Question 1

For which of the following molecules or ions do the electron pairs on the central nitrogen atom have a tetrahedral arrangement?

Accepted Answer

A) FNO 
B) NF2- 
C) N2F2 
D) NO2- 
E) NO- 
A) FNO 
B) NF2- 
C) N2F2 
D) NO2- 
E) NO-

Question 2

Which molecule or ion has the shortest bond distance?

Accepted Answer

A) NO+ 
B) CO+ 
C) NO 
D) NO- 
E) CO- 
A) NO+ 
B) CO+ 
C) NO 
D) NO- 
E) CO-

Question 3

What is the molecular geometry around an atom in a molecule or ion which is surrounded by one lone pair of electrons and three single bonds.

Accepted Answer

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

Question 4

Which molecule or ion is nonlinear?

Accepted Answer

A) CO2 
B) NF2- 
C) OCN- 
D) NO2+ 
E) HCCH 
A) CO2 
B) NF2- 
C) OCN- 
D) NO2+ 
E) HCCH

Question 5

The molecular geometry of the CH3- ion is

Accepted Answer

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

Question 6

Which of the following molecules has a dipole moment?

Accepted Answer

A) PF5 
B) FOOF 
C) HCCH 
D) F2CCF2 
E) SF6 
A) PF5 
B) FOOF 
C) HCCH 
D) F2CCF2 
E) SF6

Question 7

What is the hybridization of I in IF4-?

Accepted Answer

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

Question 8

Which molecule or ion has the same molecular geometry for its central atom(s)as BF3?

Accepted Answer

A) CF4 
B) CH3- 
C) BF4- 
D) C2F4 
E) C2F6 
A) CF4 
B) CH3- 
C) BF4- 
D) C2F4 
E) C2F6

Question 9

What hybrid orbitals of sulfur are involved in the bonding in sulfur trioxide?

Accepted Answer

A) sp2 
B) sp2d 
C) sp3 
D) sp3d2 
E) sp 
A) sp2 
B) sp2d 
C) sp3 
D) sp3d2 
E) sp

Question 10

Which molecule or ion has the same molecular geometry as SeO32-?

Accepted Answer

A) SeO3 
B) CO32- 
C) NO3- 
D) SO32- 
E) SO3 
A) SeO3 
B) CO32- 
C) NO3- 
D) SO32- 
E) SO3

Question 11

Which of the following molecules does not have a permanent dipole moment?

Accepted Answer

A) iodine trichloride,ICl3 
B) nitrogen trifluoride,NF3 
C) sulfur dioxide,SO2 
D) carbon tetrachloride,CCl4 
E) hydrogen fluoride,HF 
A) iodine trichloride,ICl3 
B) nitrogen trifluoride,NF3 
C) sulfur dioxide,SO2 
D) carbon tetrachloride,CCl4 
E) hydrogen fluoride,HF

Question 12

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

Accepted Answer

A) ClF4- 
B) SiF4 
C) NF4+ 
D) CF4 
E) BF4- 
A) ClF4- 
B) SiF4 
C) NF4+ 
D) CF4 
E) BF4-

Question 13

Which of the following statements correctly describes the reaction of BF3 with NH3 to form F3B-NH3?

Accepted Answer

A) Both nitrogen and boron change from trigonal planar to tetrahedral geometry during the reaction. 
B) Boron changes from trigonal planar to tetrahedral geometry during the reaction. 
C) There are no changes in the formal charge on any atom during the reaction. 
D) Nitrogen changes from trigonal planar to tetrahedral geometry during the reaction. 
E) There is no change in geometry around the nitrogen or boron atoms. 
A) Both nitrogen and boron change from trigonal planar to tetrahedral geometry during the reaction. 
B) Boron changes from trigonal planar to tetrahedral geometry during the reaction. 
C) There are no changes in the formal charge on any atom during the reaction. 
D) Nitrogen changes from trigonal planar to tetrahedral geometry during the reaction. 
E) There is no change in geometry around the nitrogen or boron atoms.

