Question 1

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

Accepted Answer

A)  only (iii) 
B)  only (i) and (v) 
C)  only (i) , (iii) , and (v) 
D)  all are bent except for (iv) 
E)  all are bent except for (ii) F) D) and E)
G) None of the above

Question 2

Draw a Lewis structure for PF5 that shows the correct atom arrangement predicted by VSEPR theory.

Accepted Answer

Question 3

Give the number of lone pairs around the central atom and the geometry of the ion NO2-.

Accepted Answer

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

Question 4

The bond angle in Cl2O is expected to be approximately

Accepted Answer

A)  90°.
B)  109.5°.
C)  120°.
D)  145°.
E)  180°.F) B) and D)
G) C) and D)

Question 5

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever.  How many sigma bonds and pi bonds are contained in an ibuprofen molecule?

Accepted Answer

33 sigma b...

Question 6

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) All of the above
G) C) and E)

Question 7

Predict the geometry around the central atom in PO43-.

Accepted Answer

A)  trigonal planar
B)  trigonal pyramidal
C)  tetrahedral
D)  trigonal bipyramidal
E)  octahedralF) A) and D)
G) None of the above

Question 8

The bond angle in SCl2 is expected to be

Accepted Answer

A)  a little less than 109.5°.
B)  109.5°.
C)  a little more than 109.5°.
D)  120°.
E)  180°.F) A) and E)
G) A) and C)

Question 9

Give the number of lone pairs around the central atom and the geometry of the ion PCl4-.

Accepted Answer

A)  0 lone pairs, tetrahedral
B)  1 lone pair, distorted tetrahedron (seesaw) 
C)  1 lone pair, square pyramidal
D)  1 lone pair, tetrahedral
E)  2 lone pairs, square planarF) B) and E)
G) A) and B)

Question 10

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 B)
G) C) and D)

Question 11

Complete this sentence: The PCl5 molecule has

Accepted Answer

A)  nonpolar bonds, and is a nonpolar molecule.
B)  nonpolar bonds, but is a polar molecule.
C)  polar bonds, and is a polar molecule.
D)  polar bonds, but is a nonpolar molecule.E) C) and D)
F) B) and C)

Question 12

Which of the following is not true of molecular orbitals?

Accepted Answer

A)  The number of molecular orbitals formed is always equal to the number of atomic orbitals combined.
B)  A molecular orbital can accommodate up to two electrons.
C)  When electrons are added to orbitals of the same energy, the most stable arrangement is predicted by Hund's rule.
D)  Low-energy molecular orbitals fill before high-energy molecular orbitals fill.
E)  For any substance, the number of electrons in molecular orbitals is equal to the sum of all the valence electrons on the bonding atoms.F) C) and D)
G) B) and C)

Question 13

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

Accepted Answer

A)  CH4
B)  CH3Br
C)  CH3Cl
D)  CH3F
E)  CH3IF) All of the above
G) A) and D)

Question 14

What is the hybridization on the central atom in NO3- ?

Accepted Answer

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

Question 15

Which of the following correctly lists species in order of increasing bond order?

Accepted Answer

A)  C2 2 2 2
B)  Be2 2 2 2
C)  N2 2 2 2
D)  N2 2 2 2
E)  Be2 2 2 2F) A) and D)
G) C) and D)

Question 16

In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?

Accepted Answer

A)  B2
B)  C2
C)  N2
D)  all of these
E)  none of theseF) D) and E)
G) None of the above

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 C)
G) All of the above

Question 18

Give the number of lone pairs around the central atom and the molecular geometry of SeF4.

Accepted Answer

A)  0 lone pairs, tetrahedral
B)  1 lone pair, distorted tetrahedron (seesaw) 
C)  1 lone pair, square pyramidal
D)  1 lone pair, tetrahedral
E)  2 lone pairs, square planarF) C) and D)
G) All of the above

Question 19

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents.  How many sigma bonds and pi bonds are contained in a DEET molecule?

Accepted Answer

31 sigma b...

Question 20

Give the number of lone pairs around the central atom and the geometry of the ion ClO2-.

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, linearF) A) and B)
G) None of the above

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

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever. How many sigma bonds and pi bonds are contained in an ibuprofen molecule?

Correct Answerverified33 sigma b...View AnswerShow Answer

Give the number of lone pairs around the central atom and the molecular geometry of SeF4.

Correct AnswerverifiedShow Answer

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. How many sigma bonds and pi bonds are contained in a DEET molecule?

Correct Answerverified31 sigma b...View AnswerShow Answer

The bond angle in SCl2 is expected to be

Correct AnswerverifiedShow Answer

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

Give the number of lone pairs around the central atom and the geometry of the ion PCl4-.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?

Correct AnswerverifiedShow Answer

Complete this sentence: The PCl5 molecule has

Correct AnswerverifiedShow Answer

Predict the geometry around the central atom in PO43-.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the hybridization on the central atom in NO3- ?

Correct AnswerverifiedShow Answer

Which of the following is not true of molecular orbitals?

Correct AnswerverifiedShow Answer

The bond angle in Cl2O is expected to be approximately

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Give the number of lone pairs around the central atom and the geometry of the ion ClO2-.

Correct AnswerverifiedShow Answer

Draw a Lewis structure for PF5 that shows the correct atom arrangement predicted by VSEPR theory.

Correct AnswerverifiedShow Answer

Give the number of lone pairs around the central atom and the geometry of the ion NO2-.

Correct AnswerverifiedShow Answer

Which of the following correctly lists species in order of increasing bond order?

Correct AnswerverifiedShow Answer

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

Correct Answer
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33 sigma b...
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Give the number of lone pairs around the central atom and the molecular geometry of SeF₄.

Correct Answer
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31 sigma b...
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The bond angle in SCl₂ is expected to be

Correct Answer
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Give the number of lone pairs around the central atom and the geometry of the ion PCl₄^-.

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

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Complete this sentence: The PCl₅ molecule has

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Predict the geometry around the central atom in PO₄^3-.

Correct Answer
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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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What is the hybridization on the central atom in NO₃^- ?

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The bond angle in Cl₂O is expected to be approximately

Correct Answer
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Give the number of lone pairs around the central atom and the geometry of the ion ClO₂^-.

Correct Answer
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Draw a Lewis structure for PF₅ that shows the correct atom arrangement predicted by VSEPR theory.

Correct Answer
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Give the number of lone pairs around the central atom and the geometry of the ion NO₂^-.

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