Question 1

According to Valence Bond Theory which orbital is left vacant in the molecule BF3?

Accepted Answer

A)  sp3
B)  sp2
C)  sp
D)  p
E)  sF) C) and D)
G) A) and B)

Question 2

In which of the following would the bonding be weakened with the subtraction of an electron to form a positive molecular ion?

Accepted Answer

A)  N2
B)  O2
C)  F2
D)  H2
E)  Cl2F) A) and C)
G) None of the above A

Question 3

What is the bond order of Cl2+

Accepted Answer

A)  0
B)  0.5
C)  1
D)  1.5
E)  2F) None of the above
G) A) and E)

Question 4

A sp2 hybridized terminal oxygen atom (bonded to one other atom only) with 2 lone pairs of electrons has what type of bonding?

Accepted Answer

A)  1 π\piπ  and 1  σ\sigmaσ  bonds
B)  2  π\piπ  and 1  σ\sigmaσ  bonds
C)  1  π\piπ  and 2  σ\sigmaσ  bonds
D)  0  π\piπ  and 2  σ\sigmaσ  bonds
E)  0  π\piπ  and 3  σ\sigmaσ  bonds F) B) and D)
G) B) and E) A

Question 5

The bond angle in Cl2O is expected to be approximately

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  145°
E)  180°F) D) and E)
G) All of the above

Question 6

The number of pi bonds in the oxalate ion (C2O42-) is

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and E)
G) A) and C)

Question 7

Consider the species Cl2+, Cl2, and Cl2-.Which of these species will be paramagnetic?

Accepted Answer

A)  only Cl2
B)  Cl2+ and Cl2
C)  Cl2 and Cl2-
D)  Cl2+ and Cl2-
E)  all three are paramagneticF) A) and E)
G) C) and D)

Question 8

A bonding molecular orbital is of lower energy (more stable)than the atomic orbitals from which it was formed.

Accepted Answer

A) True 
 B)False

Question 9

N,N-diethyl-m-tolumide (DEET) is the active ingredient in many mosquito repellents.What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below? 2 C) sp3 D) sp3d E) sp3d2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2F) All of the above
G) D) and E)

Question 10

Indicate the number of $\pi$-bonds in C2H4.

Accepted Answer

Question 11

A central atom with 5 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries? I.Trigonal bipyramidal
II.Seesaw
III.T-shaped
IV.Linear

Accepted Answer

A)  I, II, and III
B)  II, III, and IV
C)  I, III, and IV
D)  I, II, and IV
E)  I, II, III, and IVF) All of the above
G) B) and E)

Question 12

An sp2 hybridized central carbon atom with no lone pairs of electrons has what type of bonding?

Accepted Answer

A)  1  π\piπ  and 2   σ\sigmaσ  bonds
B)  1  π\piπ  and 3   σ\sigmaσ  bonds
C)  2  π\piπ  and 2   σ\sigmaσ  bonds
D)  3  π\piπ  and 2   σ\sigmaσ  bonds
E)  0  π\piπ  and 4   σ\sigmaσ  bonds F) None of the above
G) C) and E)

Question 13

A sp3d hybridized central atom has what angles between its hybrid orbitals?

Accepted Answer

A)  120° only
B)  120° and 109.5°
C)  109.5° only
D)  120° and 90°
E)  < 90°onlyF) A) and B)
G) A) and C)

Question 14

Consider the species N2-, N2, and N2+.Which of these species will be paramagnetic?

Accepted Answer

A)  N2 and N2-
B)  N2+ and N2
C)  N2+ and N2-
D)  only N2-
E)  none are paramagneticF) A) and E)
G) B) and E) C

Question 15

A sp2 hybridized central atom has what angles between its hybrid orbitals?

Accepted Answer

A)  145°
B)  120°
C)  109.5°
D)  90°
E)  < 90°F) D) and E)
G) B) and D)

Question 16

Give the number of lone pairs around the central atom and the molecular geometry of IF5.

Accepted Answer

A)  0 lone pairs, square pyramidal
B)  0 lone pairs, trigonal bipyramidal
C)  1 lone pair, octahedral
D)  1 lone pair, square pyramidal
E)  2 lone pairs, pentagonalF) All of the above
G) B) and D)

Question 17

Indicate the type of hybrid orbitals used by the central atom in CCl4.

