Question 1

Consider the species Cl2+, Cl2, and Cl2-. Which of these species will be paramagnetic

Accepted Answer

A)  Only Cl2 
B)  Cl2+ and Cl2 
C)  Cl2 and Cl2- 
D)  Cl2+ and Cl2- 
E)  all three are paramagnetic 
A)  Only Cl2 
B)  Cl2+ and Cl2 
C)  Cl2 and Cl2- 
D)  Cl2+ and Cl2- 
E)  all three are paramagnetic D

Question 2

The geometry of the CS2 molecule is best described as

Accepted Answer

A)  linear. 
B)  trigonal planar. 
C)  tetrahedral. 
D)  bent. 
E)  trigonal pyramidal. 
A)  linear. 
B)  trigonal planar. 
C)  tetrahedral. 
D)  bent. 
E)  trigonal pyramidal. A

Question 3

Give the number of lone pairs around the central atom and the geometry of the ion ClO3-.

Accepted Answer

A)  0 lone pairs, trigonal 
B)  1 lone pair, bent 
C)  1 lone pair, trigonal pyramidal 
D)  2 lone pairs, T-shaped 
E)  2 lone pairs, trigonal 
A)  0 lone pairs, trigonal 
B)  1 lone pair, bent 
C)  1 lone pair, trigonal pyramidal 
D)  2 lone pairs, T-shaped 
E)  2 lone pairs, trigonal C

Question 4

In VSEPR theory the molecular geometry of H3O+ (hydronium ion) is trigonal pyramidal.

Accepted Answer

A) True 
 B)False

Question 5

Use VSEPR theory to predict the geometry of the PCl3 molecule.

Accepted Answer

A)  linear 
B)  bent 
C)  trigonal planar 
D)  trigonal pyramidal 
E)  tetrahedral 
A)  linear 
B)  bent 
C)  trigonal planar 
D)  trigonal pyramidal 
E)  tetrahedral

Question 6

According to the VSEPR theory, the actual F -As -F bond angles in the AsF4- ion are predicted to be

Accepted Answer

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

Question 7

In which one of the following molecules is the central atom sp2 hybridized

Accepted Answer

A)  SO2 
B)  N2O 
C)  BeCl2 
D)  NF3 
E)  PF5 
A)  SO2 
B)  N2O 
C)  BeCl2 
D)  NF3 
E)  PF5

Question 8

List all of the bond angles present in a molecule with a trigonal bipyramidal geometry.

Accepted Answer

A)  45$\circ$ and 120$\circ$ 
B)  90$\circ$ and 180$\circ$ 
C)  60$\circ$ and 120$\circ$ 
D)  90$\circ$ and 120$\circ$ 
E) None of the above 
A)  45$\circ$ and 120$\circ$ 
B)  90$\circ$ and 180$\circ$ 
C)  60$\circ$ and 120$\circ$ 
D)  90$\circ$ and 120$\circ$ 
E) None of the above

Question 9

Which one of the following molecules has a zero dipole moment

Accepted Answer

A)  CO 
B)  CH2Cl2 
C)  SO3 
D)  SO2 
E)  NH3 
A)  CO 
B)  CH2Cl2 
C)  SO3 
D)  SO2 
E)  NH3

Question 10

In which of the following would the bonding be weakened with the subtraction of an electron to form a positive molecular ion

Accepted Answer

A)  N2 
B)  O2 
C)  F2 
D)  H2 
E)  Cl2 
A)  N2 
B)  O2 
C)  F2 
D)  H2 
E)  Cl2

Question 11

According to the VSEPR theory, all of the electron pair-electron pair repulsions about the central atom in PCl3 are of equal magnitude.

Accepted Answer

A) True 
 B)False

Question 12

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

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 
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 13

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 planar 
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 planar

Question 14

According to Molecular Orbital Theory, two separate px orbitals interact about the y-axis to form what molecular orbitals

Accepted Answer

A)  ($\sigma$) and $\sigma$* 
B)  ($\pi$) and $\pi$* 
C)  ($\sigma$), $\sigma$* and $\pi$ 
D)  ($\pi$), $\pi$*, and $\sigma$ 
E)  ($\sigma$), $\sigma$*, $\pi$, and $\pi$* 
A)  ($\sigma$) and $\sigma$* 
B)  ($\pi$) and $\pi$* 
C)  ($\sigma$), $\sigma$* and $\pi$ 
D)  ($\pi$), $\pi$*, and $\sigma$ 
E)  ($\sigma$), $\sigma$*, $\pi$, and $\pi$*

Question 15

The bond angles in SCl2 are expected to be

Accepted Answer

A)  a little less than 109.5$\circ$. 
B)  109.5$\circ$. 
C)  a little more than 109.5$\circ$. 
D)  120$\circ$. 
E)  180$\circ$. 
A)  a little less than 109.5$\circ$. 
B)  109.5$\circ$. 
C)  a little more than 109.5$\circ$. 
D)  120$\circ$. 
E)  180$\circ$.

