Question 1

The hybridization of the central atom in ClF2+ is:

Accepted Answer

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

Question 2

Which of the following has the shortest bond length?

Accepted Answer

A) O22- 
B) O2 
C) O2- 
D) O2+ 
E) Two of these have the shortest bond length. 
A) O22- 
B) O2 
C) O2- 
D) O2+ 
E) Two of these have the shortest bond length. D

Question 3

The hybridization of the carbon atom in the cation CH3+ is:

Accepted Answer

A) sp2 
B) sp3 
C) dsp 
D) sp 
E) none of these 
A) sp2 
B) sp3 
C) dsp 
D) sp 
E) none of these A

Question 4

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

Accepted Answer

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

Question 5

Use the molecules below to answer the next three questions.  
-Which molecule(s)have equivalent C-C bonds throughout the molecule?

Accepted Answer

A) I 
B) II 
C) III 
D) all of the above 
E) none of the above 
A) I 
B) II 
C) III 
D) all of the above 
E) none of the above

Question 6

Which of the following statements about the molecule BN is false?

Accepted Answer

A) It is paramagnetic. 
B) Its bond order is 2. 
C) The total number of electrons is 12. 
D) It has two pi bonds. 
E) All of these are true. 
A) It is paramagnetic. 
B) Its bond order is 2. 
C) The total number of electrons is 12. 
D) It has two pi bonds. 
E) All of these are true.

Question 7

How many electrons are involved in pi bonding in benzene,C6H6?

Accepted Answer

A) 12 
B) 30 
C) 3 
D) 6 
E) 18 
A) 12 
B) 30 
C) 3 
D) 6 
E) 18

Question 8

Which charge(s)on an O2 ion would give a bond order of 2.5?

Accepted Answer

A) -2 
B) -1 
C) +1 
D) two of these 
E) none of these 
A) -2 
B) -1 
C) +1 
D) two of these 
E) none of these

Question 9

Which of the following statements is false?

Accepted Answer

A) C2 is paramagnetic. 
B) C2 is diamagnetic. 
C) The carbon-carbon bond in C22- is stronger than the one in CH3CH3. 
D) The carbon-carbon bond in C22- is shorter than the one in CH3CH3. 
E) Two of the above. 
A) C2 is paramagnetic. 
B) C2 is diamagnetic. 
C) The carbon-carbon bond in C22- is stronger than the one in CH3CH3. 
D) The carbon-carbon bond in C22- is shorter than the one in CH3CH3. 
E) Two of the above.

Question 10

The hybridization of the central atom in XeF5+ is:

Accepted Answer

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

Question 11

__________ causes a substance to be attracted into the inducing magnetic field.

Accepted Answer

The answer of __________ causes a substance to be attracted...

Question 12

The number of molecular orbitals formed is always __________ the number of atomic orbitals combined.

Accepted Answer

The answer of The number of molecular orbitals formed is...

Question 13

Sulfur trioxide is known to be planar with all the oxygen atoms equidistant from the central sulfur atom.On the basis of these facts,which of the following conclusions may be drawn concerning this molecule? I.It can be represented by three equivalent resonance structures.
II.The dipoles associated with each S-O bond are equal in magnitude.
III.The sulfur atom is sp2 hybridized.

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II only 
E) I,II,and III 
A) I only 
B) II only 
C) III only 
D) I and II only 
E) I,II,and III

Question 14

The hybridization of the central atom,Al,in AlBr3 is

Accepted Answer

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

Question 15

Tetracyanoethylene has the skeleton shown below:   From its Lewis structure determine the following:
-How many sigma and pi bonds are in the molecule?

Accepted Answer

A) 4 sigma and 5 pi 
B) 6 sigma and 8 pi 
C) 9 sigma and 8 pi 
D) 9 sigma and 9 pi 
E) 5 sigma and 8 pi 
A) 4 sigma and 5 pi 
B) 6 sigma and 8 pi 
C) 9 sigma and 8 pi 
D) 9 sigma and 9 pi 
E) 5 sigma and 8 pi

Question 16

Tetracyanoethylene has the skeleton shown below:   From its Lewis structure determine the following:
-How many of the atoms are sp2 hybridized?

Accepted Answer

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

Question 17

Consider three molecules - A,B,C.Molecule A has a hybridization of sp3.Molecule B has two more effective pairs (electron pairs around the central atom)than molecule A.Molecule C consists of one  $\sigma$ bond and two $\pi$ bonds.Give the molecular structure,hybridization,bond angles,and an example for each molecule.

Accepted Answer

The answer of Consider three molecules - A,B,C.Molecule A has...

Question 18

How many of the following: F2,B2,O2,N2 ,are paramagnetic?

Accepted Answer

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

Question 19

Which of these statements about benzene is true?

