Question 1

What is the molecular geometry of the bromate ion,BrO3-?

Accepted Answer

A) square planar 
B) trigonal planar 
C) square pyramidal 
D) tetrahedral 
E) trigonal pyramidal 
A) square planar 
B) trigonal planar 
C) square pyramidal 
D) tetrahedral 
E) trigonal pyramidal E

Question 2

What is the electron geometry (or electron arrangement)around an atom in a molecule or ion which is surrounded by zero lone pairs of electrons and six single bonds.

Accepted Answer

A) octahedral 
B) square pyramidal 
C) square planar 
D) bent 
E) linear 
A) octahedral 
B) square pyramidal 
C) square planar 
D) bent 
E) linear A

Question 3

Which molecule or ion does not have a planar molecular geometry?

Accepted Answer

A) NO3- 
B) BF3 
C) F2CO 
D) C2H4 
E) SO32- 
A) NO3- 
B) BF3 
C) F2CO 
D) C2H4 
E) SO32- E

Question 4

Which of the following species has(have)a bond order of 1?
1)HF
2)O22−
3)O22+

Accepted Answer

A) 1 only 
B) 3 only 
C) 1 and 2 
D) 2 and 3 
E) 2 only 
A) 1 only 
B) 3 only 
C) 1 and 2 
D) 2 and 3 
E) 2 only

Question 5

Which molecule or ion has the same molecular geometry for its central atom as the carbonate ion?

Accepted Answer

A) H2CO 
B) AsCl3 
C) PF3 
D) CH3- 
E) BrO3- 
A) H2CO 
B) AsCl3 
C) PF3 
D) CH3- 
E) BrO3-

Question 6

Which of the following electron distributions among the molecular orbitals best describes the NO molecule?
Σ2s
Σ2s*
Π2py=π2px
Σ2pz
Π2py*=π2px*
Σ2pz*

Accepted Answer

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

Question 7

Which one of the following statements provides the best evidence that all the carbon compounds listed below have tetrahedral molecular geometries instead of square planar molecular geometries?

Accepted Answer

A) Only one CH4 compound is known and it is nonpolar. 
B) Only one CH3F compound is known and it is polar. 
C) Only one CH2F2 compound is known and it is polar. 
D) Only one CF4 compound is known and it is nonpolar. 
E) Only one CHF3 compound is known and it is polar. 
A) Only one CH4 compound is known and it is nonpolar. 
B) Only one CH3F compound is known and it is polar. 
C) Only one CH2F2 compound is known and it is polar. 
D) Only one CF4 compound is known and it is nonpolar. 
E) Only one CHF3 compound is known and it is polar.

Question 8

What is the molecular geometry around an atom in a molecule or ion which is surrounded by two lone pairs of electrons and four single bonds.

Accepted Answer

A) square planar 
B) square pyramidal 
C) octahedral 
D) bent 
E) linear 
A) square planar 
B) square pyramidal 
C) octahedral 
D) bent 
E) linear

Question 9

What is the H-O-H bond angle in water?

Accepted Answer

A) 90° 
B) slightly less than 109° 
C) 180° 
D) 120° 
E) 109° 
A) 90° 
B) slightly less than 109° 
C) 180° 
D) 120° 
E) 109°

Question 10

Which molecule is polar?

Accepted Answer

A) C2H4 
B) CS2 
C) C6H6 
D) SO2 
E) CF4 
A) C2H4 
B) CS2 
C) C6H6 
D) SO2 
E) CF4

Question 11

Consider the following series of molecular ions and molecules: F2+,F22+,F2,and F2-.Which will have the shortest bond length between the fluorine atoms? Assume the homonuclear molecular orbital diagram provided below for nitrogen (excluding the K shells)still applies to these species.

Accepted Answer

A) F2+ 
B) The bond lengths are all equivalent. 
C) F22+ 
D) F2 
E) F2- 
A) F2+ 
B) The bond lengths are all equivalent. 
C) F22+ 
D) F2 
E) F2-

Question 12

Which of the following statements is not correct?

Accepted Answer

A) Hybrid orbitals are made by the combination of atomic orbitals on a given atom. 
B) In both valence bond theory and molecular orbital theory bonding result from the overlap of occupied atomic orbitals. 
C) Valence bond theory does not account for the experimentally observed paramagnetism of molecules like O2. 
D) Pi bonds may be formed from s or p orbital overlap. 
E) In molecular orbital theory a molecular orbital may encompass more than two atoms. 
A) Hybrid orbitals are made by the combination of atomic orbitals on a given atom. 
B) In both valence bond theory and molecular orbital theory bonding result from the overlap of occupied atomic orbitals. 
C) Valence bond theory does not account for the experimentally observed paramagnetism of molecules like O2. 
D) Pi bonds may be formed from s or p orbital overlap. 
E) In molecular orbital theory a molecular orbital may encompass more than two atoms.

Question 13

Which molecule or ion has a bond order of 2.5?

