Question 1

Which of these is not a fundamental postulate of Lewis theory?

Accepted Answer

A)  Valence electrons are shared in covalent bonding. 
B)  The valence shell is involved in chemical bonding. 
C)  Atoms bond to achieve a more stable configuration. 
D)  Atoms bond to achieve an octet of electrons in the valence shell. 
E)  Valence electrons are shared between atoms to form ionic bonds. 
A)  Valence electrons are shared in covalent bonding. 
B)  The valence shell is involved in chemical bonding. 
C)  Atoms bond to achieve a more stable configuration. 
D)  Atoms bond to achieve an octet of electrons in the valence shell. 
E)  Valence electrons are shared between atoms to form ionic bonds.

Question 2

Which of these contain polar bonds but are nonpolar molecules?
I. NCl3
II. H2
III. CO2
IV. BF3

Accepted Answer

A)  I and II 
B)  I and III 
C)  III and IV 
D)  II and III 
E)  I, III, and IV 
A)  I and II 
B)  I and III 
C)  III and IV 
D)  II and III 
E)  I, III, and IV

Question 3

An atom with two valence electrons will most likely _____.

Accepted Answer

A)  lose two electrons to become negatively charged and combine with a cation 
B)  lose two electrons to become positively charged and combine with an anion 
C)  gain two electrons to become negatively charged and combine with a cation 
D)  gain two electrons to become positively charged and combine with an anion 
E)  gain two electrons to become positively charged and combine with a cation 
A)  lose two electrons to become negatively charged and combine with a cation 
B)  lose two electrons to become positively charged and combine with an anion 
C)  gain two electrons to become negatively charged and combine with a cation 
D)  gain two electrons to become positively charged and combine with an anion 
E)  gain two electrons to become positively charged and combine with a cation

Question 4

Which of the following molecules is nonpolar?

Accepted Answer

A)  CO2 
B)  N2 
C)  CH4 
D)  CCl4 
E)  All of these 
A)  CO2 
B)  N2 
C)  CH4 
D)  CCl4 
E)  All of these

Question 5

Which of the following are polar molecules?
I. PCl3
II. H2O
III. CO2
IV. BF3

Accepted Answer

A)  I and IV 
B)  I and II 
C)  I, II, and IV 
D)  II and III 
E)  II and IV 
A)  I and IV 
B)  I and II 
C)  I, II, and IV 
D)  II and III 
E)  II and IV

Question 6

Of the bonds below, the most polar bond would be _____.

Accepted Answer

A)  C − C 
B)  C − N 
C)  C − O 
D)  C − F 
E)  B − C 
A)  C − C 
B)  C − N 
C)  C − O 
D)  C − F 
E)  B − C

Question 7

Which of these is the correct Lewis dot structure for nitrogen, N2?

Accepted Answer

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

Question 8

Which of these would be expected to have a trigonal planar electron geometry?
​

Accepted Answer

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

Question 9

Which of these molecules contains a triple bond?

Accepted Answer

A)  PCl3 
B)  N2 
C)  SO2 
D)  H2O 
E)  CO2 
A)  PCl3 
B)  N2 
C)  SO2 
D)  H2O 
E)  CO2

Question 10

How many lone pairs of electrons are present around the central atom in SO2?

Accepted Answer

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

Question 11

List the elements Li, K, Al, Br, and Cs in order of increasing electronegativity (from least to greatest).

Accepted Answer

A)  Li < Cs < Al < K < Br 
B)  Cs < Li < K < Br < Al 
C)  Br < Li < Al < K < Cs 
D)  Br < Al < Li < K < Cs 
E)  Cs < K < Li < Al < Br 
A)  Li < Cs < Al < K < Br 
B)  Cs < Li < K < Br < Al 
C)  Br < Li < Al < K < Cs 
D)  Br < Al < Li < K < Cs 
E)  Cs < K < Li < Al < Br

Question 12

Which of the following results in bent molecular geometry?

Accepted Answer

A)  Four bonding groups and zero lone pair on the central atom 
B)  Two bonding groups and three lone pairs on the central atom 
C)  Two bonding groups and two lone pairs on the central atom 
D)  Two bonding groups and zero lone pair on the central atom 
E)  Three bonding groups and one lone pair on the central atom 
A)  Four bonding groups and zero lone pair on the central atom 
B)  Two bonding groups and three lone pairs on the central atom 
C)  Two bonding groups and two lone pairs on the central atom 
D)  Two bonding groups and zero lone pair on the central atom 
E)  Three bonding groups and one lone pair on the central atom

Question 13

Which of these are polar molecules with a tetrahedral electron geometry?
I. CO2
II. H2O
III. CH3Cl
IV. SiH4

Accepted Answer

A)  I and IV 
B)  I and III 
C)  I, II, and III 
D)  III and IV 
E)  II and III 
A)  I and IV 
B)  I and III 
C)  I, II, and III 
D)  III and IV 
E)  II and III

Question 14

Which of these molecules contains one double bond and one single bond?

Accepted Answer

A)  PCl3 
B)  NH3 
C)  SO2 
D)  H2O 
E)  CO2 
A)  PCl3 
B)  NH3 
C)  SO2 
D)  H2O 
E)  CO2

Question 15

Which of the following is true about ozone?