Accepted Answer

A) All carbon atoms in benzene are sp3 hybridized. 
B) Benzene contains only $\pi$ bonds between C atoms. 
C) The bond order of each C-C bond in benzene is 1.5. 
D) Benzene is an example of a molecule that displays ionic bonding. 
E) All of these statements are false. 
A) All carbon atoms in benzene are sp3 hybridized. 
B) Benzene contains only $\pi$ bonds between C atoms. 
C) The bond order of each C-C bond in benzene is 1.5. 
D) Benzene is an example of a molecule that displays ionic bonding. 
E) All of these statements are false.

Question 20

How many unpaired electrons in the F22+ ion are based on molecular orbital theory? The order of the molecular orbitals are ( $\sigma$2s)( $\sigma$*2s)( $\sigma$2p)($\pi$2p)($\pi$*2p)( $\sigma$*2p).

Accepted Answer

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

The hybridization of the central atom in ClF₂⁺ is:

Which of the following has the shortest bond length?

The hybridization of the carbon atom in the cation CH₃⁺ is:

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

Use the molecules below to answer the next three questions. -Which molecule(s)have equivalent C-C bonds throughout the molecule?

Which of the following statements about the molecule BN is false?

How many electrons are involved in pi bonding in benzene,C₆H₆?

Which charge(s)on an O₂ ion would give a bond order of 2.5?

Which of the following statements is false?

The hybridization of the central atom in XeF₅⁺ is:

__________ causes a substance to be attracted into the inducing magnetic field.

The number of molecular orbitals formed is always __________ the number of atomic orbitals combined.

The hybridization of the central atom,Al,in AlBr₃ is

Tetracyanoethylene has the skeleton shown below: From its Lewis structure determine the following: -How many sigma and pi bonds are in the molecule?

Tetracyanoethylene has the skeleton shown below: From its Lewis structure determine the following: -How many of the atoms are sp² hybridized?

How many of the following: F₂,B₂,O₂,N₂ ,are paramagnetic?

Which of these statements about benzene is true?

How many unpaired electrons in the F₂²⁺ ion are based on molecular orbital theory? The order of the molecular orbitals are ( $\sigma$ _2s)( $\sigma$ _2s)( $\sigma$ _2p)( $\pi$ _2p)( $\pi$ _2p)( $\sigma$ *_2p).

Chemical Foundations

Atoms, molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Thermochemistry

Atomic Structure and Periodicity

Bonding: General Concepts

Liquids and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

Spontaneity, entropy, and Free Energy

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The Nucleus: a Chemists View

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Exam 9: Covalent Bonding: Orbitals

The hybridization of the central atom in ClF2+ is:

Which of the following has the shortest bond length?

The hybridization of the carbon atom in the cation CH3+ is:

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

Use the molecules below to answer the next three questions. -Which molecule(s)have equivalent C-C bonds throughout the molecule?

Which of the following statements about the molecule BN is false?

How many electrons are involved in pi bonding in benzene,C6H6?

Which charge(s)on an O2 ion would give a bond order of 2.5?

Which of the following statements is false?

The hybridization of the central atom in XeF5+ is:

__________ causes a substance to be attracted into the inducing magnetic field.

The number of molecular orbitals formed is always __________ the number of atomic orbitals combined.

The hybridization of the central atom,Al,in AlBr3 is

Tetracyanoethylene has the skeleton shown below: From its Lewis structure determine the following: -How many sigma and pi bonds are in the molecule?

Tetracyanoethylene has the skeleton shown below: From its Lewis structure determine the following: -How many of the atoms are sp2 hybridized?

How many of the following: F2,B2,O2,N2 ,are paramagnetic?

Which of these statements about benzene is true?

How many unpaired electrons in the F22+ ion are based on molecular orbital theory? The order of the molecular orbitals are ( σ\sigmaσ 2s)( σ\sigmaσ *2s)( σ\sigmaσ 2p)( π\piπ 2p)( π\piπ *2p)( σ\sigmaσ *2p).

Chemical Foundations

Atoms, molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Thermochemistry

Atomic Structure and Periodicity

Bonding: General Concepts

Liquids and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

Spontaneity, entropy, and Free Energy

Electrochemistry

The Nucleus: a Chemists View

The Representative Elements

Transition Metals and Coordination Chemistry

Organic and Biological Molecules

Filters

The hybridization of the central atom in ClF₂⁺ is:

The hybridization of the carbon atom in the cation CH₃⁺ is:

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

How many electrons are involved in pi bonding in benzene,C₆H₆?

Which charge(s)on an O₂ ion would give a bond order of 2.5?

The hybridization of the central atom in XeF₅⁺ is:

The hybridization of the central atom,Al,in AlBr₃ is

Tetracyanoethylene has the skeleton shown below: From its Lewis structure determine the following: -How many of the atoms are sp² hybridized?

How many of the following: F₂,B₂,O₂,N₂ ,are paramagnetic?

How many unpaired electrons in the F₂²⁺ ion are based on molecular orbital theory? The order of the molecular orbitals are ( $\sigma$ _2s)( $\sigma$ _2s)( $\sigma$ _2p)( $\pi$ _2p)( $\pi$ _2p)( $\sigma$ *_2p).