Accepted Answer

A) O2 
B) O2+ 
C) NO- 
D) O22- 
E) O2- 
A) O2 
B) O2+ 
C) NO- 
D) O22- 
E) O2-

Question 14

Which of the following molecules has a permanent dipole moment?

Accepted Answer

A) SF6 
B) CCl4 
C) NF3 
D) SiCl4 
E) BF3 
A) SF6 
B) CCl4 
C) NF3 
D) SiCl4 
E) BF3

Question 15

What is the molecular geometry around oxygen atom O1?
​

Accepted Answer

A) bent 
B) tetrahedral 
C) see-saw or distorted tetrahedral 
D) trigonal planar 
E) T-shaped 
A) bent 
B) tetrahedral 
C) see-saw or distorted tetrahedral 
D) trigonal planar 
E) T-shaped

Question 16

In phosgene,COCl2,the electron groups are located about the central carbon atom in a ______________ arrangement.

Accepted Answer

A) square planar 
B) trigonal bipyramidal 
C) pyramidal 
D) trigonal planar 
E) tetrahedral 
A) square planar 
B) trigonal bipyramidal 
C) pyramidal 
D) trigonal planar 
E) tetrahedral

Question 17

What is the molecular geometry around an atom in a molecule or ion which is surrounded by five single bonds and no lone pairs of electrons.

Accepted Answer

A) trigonal bipyramidal 
B) octahedral 
C) linear 
D) trigonal planar 
E) tetrahedral 
A) trigonal bipyramidal 
B) octahedral 
C) linear 
D) trigonal planar 
E) tetrahedral

Question 18

In the ICI4- ion,how many electron groups surround the central iodine atom?

Accepted Answer

A) 2 
B) 4 
C) 5 
D) 6 
E) 3 
A) 2 
B) 4 
C) 5 
D) 6 
E) 3

Question 19

According to valence-bond theory,what is the hybridization scheme of the sulfur atom in SF4?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 20

What is the H-C-C bond angle in ethylene,H2CCH2?

Accepted Answer

A) slightly less than 120° 
B) 90° 
C) 109° 
D) 120° 
E) 180° 
A) slightly less than 120° 
B) 90° 
C) 109° 
D) 120° 
E) 180°

Exam 10: Molecular Geometry and Chemical Bonding Theory

What is the molecular geometry of the bromate ion,BrO3-?

What is the electron geometry (or electron arrangement)around an atom in a molecule or ion which is surrounded by zero lone pairs of electrons and six single bonds.

Which molecule or ion does not have a planar molecular geometry?

Which of the following species has(have)a bond order of 1? 1)HF 2)O22− 3)O22+

Which molecule or ion has the same molecular geometry for its central atom as the carbonate ion?

Which of the following electron distributions among the molecular orbitals best describes the NO molecule? Σ2s Σ2s* Π2py=π2px Σ2pz Π2py*=π2px* Σ2pz*

Which one of the following statements provides the best evidence that all the carbon compounds listed below have tetrahedral molecular geometries instead of square planar molecular geometries?

What is the molecular geometry around an atom in a molecule or ion which is surrounded by two lone pairs of electrons and four single bonds.

What is the H-O-H bond angle in water?

Which molecule is polar?

Consider the following series of molecular ions and molecules: F2+,F22+,F2,and F2-.Which will have the shortest bond length between the fluorine atoms? Assume the homonuclear molecular orbital diagram provided below for nitrogen (excluding the K shells)still applies to these species.

Which of the following statements is not correct?

Which molecule or ion has a bond order of 2.5?

Which of the following molecules has a permanent dipole moment?

What is the molecular geometry around oxygen atom O1? ​

In phosgene,COCl2,the electron groups are located about the central carbon atom in a ______________ arrangement.

What is the molecular geometry around an atom in a molecule or ion which is surrounded by five single bonds and no lone pairs of electrons.

In the ICI4- ion,how many electron groups surround the central iodine atom?

According to valence-bond theory,what is the hybridization scheme of the sulfur atom in SF4?

What is the H-C-C bond angle in ethylene,H2CCH2?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

What is the molecular geometry of the bromate ion,BrO₃^-?

Which of the following species has(have)a bond order of 1? 1)HF 2)O₂²⁻ 3)O₂²⁺

Which of the following electron distributions among the molecular orbitals best describes the NO molecule? Σ_2s Σ_2s^* Π_2py=π_2px Σ_2pz Π_2py^=π_2px^ Σ_2pz^*

Consider the following series of molecular ions and molecules: F₂⁺,F₂²⁺,F₂,and F₂^-.Which will have the shortest bond length between the fluorine atoms? Assume the homonuclear molecular orbital diagram provided below for nitrogen (excluding the K shells)still applies to these species.

What is the molecular geometry around oxygen atom O₁?

In phosgene,COCl₂,the electron groups are located about the central carbon atom in a ______________ arrangement.

In the ICI₄^- ion,how many electron groups surround the central iodine atom?

According to valence-bond theory,what is the hybridization scheme of the sulfur atom in SF₄?

What is the H-C-C bond angle in ethylene,H₂CCH₂?