

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For a molecule with the formula AB2,the molecular shape is ________.

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In which of the molecules is the central atom sp2 hybridized?

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The carbon-hydrogen σ bond in ethylene,H2C CH2,results from the overlap of ________.

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The molecular geometry of the PF3 molecule is ________,and this molecule is ________.

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The molecular geometry of the CS2 molecule is ________.

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A typical triple bond consists of ________ sigma bond(s) and ________ pi bond(s) .

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Possible shapes of AB₃ molecules are linear,trigonal planar,and T-shaped.

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The electron-domain geometry and the molecular geometry of a molecule of the general formula AB_n are ________.

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The molecular geometry of the BCl₃ molecule is ,and this molecule is .

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The hybrid orbital set used by the central atom in SO₃ is ________.

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The F-N-F bond angle in the NF₃molecule is slightly less than ________.

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The hybridizations of nitrogen in NF₃ and NH₃are and ,respectively.

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How many hybridized s atomic orbital(s) are found in an sp²-hybridized carbon atom?

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Which of the following molecules would be expected to be attracted to a magnetic field? F₂ N₂ O₂

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For a molecule with the formula AB₂,the molecular shape is ________.

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In which of the molecules is the central atom sp² hybridized?

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The carbon-hydrogen σ bond in ethylene,H₂C CH₂,results from the overlap of ________.

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The molecular geometry of the PF₃ molecule is ,and this molecule is .

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The molecular geometry of the CS₂ molecule is ________.

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A typical triple bond consists of sigma bond(s) and pi bond(s) .

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