Question 1

A molecule with polar bonds must be a polar molecule in all cases.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following molecules has polar bonds but is a nonpolar molecule

Accepted Answer

A)   PCl3
B)   NCl3
C)   BF3
D)   HF
E)   OCl2

Question 3

Give the number of lone pairs around the central atom and the molecular geometry of XeF2.

Accepted Answer

A)   0 lone pairs, linear
B)   1 lone pair, bent
C)   2 lone pairs, bent
D)   3 lone pairs, bent
E)   3 lone pairs, linear

Question 4

A species with a bond order of 1/2 may be stable.

Accepted Answer

A) True 
 B)False

Question 5

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

Question 6

The F -Cl -F bond angles in ClF3 are expected to be approximately

Accepted Answer

A)   90 ∘\circ∘  only.
B)   109.5 ∘\circ∘  only.
C)   120 ∘\circ∘  only.
D)   180 ∘\circ∘ only.
E)   90 ∘\circ∘  and 180 ∘\circ∘ .

Question 7

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)   sp3d2

Question 8

Predict the geometry and polarity of the CS2 molecule.

Accepted Answer

A)   linear, polar
B)   linear, nonpolar
C)   tetrahedral, nonpolar
D)   bent, nonpolar
E)   bent, polar

Question 9

Which bond angles are present in a molecule with an octahedral geometry

Accepted Answer

A)   45 ∘\circ∘ 
B)   90 ∘\circ∘ 
C)   120 ∘\circ∘ 
D)   depends on the type of atoms in the octehedron
E)  None of the above

Question 10

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

Accepted Answer

A)   120 ∘\circ∘  only
B)   120 ∘\circ∘ and 109.5 ∘\circ∘ 
C)   109.5 ∘\circ∘  only
D)   120 ∘\circ∘  and 90 ∘\circ∘ 
E)    ∘\circ∘  only

Question 11

CO2 is nonpolar, but OCS is polar.

Accepted Answer

A) True 
 B)False

Question 12

Consider the species O2-, O2, and O2+. Which of these species will be paramagnetic

Accepted Answer

A)   O2 and O2-
B)   O2+ and O2
C)   O2+ and O2-
D)   only O2
E)   all three are paramagnetic

Question 13

Give the number of lone pairs around the central atom and the molecular geometry of CBr4.

Accepted Answer

A)   0 lone pairs, square planar
B)   0 lone pairs, tetahedral
C)   1 lone pair, square pyramidal
D)   1 lone pair, trigonal bipyramidal
E)   2 lone pairs, square planar

Question 14

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)   sp3d2

Question 15

An sp 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

Question 16

Which of the following substances is/are bent
(i)  H2S (ii) . CO2 (iii)  ClNO (iv)  NH2- (v)  O3

Accepted Answer

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

Question 17

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

Question 18

Predict the geometry around the central atom in SO42-.

Accepted Answer

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

Question 19

Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH3, PH3, AsH3.

Accepted Answer

A)   AsH3 3 3
B)   PH3 3 3
C)   NH3 3 3
D)   AsH3 3 3
E)  None of the above

Question 20

Which of the following species has the largest dipole moment (i.e., is the most polar)

Accepted Answer

A)   H2
B)   H2O
C)   H2S
D)   H2Se
E)   CH4

Exam 10: Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

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

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Which of the following molecules has polar bonds but is a nonpolar molecule

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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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Give the number of lone pairs around the central atom and the molecular geometry of CBr4.

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A species with a bond order of 1/2 may be stable.

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Predict the geometry and polarity of the CS2 molecule.

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Predict the molecular geometry and polarity of the SO2 molecule.

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Which of the following substances is/are bent (i) H2S (ii) . CO2 (iii) ClNO (iv) NH2- (v) O3

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Give the number of lone pairs around the central atom and the molecular geometry of XeF2.

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Predict the geometry around the central atom in SO42-.

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The F -Cl -F bond angles in ClF3 are expected to be approximately

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CO2 is nonpolar, but OCS is polar.

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Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH3, PH3, AsH3.

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Which bond angles are present in a molecule with an octahedral geometry

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

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Which of the following species has the largest dipole moment (i.e., is the most polar)

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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

A molecule with polar bonds must be a polar molecule in all cases.

Correct AnswerverifiedShow Answer

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

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Consider the species O2-, O2, and O2+. Which of these species will be paramagnetic

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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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Give the number of lone pairs around the central atom and the molecular geometry of CBr₄.

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Predict the geometry and polarity of the CS₂ molecule.

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Predict the molecular geometry and polarity of the SO₂ molecule.

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Which of the following substances is/are bent (i) H₂S (ii) . CO₂ (iii) ClNO (iv) NH₂^- (v) O₃

Correct Answer
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Give the number of lone pairs around the central atom and the molecular geometry of XeF₂.

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Predict the geometry around the central atom in SO₄^2-.

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The F -Cl -F bond angles in ClF₃ are expected to be approximately

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CO₂ is nonpolar, but OCS is polar.

Correct Answer
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Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH₃, PH₃, AsH₃.

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

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Consider the species O₂^-, O₂, and O₂⁺. Which of these species will be paramagnetic

Correct Answer
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