Question 1

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) A) and C)
F) All of the above

Question 2

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) A) and D)

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

A)  CO2
B)  H2S
C)  NH3
D)  H2OE) C) and D)
F) All of the above

Question 5

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 B)
F) A) and C)

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

A)  6
B)  8
C)  10
D)  12E) B) and C)
F) A) and C)

Question 8

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) A) and C)

Question 9

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

Accepted Answer

A)  CO2
B)  N2
C)  CCl4
D)  HFE) A) and B)
F) B) and C)

Question 10

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) B) and C)
F) A) and B)

Question 11

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) C) and D)
F) B) and D)

Question 12

In which structure is the hybridization incorrect?

Accepted Answer

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

Question 13

Which of the following pair does not represent resonance structures?

Accepted Answer

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

Question 14

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 B)
F) None of the above

Question 15

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

Accepted Answer

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

Question 16

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) A) and C)

Question 17

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

Accepted Answer

A)  Tetrahedral
B)  Trigonal Planar
C)  Trigonal Pyramidal
D)  LinearE) A) and C)
F) None of the above

Question 18

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) None of the above
F) A) and B)

Question 19

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) B) and C)
F) B) and D)

Question 20

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

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) A) and D)
F) None of the above

Exam 1: Structure and Bonding

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

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

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Which of the following pair does not represent resonance structures?

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Which of the following molecules are constitutional isomers?

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

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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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In which structure is the hybridization incorrect?

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

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

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

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

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

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

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

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

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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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Determine the geometry around the indicated atom in each species.

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

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

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

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

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

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

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

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

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