Accepted Answer

A)  Its Lewis structure is best represented by resonance structures. 
B)  It increases the amount of ultraviolet radiation reaching the Earth's surface. 
C)  It cannot be broken down by ultraviolet radiation. 
D)  Its chemical formula is O2. 
E)  It contains triple bonds between oxygen atoms. 
A)  Its Lewis structure is best represented by resonance structures. 
B)  It increases the amount of ultraviolet radiation reaching the Earth's surface. 
C)  It cannot be broken down by ultraviolet radiation. 
D)  Its chemical formula is O2. 
E)  It contains triple bonds between oxygen atoms.

Question 16

Which of the following molecular geometries can a molecule with a tetrahedral electron geometry possess?

Accepted Answer

A)  Tetrahedral 
B)  Trigonal pyramidal 
C)  Bent 
D)  All of these 
E)  None of these 
A)  Tetrahedral 
B)  Trigonal pyramidal 
C)  Bent 
D)  All of these 
E)  None of these

Question 17

Which of these molecules will have a tetrahedral electron geometry and a trigonal pyramidal molecular geometry?

Accepted Answer

A)  NH  3  
B)  H2O 
C)  C2H2 
D)  CH3Cl 
E)  SO2 
A)  NH  3  
B)  H2O 
C)  C2H2 
D)  CH3Cl 
E)  SO2

Question 18

Which of these is a nonpolar molecule?

Accepted Answer

A)  CO 
B)  H2O 
C)  O3 
D)  PCl3 
E)  SO3 
A)  CO 
B)  H2O 
C)  O3 
D)  PCl3 
E)  SO3

Question 19

Which of these is the most likely identity of element A in the Lewis dot structure?
​

Accepted Answer

A)  Ca 
B)  Li 
C)  Al 
D)  Cs 
E)  P 
A)  Ca 
B)  Li 
C)  Al 
D)  Cs 
E)  P

Question 20

Which of these molecules contains two double bonds?

Accepted Answer

A)  PCl3 
B)  N2 
C)  SO2 
D)  H2O 
E)  CO2 
A)  PCl3 
B)  N2 
C)  SO2 
D)  H2O 
E)  CO2

Which of these is not a fundamental postulate of Lewis theory?

Which of these contain polar bonds but are nonpolar molecules? I. NCl₃ II. H₂ III. CO₂ IV. BF₃

An atom with two valence electrons will most likely _____.

Which of the following molecules is nonpolar?

Which of the following are polar molecules? I. PCl₃ II. H₂O III. CO₂ IV. BF₃

Of the bonds below, the most polar bond would be _____.

Which of these is the correct Lewis dot structure for nitrogen, N₂?

Which of these would be expected to have a trigonal planar electron geometry?

Which of these molecules contains a triple bond?

How many lone pairs of electrons are present around the central atom in SO₂?

List the elements Li, K, Al, Br, and Cs in order of increasing electronegativity (from least to greatest).

Which of the following results in bent molecular geometry?

Which of these are polar molecules with a tetrahedral electron geometry? I. CO₂ II. H₂O III. CH₃Cl IV. SiH₄

Which of these molecules contains one double bond and one single bond?

Which of the following is true about ozone?

Which of the following molecular geometries can a molecule with a tetrahedral electron geometry possess?

Which of these molecules will have a tetrahedral electron geometry and a trigonal pyramidal molecular geometry?

Which of these is a nonpolar molecule?

Which of these is the most likely identity of element A in the Lewis dot structure?

Which of these molecules contains two double bonds?

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Exam 5: Chemical Bonding

Which of these is not a fundamental postulate of Lewis theory?

Which of these contain polar bonds but are nonpolar molecules? I. NCl3 II. H2 III. CO2 IV. BF3

An atom with two valence electrons will most likely _____.

Which of the following molecules is nonpolar?

Which of the following are polar molecules? I. PCl3 II. H2O III. CO2 IV. BF3

Of the bonds below, the most polar bond would be _____.

Which of these is the correct Lewis dot structure for nitrogen, N2?

Which of these would be expected to have a trigonal planar electron geometry? ​

Which of these molecules contains a triple bond?

How many lone pairs of electrons are present around the central atom in SO2?

List the elements Li, K, Al, Br, and Cs in order of increasing electronegativity (from least to greatest).

Which of the following results in bent molecular geometry?

Which of these are polar molecules with a tetrahedral electron geometry? I. CO2 II. H2O III. CH3Cl IV. SiH4

Which of these molecules contains one double bond and one single bond?

Which of the following is true about ozone?

Which of the following molecular geometries can a molecule with a tetrahedral electron geometry possess?

Which of these molecules will have a tetrahedral electron geometry and a trigonal pyramidal molecular geometry?

Which of these is a nonpolar molecule?

Which of these is the most likely identity of element A in the Lewis dot structure? ​

Which of these molecules contains two double bonds?

Molecular Reasons

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Molecules, Compounds, and Chemical Reactions

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The Liquids and Solids Around Us: Especially Water

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Which of these contain polar bonds but are nonpolar molecules? I. NCl₃ II. H₂ III. CO₂ IV. BF₃

Which of the following are polar molecules? I. PCl₃ II. H₂O III. CO₂ IV. BF₃

Which of these is the correct Lewis dot structure for nitrogen, N₂?

Which of these would be expected to have a trigonal planar electron geometry?

How many lone pairs of electrons are present around the central atom in SO₂?

Which of these are polar molecules with a tetrahedral electron geometry? I. CO₂ II. H₂O III. CH₃Cl IV. SiH₄

Which of these is the most likely identity of element A in the Lewis dot structure?