Question 1

Which one of the following is most likely to be an ionic compound

Accepted Answer

A)  NCl3 
B)  BaCl2 
C)  CO 
D)  SO2 
E)  SF4 
A)  NCl3 
B)  BaCl2 
C)  CO 
D)  SO2 
E)  SF4

Question 2

Which one of the following compounds does not follow the octet rule

Accepted Answer

A)  NF3 
B)  CO2 
C)  CF4 
D)  Br2 
E)  NO 
A)  NF3 
B)  CO2 
C)  CF4 
D)  Br2 
E)  NO

Question 3

The number of resonance structures for the nitrate ion that satisfy the octet rule is

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  None of these 
A)  1 
B)  2 
C)  3 
D)  4 
E)  None of these

Question 4

Use bond energies to estimate the enthalpy change for the reaction of one mole of CH4 with chlorine gas to give CH3Cl and hydrogen chloride.
BE(C-H) = 414 kJ/mol 
BE(C-Cl) = 326 kJ/mol
BE(H-Cl) = 432 kJ/mol
BE(Cl-Cl) = 243 kJ/mol

Accepted Answer

A)  -106 kJ/mol 
B)  -101 kJ/mol 
C)  +101 kJ/mol 
D)  +106 kJ/mol 
E)  +331 kJ/mol 
A)  -106 kJ/mol 
B)  -101 kJ/mol 
C)  +101 kJ/mol 
D)  +106 kJ/mol 
E)  +331 kJ/mol

Question 5

The following Lewis structure depicts the product when boron trifluoride combines with ammonia. How many total valence electrons are shown in this structure

Accepted Answer

A)  28 
B)  30 
C)  32 
D)  34 
E)  None of the above 
A)  28 
B)  30 
C)  32 
D)  34 
E)  None of the above

Question 6

List all types of bonding present in the molecule SO3.
I. ionic bond 
II. polar covalent bond
III. nonpolar covalent bond

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  II and III 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  II and III

Question 7

The Lewis structure reveals a double bond in which of the following molecules

Accepted Answer

A)  Br2 
B)  O2 
C)  N2 
D)  H2 
E)  CH4 
A)  Br2 
B)  O2 
C)  N2 
D)  H2 
E)  CH4

Question 8

How many covalent bonds will be drawn to phosphorous in PO43- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Accepted Answer

A)  4 
B)  5 
C)  6 
D)  7 
E)  8 
A)  4 
B)  5 
C)  6 
D)  7 
E)  8

Question 9

Which one of the following is most likely to be a covalent compound

Accepted Answer

A)  CsOH 
B)  NF3 
C)  Sr(NO3)2 
D)  CaO 
E)  LiF 
A)  CsOH 
B)  NF3 
C)  Sr(NO3)2 
D)  CaO 
E)  LiF

Question 10

The following correctly depicts the Lewis dot symbol for the sulfide ion.

Accepted Answer

A) True 
 B)False

Question 11

Complete this statement: Coulomb's law states that the magnitude of the $\underline{\text{force of interaction}}$ between two charged bodies is

Accepted Answer

A)  directly proportional to the product of the charges on the bodies and directly proportional to the distance separating them. 
B)  directly proportional to the product of the charges on the bodies, and inversely proportional to the square of the distance separating them. 
C)  inversely proportional to the product of the charges on the bodies, and directly proportional to the square of the distance separating them. 
D)  directly proportional to the sum of the charges on the bodies, and inversely proportional to the square of the distance separating them. 
A)  directly proportional to the product of the charges on the bodies and directly proportional to the distance separating them. 
B)  directly proportional to the product of the charges on the bodies, and inversely proportional to the square of the distance separating them. 
C)  inversely proportional to the product of the charges on the bodies, and directly proportional to the square of the distance separating them. 
D)  directly proportional to the sum of the charges on the bodies, and inversely proportional to the square of the distance separating them.

Question 12

Which molecule has a Lewis structure that does not obey the octet rule

Accepted Answer

A)  N2O 
B)  CS2 
C)  PH3 
D)  CCl4 
E)  NO2 
A)  N2O 
B)  CS2 
C)  PH3 
D)  CCl4 
E)  NO2

Question 13

Arrange the following bonds in order of increasing ionic character: 
$B - C$
$C - N$
$C - O$
$C - C$

Accepted Answer

A)  B - C < C - N < C - O < C - C 
B)  C - C < B - C < C - N < C - O 
C)  C - C < C - N < B - C < C - O 
D)  C - O < C - N < B - C < C - C 
E)  C - N < C - C < B - C < C - O 
A)  B - C < C - N < C - O < C - C 
B)  C - C < B - C < C - N < C - O 
C)  C - C < C - N < B - C < C - O 
D)  C - O < C - N < B - C < C - C 
E)  C - N < C - C < B - C < C - O

Question 14

The total number of valence electrons in the molecule P2O5 is

Accepted Answer

A)  11. 
B)  22. 
C)  23. 
D)  40. 
E)  70. 
A)  11. 
B)  22. 
C)  23. 
D)  40. 
E)  70.

