Question 1

Compound that is nonpolar

Accepted Answer

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

Question 2

In which of the following triatomic molecules or ions are both of the bonds multiple bonds?

Accepted Answer

A)  HCN 
B)  CO2 
C)  NO2- 
D)  more than one correct response 
E)  no correct response 
A)  HCN 
B)  CO2 
C)  NO2- 
D)  more than one correct response 
E)  no correct response B

Question 3

The total number of nonbonding electron pairs present in the Lewis structure of SiH4 is

Accepted Answer

A)  zero 
B)  one 
C)  two 
D)  four 
A)  zero 
B)  one 
C)  two 
D)  four A

Question 4

Characterize the bond that forms between Li (1.0) and O (3.5).

Accepted Answer

A)  polar covalent bond 
B)  nonpolar covalent bond 
C)  coordinate covalent bond 
D)  ionic bond 
A)  polar covalent bond 
B)  nonpolar covalent bond 
C)  coordinate covalent bond 
D)  ionic bond

Question 5

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices provided. (1) An unpaired electron is present in the Lewis structure for the molecule NO.
(2) The molecule nitric oxide is naturally present in the human body.
(3) The acronym OPR stands for odor replication process.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 6

In which of the following pairs of triatomic species do both members of the pair have the same geometry?

Accepted Answer

A)  H2O and H2S 
B)  NO2+ and NO2- 
C)  HCN and FNO 
D)  more than one correct response 
E)  no correct response 
A)  H2O and H2S 
B)  NO2+ and NO2- 
C)  HCN and FNO 
D)  more than one correct response 
E)  no correct response

Question 7

VSEPR theory predicts that the geometry of the AsH3 molecule is

Accepted Answer

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

Question 8

Choose the correct number of shared electrons contributed by oxygen to the coordinate covalent bond in CO.

Accepted Answer

A)  zero 
B)  one 
C)  four 
D)  eight 
A)  zero 
B)  one 
C)  four 
D)  eight

Question 9

A, X, and Z are different elements with different electronegativities. What choice below best describes the polarity of the bonds and molecule in a linear Z-A-X?

Accepted Answer

A)  polar molecule with polar bonds 
B)  polar molecule with both polar and nonpolar bonds 
C)  nonpolar molecule with polar bonds 
D)  nonpolar molecule with nonpolar bonds 
A)  polar molecule with polar bonds 
B)  polar molecule with both polar and nonpolar bonds 
C)  nonpolar molecule with polar bonds 
D)  nonpolar molecule with nonpolar bonds

Question 10

What is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen?

Accepted Answer

A)  linear 
B)  angular 
C)  trigonal planar 
D)  tetrahedral 
A)  linear 
B)  angular 
C)  trigonal planar 
D)  tetrahedral

Question 11

Characterize the bond that forms between Be (1.5) and C (2.5).

Accepted Answer

A)  polar covalent bond 
B)  nonpolar covalent bond 
C)  coordinate covalent bond 
D)  ionic bond 
A)  polar covalent bond 
B)  nonpolar covalent bond 
C)  coordinate covalent bond 
D)  ionic bond

Question 12

An angular geometry is associated with molecules in which the central atom has

Accepted Answer

A)  two bonds and two nonbonding electron groups 
B)  two bonds and one nonbonding electron group 
C)  two bonds and no nonbonding electron groups 
D)  more than one correct response 
E)  no correct response 
A)  two bonds and two nonbonding electron groups 
B)  two bonds and one nonbonding electron group 
C)  two bonds and no nonbonding electron groups 
D)  more than one correct response 
E)  no correct response

Question 13

In which of the following bonds is the bond polarity incorrect?

Accepted Answer

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

Question 14

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices provided. (1) Once a coordinate covalent bond is formed, there is no way to distinguish it from any of the other covalent bonds in a molecule.
(2) The least electronegative elements are located to the far right in the periodic table.
(3) The central concept of VSEPR theory is that the electron groups in the valence shell of a central atom in a molecule attract each other.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 15

Use the following to answer the questions below:
For each of the compounds, select from the response list the correct number of atoms present in a molecule of the compound. Responses on the right may be used more than once or need not be used at all.
a) contains three or fewer atoms
b) contains four atoms
c) contains five atoms
d) contains six or more atoms
-Select the correct number of atoms in one molecule of methane.