Question 14

The molecular geometry of the nitrite ion,NO2- , is best described as

Accepted Answer

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

Question 15

Which molecule or ion has a trigonal pyramidal molecular geometry?

Accepted Answer

A) H2CO 
B) H2CCO 
C) CH3+ 
D) CH3- 
E) C2H4 
A) H2CO 
B) H2CCO 
C) CH3+ 
D) CH3- 
E) C2H4

Question 16

What is the hybridization of Br in BrF3?

Accepted Answer

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

Question 17

Given the molecular orbital diagram for dinitrogen (N2)excluding the K shells below and assuming all species have a similar ordering of their MO's,which of the following would be expected to be diamagnetic?

Accepted Answer

A) O2 
B) F2− 
C) O22− 
D) B2 
E) Li2+ 
A) O2 
B) F2− 
C) O22− 
D) B2 
E) Li2+

Question 18

Which of the following molecules is nonpolar?

Accepted Answer

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

Question 19

Which of the following statements concerning ozone is incorrect?

Accepted Answer

A) It is generated by passing an electrical discharge through oxygen. 
B) It has a partial double-bond character. 
C) It is a nonpolar molecule. 
D) It is an important absorber of ultraviolet radiation in the stratosphere. 
E) It has a bond angle similar to that predicted for sp2 hybridization. 
A) It is generated by passing an electrical discharge through oxygen. 
B) It has a partial double-bond character. 
C) It is a nonpolar molecule. 
D) It is an important absorber of ultraviolet radiation in the stratosphere. 
E) It has a bond angle similar to that predicted for sp2 hybridization.

Question 20

What is the predicted H-N-H bond angle in the ammonium ion?

Accepted Answer

A) 109.5° 
B) 90° 
C) 180° 
D) 120° 
E) 45° 
A) 109.5° 
B) 90° 
C) 180° 
D) 120° 
E) 45°

Exam 10: Molecular Geometry and Chemical Bonding Theory

For which of the following molecules or ions do the electron pairs on the central nitrogen atom have a tetrahedral arrangement?

Which molecule or ion has the shortest bond distance?

What is the molecular geometry around an atom in a molecule or ion which is surrounded by one lone pair of electrons and three single bonds.

Which molecule or ion is nonlinear?

The molecular geometry of the CH3- ion is

Which of the following molecules has a dipole moment?

What is the hybridization of I in IF4-?

Which molecule or ion has the same molecular geometry for its central atom(s)as BF3?

What hybrid orbitals of sulfur are involved in the bonding in sulfur trioxide?

Which molecule or ion has the same molecular geometry as SeO32-?

Which of the following molecules does not have a permanent dipole moment?

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

Which of the following statements correctly describes the reaction of BF3 with NH3 to form F3B-NH3?

The molecular geometry of the nitrite ion,NO2- , is best described as

Which molecule or ion has a trigonal pyramidal molecular geometry?

What is the hybridization of Br in BrF3?

Given the molecular orbital diagram for dinitrogen (N2)excluding the K shells below and assuming all species have a similar ordering of their MO's,which of the following would be expected to be diamagnetic?

Which of the following molecules is nonpolar?

Which of the following statements concerning ozone is incorrect?

What is the predicted H-N-H bond angle in the ammonium ion?

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

The molecular geometry of the CH₃^- ion is

What is the hybridization of I in IF₄^-?

Which molecule or ion has the same molecular geometry for its central atom(s)as BF₃?

Which molecule or ion has the same molecular geometry as SeO₃^2-?

Which of the following statements correctly describes the reaction of BF₃ with NH₃ to form F₃B-NH₃?

The molecular geometry of the nitrite ion,NO₂^- _, is best described as

What is the hybridization of Br in BrF₃?

Given the molecular orbital diagram for dinitrogen (N₂)excluding the K shells below and assuming all species have a similar ordering of their MO's,which of the following would be expected to be diamagnetic?