Question 15

The following Lewis dot symbol correctly depicts the chloride ion.

Accepted Answer

A) True 
 B)False

Question 16

Each of the three resonance structures of NO3- has how many lone pairs of electrons

Accepted Answer

A)  7 
B)  8 
C)  9 
D)  10 
E)  13 
A)  7 
B)  8 
C)  9 
D)  10 
E)  13

Question 17

The molecule NH2NH2 shows both ionic and covalent bonding.

Accepted Answer

A) True 
 B)False

Question 18

The total number of lone pairs in NCl3 is

Accepted Answer

A)  6. 
B)  8. 
C)  9. 
D)  10. 
E)  13. 
A)  6. 
B)  8. 
C)  9. 
D)  10. 
E)  13.

Question 19

Arrange the following bonds in order of increasing ionic character:
C - F
O - F
H - F

Na - F

Accepted Answer

A)  C - F < O - F < H - F < Na - F 
B)  C - F < H - F < O - F < Na - F 
C)  O - F < C - F < H - F < Na - F 
D)  H - F < C - F < O - F < Na - F 
E)  Na - F < H - F < C - F < O - F 
A)  C - F < O - F < H - F < Na - F 
B)  C - F < H - F < O - F < Na - F 
C)  O - F < C - F < H - F < Na - F 
D)  H - F < C - F < O - F < Na - F 
E)  Na - F < H - F < C - F < O - F

Question 20

Which one of the following ionic solids would have the largest lattice energy

Accepted Answer

A)  NaCl 
B)  NaF 
C)  CaBr2 
D)  CsI 
E)  CaCl2 
A)  NaCl 
B)  NaF 
C)  CaBr2 
D)  CsI 
E)  CaCl2

Exam 9: Chemical Bonding I: Basic Concepts

Which one of the following is most likely to be an ionic compound

Which one of the following compounds does not follow the octet rule

The number of resonance structures for the nitrate ion that satisfy the octet rule is

Use bond energies to estimate the enthalpy change for the reaction of one mole of CH4 with chlorine gas to give CH3Cl and hydrogen chloride. BE(C-H) = 414 kJ/mol BE(C-Cl) = 326 kJ/mol BE(H-Cl) = 432 kJ/mol BE(Cl-Cl) = 243 kJ/mol

The following Lewis structure depicts the product when boron trifluoride combines with ammonia. How many total valence electrons are shown in this structure

List all types of bonding present in the molecule SO3. I. ionic bond II. polar covalent bond III. nonpolar covalent bond

The Lewis structure reveals a double bond in which of the following molecules

How many covalent bonds will be drawn to phosphorous in PO43- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Which one of the following is most likely to be a covalent compound

The following correctly depicts the Lewis dot symbol for the sulfide ion.

Complete this statement: Coulomb's law states that the magnitude of the force of interaction‾\underline{\text{force of interaction}}force of interaction​ between two charged bodies is

Which molecule has a Lewis structure that does not obey the octet rule

Arrange the following bonds in order of increasing ionic character: B−CB - CB−C C−NC - NC−N C−OC - OC−O C−CC - CC−C

The total number of valence electrons in the molecule P2O5 is

The following Lewis dot symbol correctly depicts the chloride ion.

Each of the three resonance structures of NO3- has how many lone pairs of electrons

The molecule NH2NH2 shows both ionic and covalent bonding.

The total number of lone pairs in NCl3 is

Arrange the following bonds in order of increasing ionic character: C - F O - F H - F Na - F

Which one of the following ionic solids would have the largest lattice energy

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 II: Molecular Geometry and Hybridization of Atomic

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

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Use bond energies to estimate the enthalpy change for the reaction of one mole of CH₄ with chlorine gas to give CH₃Cl and hydrogen chloride. BE(C-H) = 414 kJ/mol BE(C-Cl) = 326 kJ/mol BE(H-Cl) = 432 kJ/mol BE(Cl-Cl) = 243 kJ/mol

List all types of bonding present in the molecule SO₃. I. ionic bond II. polar covalent bond III. nonpolar covalent bond

How many covalent bonds will be drawn to phosphorous in PO₄^3- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Complete this statement: Coulomb's law states that the magnitude of the $\underline{\text{force of interaction}}$ between two charged bodies is

Arrange the following bonds in order of increasing ionic character: $B - C$ $C - N$ $C - O$ $C - C$

The total number of valence electrons in the molecule P₂O₅ is

Each of the three resonance structures of NO₃^- has how many lone pairs of electrons

The molecule NH₂NH₂ shows both ionic and covalent bonding.

The total number of lone pairs in NCl₃ is