Question 16

Which of the following species have the same geometries

Accepted Answer

A)  NH2- and H2O 
B)  NH2- and BeH2 
C)  H2O and BeH2 
D)  NH2-, H2O, and BeH2 
A)  NH2- and H2O 
B)  NH2- and BeH2 
C)  H2O and BeH2 
D)  NH2-, H2O, and BeH2

Question 17

Give the number of lone pairs around the central atom and the molecular geometry of IF5.

Accepted Answer

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

Question 18

The bond angles in ICl2- are expected to be

Accepted Answer

A)  a little less than 109.5$\circ$. 
B)  109.5$\circ$. 
C)  a little more than 109.5$\circ$. 
D)  120$\circ$. 
E)  180$\circ$. 
A)  a little less than 109.5$\circ$. 
B)  109.5$\circ$. 
C)  a little more than 109.5$\circ$. 
D)  120$\circ$. 
E)  180$\circ$.

Question 19

The geometry of the SF4 molecule is

Accepted Answer

A)  tetrahedral. 
B)  trigonal pyramidal. 
C)  trigonal planar. 
D)  square planar. 
E)  distorted tetrahedron (seesaw). 
A)  tetrahedral. 
B)  trigonal pyramidal. 
C)  trigonal planar. 
D)  square planar. 
E)  distorted tetrahedron (seesaw).

Question 20

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. 
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.

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

Consider the species Cl2+, Cl2, and Cl2-. Which of these species will be paramagnetic

The geometry of the CS2 molecule is best described as

Give the number of lone pairs around the central atom and the geometry of the ion ClO3-.

In VSEPR theory the molecular geometry of H3O+ (hydronium ion) is trigonal pyramidal.

Use VSEPR theory to predict the geometry of the PCl3 molecule.

According to the VSEPR theory, the actual F -As -F bond angles in the AsF4- ion are predicted to be

In which one of the following molecules is the central atom sp2 hybridized

List all of the bond angles present in a molecule with a trigonal bipyramidal geometry.

Which one of the following molecules has a zero dipole moment

In which of the following would the bonding be weakened with the subtraction of an electron to form a positive molecular ion

According to the VSEPR theory, all of the electron pair-electron pair repulsions about the central atom in PCl3 are of equal magnitude.

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

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

According to Molecular Orbital Theory, two separate px orbitals interact about the y-axis to form what molecular orbitals

The bond angles in SCl2 are expected to be

Which of the following species have the same geometries

Give the number of lone pairs around the central atom and the molecular geometry of IF5.

The bond angles in ICl2- are expected to be

The geometry of the SF4 molecule is

Which of the following is not true of molecular orbitals

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

Consider the species Cl₂⁺, Cl₂, and Cl₂^-. Which of these species will be paramagnetic

The geometry of the CS₂ molecule is best described as

Give the number of lone pairs around the central atom and the geometry of the ion ClO₃^-.

In VSEPR theory the molecular geometry of H₃O⁺ (hydronium ion) is trigonal pyramidal.

Use VSEPR theory to predict the geometry of the PCl₃ molecule.

According to the VSEPR theory, the actual F -As -F bond angles in the AsF₄^- ion are predicted to be

In which one of the following molecules is the central atom sp² hybridized

According to the VSEPR theory, all of the electron pair-electron pair repulsions about the central atom in PCl₃ are of equal magnitude.

Give the number of lone pairs around the central atom and the geometry of the ion IBr₂^-.

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

According to Molecular Orbital Theory, two separate p_x orbitals interact about the y-axis to form what molecular orbitals

The bond angles in SCl₂ are expected to be

Give the number of lone pairs around the central atom and the molecular geometry of IF₅.

The bond angles in ICl₂^- are expected to be

The geometry of the SF₄ molecule is