Question 1

Which of the following is the appropriate conversion of (CH3) 4C to a skeletal structure? 3) 4C to a skeletal 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 D)
F) B) and D)

Question 2

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

Accepted Answer

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

Question 3

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) None of the above
F) All of the above

Question 4

Which of the following pair does not represent resonance structures?

Accepted Answer

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

Question 5

In which of the following ions does carbon have a formal charge?

Accepted Answer

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

Question 6

What is the approximate H-C-O bond angle in formaldehyde,H2CO?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°E) None of the above
F) A) and B)

Question 7

Which of the following statements correctly describes the typical number of bonds for carbon,nitrogen,and oxygen in most neutral organic molecules?

Accepted Answer

A)  Carbon forms 4 covalent bonds,nitrogen forms 2 covalent bonds,and oxygen forms 3 covalent bonds.
B)  Carbon forms 4 covalent bonds,nitrogen forms 3 covalent bonds,and oxygen forms 2 covalent bonds.
C)  Carbon forms 4 covalent bonds,nitrogen forms 5 covalent bonds,and oxygen forms 2 covalent bonds.
D)  Carbon forms 4 covalent bonds,nitrogen forms 5 covalent bonds,and oxygen forms 4 covalent bonds.E) B) and C)
F) None of the above

Question 8

Avobenzone is an active ingredient in some common sunscreens.Which of the following is the correct molecular formula for avobenzone? 22O22O3 B) C20H22O3 C) C21H23O3 D) C20H24O3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  C22O22O3
B)  C20H22O3
C)  C21H23O3
D)  C20H24O3E) B) and D)
F) A) and C)

Question 9

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

Accepted Answer

A)  Csp2 + Csp2
B)  Csp + Csp
C)  Csp3 + Csp3
D)  C2p + C2pE) A) and B)
F) All of the above

Question 10

What is the condensed formula of the compound below?

Accepted Answer

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

Question 11

Which of the following molecules does not have a net dipole moment of zero?

Accepted Answer

A)  CCl4
B)  BF3
C)  CO2
D)  NH3E) A) and B)
F) A) and C)

Question 12

Which of the following molecules has the smallest dipole moment?

Accepted Answer

A)  CO2
B)  HCl
C)  H2O
D)  NH3E) B) and D)
F) A) and B)

Question 13

In which of the following ions does carbon have a formal charge?

Accepted Answer

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

Question 14

What is the hybridization for each of the indicated atoms in the following compound? 2; II = sp2; III = sp2. B) I = sp2; II = sp3; III = sp3. C) I = sp; II = sp2; III = sp3. D) I = sp2; II = sp2; III = sp3." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I = sp2; II = sp2; III = sp2.
B)  I = sp2; II = sp3; III = sp3.
C)  I = sp; II = sp2; III = sp3.
D)  I = sp2; II = sp2; III = sp3.E) A) and C)
F) B) and C)

Question 15

What is the ground-state electronic configuration of a carbon atom?

Accepted Answer

A)  1s2,2s2,2p5
B)  1s2,2s2,2p2
C)  1s2,2s2,2p6
D)  1s2,2s2,2p4E) B) and D)
F) B) and C)

Question 16

What is the approximate C-C-C bond angle in propene,CH3CH = CH2?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°E) All of the above
F) A) and B)

Question 17

How many constitutional isomers are there for a molecule having the molecular formula C3H8O?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and B)
F) None of the above

Question 18

Which of the following statements about bonding is true?

Accepted Answer

A)  Covalent bonds result from the transfer of electrons from one element to another.
B)  Ionic bonds result from the transfer of electrons from a metal to a non-metal.
C)  Ionic bonds result from the sharing of electrons between two non-metals.
D)  Covalent bonds result from the sharing of electrons between two metals.E) None of the above
F) All of the above

Question 19

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

Question 20

In which structure is the hybridization incorrect?

Accepted Answer

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

Exam 1: Structure and Bonding

Which of the following molecules does not have a net dipole moment of zero?

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Which of the following is the appropriate conversion of (CH3) 4C to a skeletal structure?

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

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Which of the following statements about bonding is true?

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What is the ground-state electronic configuration of a carbon atom?

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What is the approximate H-C-O bond angle in formaldehyde,H2CO?

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In which structure is the hybridization incorrect?

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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 of the following statements correctly describes the typical number of bonds for carbon,nitrogen,and oxygen in most neutral organic molecules?

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Which of the following pair does not represent resonance structures?

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How many constitutional isomers are there for a molecule having the molecular formula C3H8O?

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Which of the following molecules has the smallest dipole moment?

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Avobenzone is an active ingredient in some common sunscreens.Which of the following is the correct molecular formula for avobenzone?

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In which of the following ions does carbon have a formal charge?

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What is the approximate C-C-C bond angle in propene,CH3CH = CH2?

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

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What is the condensed formula of the compound below?

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In which of the following ions does carbon have a formal charge?

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What is the hybridization for each of the indicated atoms in the following compound?

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

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Which of the following is the appropriate conversion of (CH₃) ₄C to a skeletal structure?

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

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What is the approximate H-C-O bond angle in formaldehyde,H₂CO?

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

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How many constitutional isomers are there for a molecule having the molecular formula C₃H₈O?

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What is the approximate C-C-C bond angle in propene,CH₃CH = CH₂?

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

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