Question 1

Consider the molecule and the following hybridization choices: 2 C) sp3 D) dsp3 E) d2sp3" class="answers-bank-image d-inline" rel="preload" >
-What is the hybridization of the nitrogen atom?

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  dsp3
E)  d2sp3

Question 2

The hybridization of the central atom in NO3- is

Accepted Answer

A)  p3
B)  sp2
C)  sp3
D)  sp
E)  dsp2

Question 3

Which of the nitrogen-containing molecules below is paramagnetic in its lowest energy state?

Accepted Answer

A)  N2
B)  NO
C)  NH3
D)  N2H4
E)  none of these

Question 4

As the bond order of a bond increases,the bond energy ______ and the bond length ______.

Accepted Answer

A)  increases,increases
B)  decreases,decreases
C)  increases,decreases
D)  decreases,increases
E)  More information is needed to answer this question.

Question 5

The hybridization of a molecule is measured to determine the shape of the molecule.

Accepted Answer

A) True 
 B)False

Question 6

According to MO theory,F2 should be diamagnetic.

Accepted Answer

A) True 
 B)False

Question 7

For how many of the following does the bond order decrease if you add one electron to the neutral molecule? B2,C2,P2,F2

Accepted Answer

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

Question 8

__________ is the difference between the number of bonding electrons and the number of antibonding electrons divided by two.

Accepted Answer

The answer of __________ is the difference between the number...

Question 9

Which of the following has the largest bond order?

Accepted Answer

A)  N2
B)  N2-
C)  N22-
D)  N2+
E)  N22+

Question 10

If a molecule demonstrates paramagnetism,then :
I.The substance can have both paired and unpaired electrons.
II.The bond order is not a whole number.
III.It can be determined by drawing a Lewis structure.
IV.It must be an ion.

Accepted Answer

A)  I,II
B)  I,II,IV
C)  II,III
D)  I only
E)  All of the above are correct.

Question 11

Explain the concept of delocalization of electrons in SO3.Indicate how this idea relates to resonance.

Accepted Answer

When we draw the Lewis dot structure for...

Question 12

When a carbon atom has sp3 hybridization,it has

Accepted Answer

A)  four  π\piπ  bonds
B)  three  π\piπ  bonds and one   σ\sigmaσ  bond
C)  two  π\piπ  bonds and two   σ\sigmaσ  bonds
D)  one  π\piπ  bond and three   σ\sigmaσ  bonds
E)  four   σ\sigmaσ  bonds

Question 13

Tetracyanoethylene has the skeleton shown below:  From its Lewis structure determine the following:
-How many of the atoms are sp hybridized?

Accepted Answer

A)  2
B)  4
C)  6
D)  8
E)  10

Question 14

A species has the following MO configuration: (  σ\sigmaσ 1s) 2(  σ\sigmaσ 1s*) 2(  σ\sigmaσ 2s) 2(  σ\sigmaσ 2s*) 2(  σ\sigmaσ 2p) 2( π\piπ 2p) 2
This substance is

Accepted Answer

A)  paramagnetic with one unpaired electron
B)  paramagnetic with two unpaired electrons
C)  paramagnetic with three unpaired electrons
D)  paramagnetic with four unpaired electrons
E)  diamagnetic

Question 15

The hybridization of the central atom in I3- is:

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  dsp3
E)  d2sp3

Question 16

Which of the following statements about the species CN- is false?

Accepted Answer

A)  It is paramagnetic.
B)  The total number of electrons is 14.
C)  Its bond order is 3.
D)  It has two pi bonds.
E)  All of these are true.

Question 17

For which of the following diatomic molecules would the bond order become greater if an electron is removed (i.e. ,if the molecule is converted to the positive ion in its ground state) ?

Accepted Answer

A)  B2
B)  C2
C)  P2
D)  F2
E)  Na2

Question 18

Draw a molecular orbital diagram for O2 and N2.Using molecular orbital theory,explain why the removal of one electron in O2 strengthens bonding,while the removal of one electron in N2 weakens bonding.

