Question 1

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

Accepted Answer

A)  O2 2+ 2- 
B)  O2- 2 2+ 
C)  O2+ 2 2- 
D)  O2- 2+ 2 
E)  O2+ 2- 2 
A)  O2 2+ 2- 
B)  O2- 2 2+ 
C)  O2+ 2 2- 
D)  O2- 2+ 2 
E)  O2+ 2- 2

Question 2

The bond in B2 is longer than the bond in B2-.

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2

Question 4

An sp3 hybridized central carbon atom with no lone pairs of electrons has what type of bonding

Accepted Answer

A) 1 $\pi$ and 2 $\sigma$bonds 
B) 1 $\pi$ and 3 $\sigma$ bonds 
C) 2 $\pi$ and 2 $\sigma$ bonds 
D) 3 $\pi$ and 2 $\sigma$ bonds 
E) 0 $\pi$ and 4 $\sigma$ bonds 
A) 1 $\pi$ and 2 $\sigma$bonds 
B) 1 $\pi$ and 3 $\sigma$ bonds 
C) 2 $\pi$ and 2 $\sigma$ bonds 
D) 3 $\pi$ and 2 $\sigma$ bonds 
E) 0 $\pi$ and 4 $\sigma$ bonds

Question 5

What is the bond order of Cl2-

Accepted Answer

A)  0 
B)  0.5 
C)  1 
D)  1.5 
E)  2 
A)  0 
B)  0.5 
C)  1 
D)  1.5 
E)  2

Question 6

Pi bonds are covalent bonds in which the electron density is concentrated above and below a plane containing the nuclei of the bonding atoms.

Accepted Answer

A) True 
 B)False

Question 7

Which one of the following molecules is polar

Accepted Answer

A)  PBr5 
B)  CCl4 
C)  BrF5 
D)  XeF2 
E)  XeF4 
A)  PBr5 
B)  CCl4 
C)  BrF5 
D)  XeF2 
E)  XeF4

Question 8

A sp hybridized terminal oxygen atom (bonded to one other atom only) with 1 lone pair of electrons has what type of bonding

Accepted Answer

A)  1 $\pi$ and 2 $\sigma$ bonds 
B)  2 $\pi$ and 1 $\sigma$ bonds 
C)  2 $\pi$ and 2 $\sigma$ bonds 
D)  0 $\pi$ and 2 $\sigma$ bonds 
E)  0 $\pi$ and 3 $\sigma$ bonds 
A)  1 $\pi$ and 2 $\sigma$ bonds 
B)  2 $\pi$ and 1 $\sigma$ bonds 
C)  2 $\pi$ and 2 $\sigma$ bonds 
D)  0 $\pi$ and 2 $\sigma$ bonds 
E)  0 $\pi$ and 3 $\sigma$ bonds

Question 9

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 these 
A)  B2 
B)  C2 
C)  N2 
D)  all of these 
E)  none of these

Question 10

A molecule with 3 single bonds (and any number of lone pairs) could have which of the following molecular geometries
I. Trigonal planar
II. Trigonal pyramidal
III. Seesaw
IV. T-shaped

Accepted Answer

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

Question 11

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 12

The F - S - F bond angles in SF6 are

Accepted Answer

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

Question 13

Ozone (O3) is an allotropic form of oxygen. According to VSEPR theory the shape of the ozone molecule is bent.

Accepted Answer

A) True 
 B)False

Question 14

The N - N - H bond angles in hydrazine N2H4 are 112$\circ$. What is the hybridization of the nitrogen orbitals predicted by valence bond theory

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E) None of the above 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E) None of the above

Question 15

Which one of the following molecules is nonpolar

Accepted Answer

A)  NH3 
B)  OF2 
C)  CH3Cl 
D)  H2O 
E)  BeCl2 
A)  NH3 
B)  OF2 
C)  CH3Cl 
D)  H2O 
E)  BeCl2

Question 16

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
33 sigma bonds and 4 pi bonds

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2

Question 18

The BrF5 molecule has polar bonds and has a net dipole moment.

Accepted Answer

A) True 
 B)False

Question 19

N,N-diethyl-m-tolumide (DEET) is the active ingredient in many mosquito repellents.   There are 30 sigma bonds and 4 pi bonds are contained in a DEET molecule.

Accepted Answer

A) True 
 B)False

Question 20

Which one of the following molecules has tetrahedral geometry

Accepted Answer

A)  XeF4 
B)  BF3 
C)  AsF5 
D)  CF4 
E)  NH3 
A)  XeF4 
B)  BF3 
C)  AsF5 
D)  CF4 
E)  NH3

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

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

The bond in B2 is longer than the bond in B2-.

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

An sp3 hybridized central carbon atom with no lone pairs of electrons has what type of bonding

What is the bond order of Cl2-

Pi bonds are covalent bonds in which the electron density is concentrated above and below a plane containing the nuclei of the bonding atoms.

Which one of the following molecules is polar

A sp hybridized terminal oxygen atom (bonded to one other atom only) with 1 lone pair of electrons has what type of bonding

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

A molecule with 3 single bonds (and any number of lone pairs) could have which of the following molecular geometries I. Trigonal planar II. Trigonal pyramidal III. Seesaw IV. T-shaped

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

The F - S - F bond angles in SF6 are

Ozone (O3) is an allotropic form of oxygen. According to VSEPR theory the shape of the ozone molecule is bent.

The N - N - H bond angles in hydrazine N2H4 are 112 ∘\circ∘ . What is the hybridization of the nitrogen orbitals predicted by valence bond theory

Which one of the following molecules is nonpolar

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 33 sigma bonds and 4 pi bonds

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

The BrF5 molecule has polar bonds and has a net dipole moment.

N,N-diethyl-m-tolumide (DEET) is the active ingredient in many mosquito repellents. There are 30 sigma bonds and 4 pi bonds are contained in a DEET molecule.

Which one of the following molecules has tetrahedral geometry

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

The bond in B₂ is longer than the bond in B₂^-.

An sp³ hybridized central carbon atom with no lone pairs of electrons has what type of bonding

What is the bond order of Cl₂^-

The F - S - F bond angles in SF₆ are

Ozone (O₃) is an allotropic form of oxygen. According to VSEPR theory the shape of the ozone molecule is bent.

The N - N - H bond angles in hydrazine N₂H₄ are 112^$\circ$. What is the hybridization of the nitrogen orbitals predicted by valence bond theory

The BrF₅ molecule has polar bonds and has a net dipole moment.