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2F) A) and B)
G) D) and E)

Question 18

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever.What is the hybridization state of carbon indicated by the arrow in the structure of ibuprofen shown below? 2 C) sp3 D) sp3d E) sp3d2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2F) A) and D)
G) A) and E)

Question 19

Predict the molecular geometry and polarity of the SO2 molecule.

Accepted Answer

A)  linear, polar
B)  linear, nonpolar
C)  bent, polar
D)  bent, nonpolar
E)  None of the above.F) D) and E)
G) C) and E)

Question 20

In benzene (C6H6), what is the hybridization of each carbon atom?

Accepted Answer

Exam 10: Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

According to Valence Bond Theory which orbital is left vacant in the molecule BF3?

Correct AnswerverifiedShow Answer

In which of the following would the bonding be weakened with the subtraction of an electron to form a positive molecular ion?

Correct AnswerverifiedA

What is the bond order of Cl2+

Correct AnswerverifiedShow Answer

A sp2 hybridized terminal oxygen atom (bonded to one other atom only) with 2 lone pairs of electrons has what type of bonding?

Correct AnswerverifiedA

The bond angle in Cl2O is expected to be approximately

Correct AnswerverifiedShow Answer

The number of pi bonds in the oxalate ion (C2O42-) is

Correct AnswerverifiedShow Answer

Consider the species Cl2+, Cl2, and Cl2-.Which of these species will be paramagnetic?

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A bonding molecular orbital is of lower energy (more stable)than the atomic orbitals from which it was formed.

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N,N-diethyl-m-tolumide (DEET) is the active ingredient in many mosquito repellents.What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

Correct AnswerverifiedShow Answer

Indicate the number of π\piπ -bonds in C2H4.

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A central atom with 5 electron pairs (single bonds and/or lone pairs of electrons) could have which of the following molecular geometries? I.Trigonal bipyramidal II.Seesaw III.T-shaped IV.Linear

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An sp2 hybridized central carbon atom with no lone pairs of electrons has what type of bonding?

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A sp3d hybridized central atom has what angles between its hybrid orbitals?

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Consider the species N2-, N2, and N2+.Which of these species will be paramagnetic?

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A sp2 hybridized central atom has what angles between its hybrid orbitals?

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Give the number of lone pairs around the central atom and the molecular geometry of IF5.

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Indicate the type of hybrid orbitals used by the central atom in CCl4.

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Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever.What is the hybridization state of carbon indicated by the arrow in the structure of ibuprofen shown below?

Correct AnswerverifiedShow Answer

Predict the molecular geometry and polarity of the SO2 molecule.

Correct AnswerverifiedShow Answer

In benzene (C6H6), what is the hybridization of each carbon atom?

Correct AnswerverifiedShow Answer

According to Valence Bond Theory which orbital is left vacant in the molecule BF₃?

Correct Answer
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A

What is the bond order of Cl₂⁺

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A sp² hybridized terminal oxygen atom (bonded to one other atom only) with 2 lone pairs of electrons has what type of bonding?

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A

The bond angle in Cl₂O is expected to be approximately

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The number of pi bonds in the oxalate ion (C₂O₄^2-) is

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Consider the species Cl₂⁺, Cl₂, and Cl₂^-.Which of these species will be paramagnetic?

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Indicate the number of $\pi$ -bonds in C₂H₄.

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An sp² hybridized central carbon atom with no lone pairs of electrons has what type of bonding?

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A sp³d hybridized central atom has what angles between its hybrid orbitals?

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Consider the species N₂^-, N₂, and N₂⁺.Which of these species will be paramagnetic?

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C

A sp² hybridized central atom has what angles between its hybrid orbitals?

Correct Answer
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Give the number of lone pairs around the central atom and the molecular geometry of IF₅.

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Indicate the type of hybrid orbitals used by the central atom in CCl₄.

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Predict the molecular geometry and polarity of the SO₂ molecule.

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In benzene (C₆H₆), what is the hybridization of each carbon atom?

Correct Answer
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