Question 1

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 + C2p

Question 2

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)  1s2,2s2,2p4

Question 3

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)  C20H24O3

Question 4

What is the condensed formula of the compound below?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV

Question 5

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

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°

Question 6

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.

Question 7

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

Accepted Answer

A)  CCl4
B)  BF3
C)  CO2
D)  NH3

Question 8

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

Accepted Answer

A)  I
B)  II
C)  III
D)  None of these

Question 9

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.

Question 10

Which of the following molecules has the smallest dipole moment?

Accepted Answer

A)  CO2
B)  HCl
C)  H2O
D)  NH3

Question 11

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.

Question 12

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

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°

Question 13

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)  IV

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

A)  I
B)  II
C)  III
D)  None of these

Question 16

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°

Question 17

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 + H1s

Question 18

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

Accepted Answer

A)  I
B)  II
C)  III
D)  IV

Question 19

In which structure is the hybridization incorrect?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV

Question 20

Which of the following pair does not represent resonance structures?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV

Exam 1: Structure and Bonding

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

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

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

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

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

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Which of the following molecules has the smallest dipole moment?

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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 pair does not represent resonance structures?

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

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

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

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What is the condensed formula of the compound below?

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

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

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In which structure is the hybridization incorrect?

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Which of the following statements about bonding is true?

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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 carbon-carbon s bonding molecular orbital 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 of the following is the appropriate conversion of (CH₃) ₄C to a skeletal structure?

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

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

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

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