Accepted Answer

The bond order for N₂ is 3,b...

Question 19

When an electron pair is shared in the area centered on a line joining the atoms,a  $\sigma$ (sigma)bond is formed.

Accepted Answer

A) True 
 B)False

Question 20

Consider the skeletal structure shown below:
N-C-C-N
Draw the Lewis structure and answer the following:
-How many pi bonds does the molecule contain?

Accepted Answer

A)  0
B)  2
C)  4
D)  6
E)  7

Exam 9: Covalent Bonding: Orbitals

Explain the concept of delocalization of electrons in SO3.Indicate how this idea relates to resonance.

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Draw a molecular orbital diagram for O2 and N2.Using molecular orbital theory,explain why the removal of one electron in O2 strengthens bonding,while the removal of one electron in N2 weakens bonding.

Correct Answerverified The bond order for N2 is 3,b...View AnswerShow Answer

When a carbon atom has sp3 hybridization,it has

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The hybridization of a molecule is measured to determine the shape of the molecule.

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Consider the skeletal structure shown below: N-C-C-N Draw the Lewis structure and answer the following: -How many pi bonds does the molecule contain?

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__________ is the difference between the number of bonding electrons and the number of antibonding electrons divided by two.

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Which of the following has the largest bond order?

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A species has the following MO configuration: ( σ\sigmaσ 1s) 2( σ\sigmaσ 1s*) 2( σ\sigmaσ 2s) 2( σ\sigmaσ 2s*) 2( σ\sigmaσ 2p) 2( π\piπ 2p) 2 This substance is

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Consider the molecule and the following hybridization choices: -What is the hybridization of the nitrogen atom?

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Which of the following statements about the species CN- is false?

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According to MO theory,F2 should be diamagnetic.

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Which of the nitrogen-containing molecules below is paramagnetic in its lowest energy state?

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Tetracyanoethylene has the skeleton shown below: From its Lewis structure determine the following: -How many of the atoms are sp hybridized?

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The hybridization of the central atom in I3- is:

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When an electron pair is shared in the area centered on a line joining the atoms,a σ\sigmaσ (sigma)bond is formed.

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For which of the following diatomic molecules would the bond order become greater if an electron is removed (i.e. ,if the molecule is converted to the positive ion in its ground state) ?

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As the bond order of a bond increases,the bond energy ______ and the bond length ______.

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The hybridization of the central atom in NO3- is

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If a molecule demonstrates paramagnetism,then : I.The substance can have both paired and unpaired electrons. II.The bond order is not a whole number. III.It can be determined by drawing a Lewis structure. IV.It must be an ion.

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For how many of the following does the bond order decrease if you add one electron to the neutral molecule? B2,C2,P2,F2

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Explain the concept of delocalization of electrons in SO₃.Indicate how this idea relates to resonance.

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When we draw the Lewis dot structure for...
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Draw a molecular orbital diagram for O₂ and N₂.Using molecular orbital theory,explain why the removal of one electron in O₂ strengthens bonding,while the removal of one electron in N₂ weakens bonding.

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The bond order for N₂ is 3,b...
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When a carbon atom has sp³ hybridization,it has

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A species has the following MO configuration: ( $\sigma$ _1s) ²( $\sigma$ _1s) ²( $\sigma$ _2s) ²( $\sigma$ _2s) ²( $\sigma$ _2p) ²( $\pi$ _2p) ² This substance is

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Which of the following statements about the species CN^- is false?

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According to MO theory,F₂ should be diamagnetic.

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The hybridization of the central atom in I₃^- is:

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When an electron pair is shared in the area centered on a line joining the atoms,a $\sigma$ (sigma)bond is formed.

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As the bond order of a bond increases,the bond energy and the bond length .

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The hybridization of the central atom in NO₃^- is

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For how many of the following does the bond order decrease if you add one electron to the neutral molecule? B₂,C₂,P₂,F₂

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