Question 1

Which of the following would most likely form an ionic bond?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) All of the above
F) A) and C)

Question 2

Which of the following pair does not represent resonance structures?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) B) and D)
F) A) and B)

Question 3

What is the hybridization of the nitrogen atom in the ammonium cation,NH4+?

Accepted Answer

A)  sp3
B)  sp2
C)  sp
D)  pE) A) and D)
F) B) and C)

Question 4

What is the molecular geometry around the boron atom in BH3?

Accepted Answer

A)  Tetrahedral
B)  Trigonal Planar
C)  Trigonal Pyramidal
D)  LinearE) B) and C)
F) B) and D)

Question 5

Which molecule has the greatest difference in electronegativity (DE) between the two different elements?

Accepted Answer

A)  CO2
B)  H2S
C)  NH3
D)  H2OE) None of the above
F) All of the above

Question 6

What is the approximate value of the H-C-H bond angle in methane,CH4?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°E) C) and D)
F) A) and C)

Question 7

How many electrons are around phosphorus in phosphoric acid (H3PO4) ?

Accepted Answer

A)  6
B)  8
C)  10
D)  12E) None of the above
F) A) and C)

Question 8

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethane,CH3CH3?

Accepted Answer

A)  Csp2 + H1s
B)  Csp3 + H1s
C)  C2p + H1s
D)  Csp + H1sE) A) and D)
F) All of the above

Question 9

Determine the geometry around the indicated atom in each species.

Accepted Answer

A)  I = Linear; II = tetrahedral; III = trigonal planar; IV = tetrahedral
B)  I = Linear; II = tetrahedral; III = trigonal planar; IV = linear
C)  I = Trigonal planar; II = linear; III = tetrahedral; IV = trigonal planar
D)  I = Tetrahedral; II = trigonal planar; III = linear; IV = tetrahedralE) All of the above
F) None of the above

Question 10

How many constitutional isomers are there for a molecule having the molecular formula C2H6O?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and D)
F) B) and C)

Question 11

In which structure is the hybridization incorrect?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) A) and D)
F) All of the above

Question 12

Which of the following is a resonance structure of the compound below?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) B) and D)
F) B) and C)

Question 13

Which of the following molecules are constitutional isomers?

Accepted Answer

A)  I,II,IV
B)  II,III,IV
C)  I,III,IV
D)  I,II,IIIE) B) and C)
F) C) and D)

Question 14

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of acetylene,C2H2?

Accepted Answer

A)  Csp + H1s
B)  C2p +H1s
C)  Csp3 + H1s
D)  Csp2 + H1sE) A) and B)
F) A) and C)

Question 15

Which of the following molecules has non-polar covalent bonds?

Accepted Answer

A)  CO2
B)  N2
C)  CCl4
D)  HFE) B) and D)
F) None of the above

Question 16

When forming molecular orbitals from atomic orbitals,what is the order of increasing C-H bond strength for the following set?

Accepted Answer

A)  II 
B)  III 
C)  III 
D)  I < II < IIIE) All of the above
F) C) and D)

Question 17

What is the approximate bond angle for the C-C-N bond in acetonitrile,CH3CN?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°E) A) and B)
F) A) and D)

Question 18

Which of the following molecules contain both covalent and ionic bonds?

Accepted Answer

A)  I,II
B)  I,IV
C)  II,III
D)  II,IVE) A) and D)
F) B) and C)

Question 19

Which of the following is the appropriate conversion of the condensed structure,CH3COCH3,to a Lewis structure? 3COCH3,to a Lewis structure?   A) I B) II C) III D) IV" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) A) and B)
F) All of the above

Question 20

What is the order of decreasing bond length for a C-C bond composed of the following molecular orbitals?  III > II B) I > II > III C) III > II > I D) II > III > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I > III > II
B)  I > II > III
C)  III > II > I
D)  II > III > IE) A) and B)
F) C) and D)

Exam 1: Structure and Bonding

Determine the geometry around the indicated atom in each species.

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How many electrons are around phosphorus in phosphoric acid (H3PO4) ?

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Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethane,CH3CH3?

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Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of acetylene,C2H2?

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What is the approximate bond angle for the C-C-N bond in acetonitrile,CH3CN?

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Which molecule has the greatest difference in electronegativity (DE) between the two different elements?

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What is the hybridization of the nitrogen atom in the ammonium cation,NH4+?

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Which of the following molecules are constitutional isomers?

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Which of the following pair does not represent resonance structures?

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Which of the following is a resonance structure of the compound below?

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How many constitutional isomers are there for a molecule having the molecular formula C2H6O?

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Which of the following is the appropriate conversion of the condensed structure,CH3COCH3,to a Lewis structure?

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What is the molecular geometry around the boron atom in BH3?

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When forming molecular orbitals from atomic orbitals,what is the order of increasing C-H bond strength for the following set?

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What is the order of decreasing bond length for a C-C bond composed of the following molecular orbitals?

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In which structure is the hybridization incorrect?

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Which of the following would most likely form an ionic bond?

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Which of the following molecules contain both covalent and ionic bonds?

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Which of the following molecules has non-polar covalent bonds?

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What is the approximate value of the H-C-H bond angle in methane,CH4?

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How many electrons are around phosphorus in phosphoric acid (H₃PO₄) ?

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Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethane,CH₃CH₃?

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Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of acetylene,C₂H₂?

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What is the approximate bond angle for the C-C-N bond in acetonitrile,CH₃CN?

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What is the hybridization of the nitrogen atom in the ammonium cation,NH₄⁺?

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How many constitutional isomers are there for a molecule having the molecular formula C₂H₆O?

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Which of the following is the appropriate conversion of the condensed structure,CH₃COCH₃,to a Lewis structure?

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What is the molecular geometry around the boron atom in BH₃?

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What is the approximate value of the H-C-H bond angle in methane,CH₄?

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