Question 1

The F-B-F bond angle in the BF2- ion is approximately ________.

Accepted Answer

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

Question 2

There is/are ________ π bond(s) in the molecule below.

Accepted Answer

A)  0
B)  1
C)  2
D)  4
E)  16

Question 3

The molecular geometry of the PHCl2 molecule is ________.

Accepted Answer

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

Question 4

The molecular geometry of the PF4+ ion is ________.

Accepted Answer

A)  octahedral
B)  tetrahedral
C)  trigonal pyramidal
D)  trigonal planar
E)  trigonal bipyramidal

Question 5

What are the hybrid orbitals used for bonding by Xe in a XeCl4 molecule?

Accepted Answer

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

Question 6

According to molecular orbital theory,how many unpaired electrons are in a peroxide ion,O22-?

Accepted Answer

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

Question 7

The more effectively two atomic orbitals overlap,________.

Accepted Answer

A)  the more bonding MOs will be produced by the combination
B)  the higher will be the energy of the resulting bonding MO and the lower will be the energy of the resulting antibonding MO
C)  the higher will be the energies of both bonding and antibonding MOs that result
D)  the fewer antibonding MOs will be produced by the combination
E)  the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO

Question 8

For molecules with only one central atom,how many lone pairs on the central atom guarantees molecular polarity?

Accepted Answer

A)  1
B)  2
C)  1 or 2
D)  3
E)  1 or 3

Question 9

The highest energy occupied molecular orbital in the F-F bond of the F2 molecule is ________.

Accepted Answer

A)  π*2s
B)  π2s
C)  σ*1p
D)  π*2p
E)  π2p

Question 10

The H-C-H bond angle in the CH4 ion is approximately ________.

Accepted Answer

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

Question 11

What is the hybridization of the I atom in a IF5 molecule?

Accepted Answer

A)  sp2d2
B)  sp3d
C)  sp3
D)  sp3d2
E)  sp2

Question 12

The hybridization of carbon in the H-C 2 B) sp C) s2p D) s3p E) sp3" class="answers-bank-image d-inline" rel="preload" > C-H molecule is ________.

Accepted Answer

A)  sp2
B)  sp
C)  s2p
D)  s3p
E)  sp3

Question 13

The electron-domain geometry of a boron-centered compound BH3 is trigonal planar.The hybridization of the central boron atom is ________.

Accepted Answer

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

Question 14

In a C=C bond,the σ bond results from overlap of ________ orbitals and the π bond(s) result from overlap of ________ orbitals.

Accepted Answer

A)  sp2-hybrid, p-atomic
B)  sp2-atomic, p-hybrid
C)  sp3-hybrid, p-atomic
D)  sp-hybrid, p-atomic
E)  σ-atomic, π-hybrid

Question 15

The Lewis structure of carbon monoxide is given below.The hybridizations of the carbon and oxygen atoms in carbon monoxide are ________ and ________,respectively. - :C ≡ O: +

Accepted Answer

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

Question 16

Using the VSEPR model,the molecular geometry of the central atom in KrF2 is ________.

Accepted Answer

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

Question 17

Which of the molecules has a see-saw shape?

Accepted Answer

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

Question 18

According to valence bond theory,which orbitals overlap in the formation of the bond in  ?

Accepted Answer

A)  3s
B)  3p
C)  4s
D)  4p
E)  3d

Question 19

According to valence bond theory,which orbitals overlap in the formation of the bond in HCl?

Accepted Answer

A)  1s on H and 2p on Cl
B)  2s on H and 3p on Cl
C)  1s on H and 3s on Cl
D)  1s on H and 3p on Cl
E)  1s on H and 4p on Cl

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 9: Molecular Geometry and Bonding Theories

The electron-domain geometry of a boron-centered compound BH3 is trigonal planar.The hybridization of the central boron atom is ________.

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What are the hybrid orbitals used for bonding by Xe in a XeCl4 molecule?

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The F-B-F bond angle in the BF2- ion is approximately ________.

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The molecular geometry of the PF4+ ion is ________.

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The highest energy occupied molecular orbital in the F-F bond of the F2 molecule is ________.

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The H-C-H bond angle in the CH4 ion is approximately ________.

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The more effectively two atomic orbitals overlap,________.

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For molecules with only one central atom,how many lone pairs on the central atom guarantees molecular polarity?

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According to valence bond theory,which orbitals overlap in the formation of the bond in HCl?

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According to molecular orbital theory,how many unpaired electrons are in a peroxide ion,O22-?

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In a C=C bond,the σ bond results from overlap of ________ orbitals and the π bond(s) result from overlap of ________ orbitals.

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The molecular geometry of the PHCl2 molecule is ________.

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

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The Lewis structure of carbon monoxide is given below.The hybridizations of the carbon and oxygen atoms in carbon monoxide are ________ and ________,respectively. - :C ≡ O: +

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Using the VSEPR model,the molecular geometry of the central atom in KrF2 is ________.

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The hybridization of carbon in the H-C C-H molecule is ________.

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What is the hybridization of the I atom in a IF5 molecule?

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According to valence bond theory,which orbitals overlap in the formation of the bond in ?

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Which of the molecules has a see-saw shape?

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There is/are ________ π bond(s) in the molecule below.

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The electron-domain geometry of a boron-centered compound BH₃ is trigonal planar.The hybridization of the central boron atom is ________.

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What are the hybrid orbitals used for bonding by Xe in a XeCl₄ molecule?

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The F-B-F bond angle in the BF₂^- ion is approximately ________.

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The molecular geometry of the PF₄⁺ ion is ________.

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The highest energy occupied molecular orbital in the F-F bond of the F₂ molecule is ________.

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The H-C-H bond angle in the CH₄ ion is approximately ________.

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According to molecular orbital theory,how many unpaired electrons are in a peroxide ion,O₂^2-?

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In a C=C bond,the σ bond results from overlap of orbitals and the π bond(s) result from overlap of orbitals.

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The molecular geometry of the PHCl₂ molecule is ________.

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The Lewis structure of carbon monoxide is given below.The hybridizations of the carbon and oxygen atoms in carbon monoxide are and ,respectively. ^-^:C ≡ O: ⁺

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Using the VSEPR model,the molecular geometry of the central atom in KrF₂ is ________.

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What is the hybridization of the I atom in a IF₅ molecule?

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