Question 1

A triatomic molecule cannot be linear if the hybridization of the central atoms is __________.

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp2 or sp3
E)  sp2d or sp3d2

Question 2

The molecular geometry of the PHCl2 molecule is __________.

Accepted Answer

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

Question 3

Of the following, __________ appear(s) to gain mass in a magnetic field. B2 N2 O2

Accepted Answer

A)  O2 only
B)  N2 only
C)  B2 and N2
D)  N2 and O2
E)  B2 and O2

Question 4

The molecular geometry consists of __________. 
(a) a nonbonding pair of electrons
(b) a single bond
(c) a multiple bond

Accepted Answer

A)  a only
B)  b only
C)  c only
D)  a, b, and c
E)  b and c

Question 5

The O-S-O bond angle in SO2 is slightly less than __________.

Accepted Answer

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

Question 6

The electron-domain geometry of a carbon-centered compound is tetrahedral. The hybridization of the central carbon atom is __________.

Accepted Answer

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

Question 7

Of the following, only __________ has sp2 hybridization of the central atom.

Accepted Answer

A)  PH3
B)  CO32-
C)  ICl3
D)  l3-
E)  PF5

Question 8

The molecular geometry of the right-most carbon in the molecule below is __________.

Accepted Answer

A)  trigonal planar
B)  trigonal bipyramidal
C)  tetrahedral
D)  octahedral
E)  T-shaped

Question 9

Of the molecules below, only __________ is nonpolar.

Accepted Answer

A)  BF3
B)  NF3
C)  IF3
D)  PBr3
E)  BrCl3

Question 10

The more unpaired electrons in a species, the stronger is the force of magnetic attraction. This is called __________.

Accepted Answer

The answer of The more unpaired electrons in a species,...

Question 11

Based on molecular orbital theory, the bond order of the C-C bond in the C2 molecule is __________.

Accepted Answer

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

Question 12

In which of the molecules does the central atom utilize d orbitals to form hybrid orbitals?

Accepted Answer

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

Question 13

The electron domain and molecular geometry of BrO2- is __________.

Accepted Answer

A)  tetrahedral, trigonal planar
B)  trigonal planar, trigonal planar
C)  trigonal pyramidal, linear
D)  tetrahedral, bent
E)  trigonal pyramidal, seesaw

Question 14

Boron trifluoride has three bonding domains and its electron domain geometry is trigonal planar.

Accepted Answer

A) True 
 B)False

Question 15

For molecules of the general formula ABn, n can be greater than four __________.

Accepted Answer

A)  for any element A
B)  only when A is an element from the third period or below the third period
C)  only when A is boron or beryllium
D)  only when A is carbon
E)  only when A is Xe

Question 16

Valence bond theory does not address the issue of __________.

Accepted Answer

A)  excited states of molecules
B)  molecular shape
C)  covalent bonding
D)  hybridization
E)  multiple bonds

Question 17

Which of the following molecules or ions will exhibit delocalized bonding? SO2 SO3 SO32-

Accepted Answer

A)  SO2, SO3, and SO32-
B)  SO32- only
C)  SO2 and SO3
D)  SO3 and SO32-
E)  None of the above will exhibit delocalized bonding.

Question 18

In order to exhibit delocalized π bonding, a molecule must have __________.

Accepted Answer

A)  at least two π bonds
B)  at least two resonance structures
C)  at least three σ bonds
D)  at least four atoms
E)  trigonal planar electron domain geometry

Question 19

Of the following, the central atom is sp3d2 hybridized only in __________.

Accepted Answer

A)  PCl5
B)  XeF4
C)  PH3
D)  Br3-
E)  BeF2

Question 20

The molecular geometry of the CHF3 molecule is __________, and the molecule is __________.

Accepted Answer

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

Exam 9: Molecular Geometry and Bonding Theories

Of the molecules below, only __________ is nonpolar.

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Valence bond theory does not address the issue of __________.

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A triatomic molecule cannot be linear if the hybridization of the central atoms is __________.

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Of the following, the central atom is sp3d2 hybridized only in __________.

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The molecular geometry consists of __________. (a) a nonbonding pair of electrons (b) a single bond (c) a multiple bond

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In order to exhibit delocalized π bonding, a molecule must have __________.

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Based on molecular orbital theory, the bond order of the C-C bond in the C2 molecule is __________.

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The electron domain and molecular geometry of BrO2- is __________.

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The molecular geometry of the PHCl2 molecule is __________.

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The O-S-O bond angle in SO2 is slightly less than __________.

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The molecular geometry of the right-most carbon in the molecule below is __________.

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Boron trifluoride has three bonding domains and its electron domain geometry is trigonal planar.

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The molecular geometry of the CHF3 molecule is __________, and the molecule is __________.

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Which of the following molecules or ions will exhibit delocalized bonding? SO2 SO3 SO32-

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Of the following, only __________ has sp2 hybridization of the central atom.

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The more unpaired electrons in a species, the stronger is the force of magnetic attraction. This is called __________.

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The electron-domain geometry of a carbon-centered compound is tetrahedral. The hybridization of the central carbon atom is __________.

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In which of the molecules does the central atom utilize d orbitals to form hybrid orbitals?

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Of the following, __________ appear(s) to gain mass in a magnetic field. B2 N2 O2

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For molecules of the general formula ABn, n can be greater than four __________.

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Of the following, the central atom is sp³d² hybridized only in __________.

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Based on molecular orbital theory, the bond order of the C-C bond in the C₂ molecule is __________.

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The electron domain and molecular geometry of BrO₂^- is __________.

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The molecular geometry of the PHCl₂ molecule is __________.

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The O-S-O bond angle in SO₂ is slightly less than __________.

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The molecular geometry of the CHF₃ molecule is , and the molecule is .

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Which of the following molecules or ions will exhibit delocalized bonding? SO₂ SO₃ SO₃^2-

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Of the following, only __________ has sp² hybridization of the central atom.

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Of the following, __________ appear(s) to gain mass in a magnetic field. B₂ N₂ O₂

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For molecules of the general formula AB_n, n can be greater than four __________.

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