Accepted Answer

A)  contains three or fewer atoms 
B)  contains four atoms 
C)  contains five atoms 
D)  contains six or more atoms 
A)  contains three or fewer atoms 
B)  contains four atoms 
C)  contains five atoms 
D)  contains six or more atoms

Question 16

Electronegativity is a concept that is useful along with other concepts in

Accepted Answer

A)  predicting the polarity of a bond 
B)  deciding how many electrons are involved in a bond 
C)  formulating a statement of the octet rule 
D)  determining the charge on a polyatomic ion 
A)  predicting the polarity of a bond 
B)  deciding how many electrons are involved in a bond 
C)  formulating a statement of the octet rule 
D)  determining the charge on a polyatomic ion

Question 17

Coordinate covalent bonds differ from normal covalent bonds in that:

Accepted Answer

A)  One atom supplies more electrons to the bond than the other atom. 
B)  The electrons of the bond move about in a coordinated pattern. 
C)  Atoms involved must always also possess nonbonding electron pairs. 
D)  More than one correct response. 
E)  No correct response. 
A)  One atom supplies more electrons to the bond than the other atom. 
B)  The electrons of the bond move about in a coordinated pattern. 
C)  Atoms involved must always also possess nonbonding electron pairs. 
D)  More than one correct response. 
E)  No correct response.

Question 18

Choose the correct number of electrons in the Lewis structure for NH3.

Accepted Answer

A)  zero 
B)  one 
C)  four 
D)  eight 
A)  zero 
B)  one 
C)  four 
D)  eight

Question 19

Use the following to answer the questions below:
For each of the compounds, select from the response list the correct number of atoms present in a molecule of the compound. Responses on the right may be used more than once or need not be used at all.
a) contains three or fewer atoms
b) contains four atoms
c) contains five atoms
d) contains six or more atoms
-Select the correct number of atoms in one molecule of nitrogen dioxide.

Accepted Answer

A)  contains three or fewer atoms 
B)  contains four atoms 
C)  contains five atoms 
D)  contains six or more atoms 
A)  contains three or fewer atoms 
B)  contains four atoms 
C)  contains five atoms 
D)  contains six or more atoms

Question 20

A and X are different elements with different electronegativities. What choice below best describes the polarity of the bonds and molecule in a linear A-A-X?

Accepted Answer

A)  polar molecule with polar bonds 
B)  polar molecule with both polar and nonpolar bonds 
C)  nonpolar molecule with polar bonds 
D)  nonpolar molecule with nonpolar bonds 
A)  polar molecule with polar bonds 
B)  polar molecule with both polar and nonpolar bonds 
C)  nonpolar molecule with polar bonds 
D)  nonpolar molecule with nonpolar bonds

Exam 5: Chemical Bonding: the Covalent Bond Model

Compound that is nonpolar

In which of the following triatomic molecules or ions are both of the bonds multiple bonds?

The total number of nonbonding electron pairs present in the Lewis structure of SiH4 is

Characterize the bond that forms between Li (1.0) and O (3.5).

In which of the following pairs of triatomic species do both members of the pair have the same geometry?

VSEPR theory predicts that the geometry of the AsH3 molecule is

Choose the correct number of shared electrons contributed by oxygen to the coordinate covalent bond in CO.

A, X, and Z are different elements with different electronegativities. What choice below best describes the polarity of the bonds and molecule in a linear Z-A-X?

What is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen?

Characterize the bond that forms between Be (1.5) and C (2.5).

An angular geometry is associated with molecules in which the central atom has

In which of the following bonds is the bond polarity incorrect?

Electronegativity is a concept that is useful along with other concepts in

Coordinate covalent bonds differ from normal covalent bonds in that:

Choose the correct number of electrons in the Lewis structure for NH3.

A and X are different elements with different electronegativities. What choice below best describes the polarity of the bonds and molecule in a linear A-A-X?

Basic Concepts About Matter

Measurements in Chemistry

Atomic Structure and the Periodic Table

Chemical Bonding: the Ionic Bond Model

Chemical Calculations: Formula Masses, Moles, and Chemical Equations

Gases, Liquids, and Solids

Solutions

Chemical Reactions

Acids, Bases, and Salts

Nuclear Chemistry

Saturated Hydrocarbons

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids, Esters, and Other Acid Derivatives

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes and Vitamins

Nucleic Acids

Biochemical Energy Production

Carbohydrate Metabolism

Lipid Metabolism

Protein Metabolism

Filters

The total number of nonbonding electron pairs present in the Lewis structure of SiH₄ is

VSEPR theory predicts that the geometry of the AsH₃ molecule is

Choose the correct number of electrons in the Lewis structure for NH₃.