Question 1

Which of the following statements about constitutional isomers is true?

Accepted Answer

A)  Constitutional isomers are different molecules having the different molecular formula.
B)  Constitutional isomers are different molecules having the same molecular formula.
C)  Constitutional isomers are same molecules having the different molecular formula.
D)  Constitutional isomers are same molecules having the same molecular formula.E) A) and D)
F) A) and C)

Question 2

Which of the following compounds has an atom with an unfilled valence shell of electrons?

Accepted Answer

A)  H2O
B)  BCl3
C)  CH4
D)  CO2E) C) and D)
F) All of the above

Question 3

Which of the following compounds are non-polar?

Accepted Answer

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

Question 4

Consider compounds which contain both a heteroatom and a double bond.For which compound is no additional Lewis structure possible?
 Consider compounds which contain both a heteroatom and a double bond.For which compound is no additional Lewis structure possible?   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) B) and D)
F) All of the above

Question 5

Which is more important in each pair of contributing resonance structures?

Accepted Answer

A)  II, IV, V
B)  II, III, V
C)  II, III, VI
D)  I, IV, VE) A) and B)
F) A) and C)

Question 6

Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first.  IV > II > III B) II > III > IV > I C) III > IV > II > I D) III > II > IV > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I > IV > II > III
B)  II > III > IV > I
C)  III > IV > II > I
D)  III > II > IV > IE) B) and C)
F) All of the above

Question 7

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene, H2C=CH2?

Accepted Answer

A)  C2p + H1s
B)  Csp + H1s
C)  Csp3 + H1s
D)  Csp2 + H1sE) All of the above
F) None of the above

Question 8

What is the ground-state electronic configuration of a chlorine anion (Cl-) ?

Accepted Answer

A)  1s2, 2s2, 2p6
B)  1s2, 2s2, 2p6, 3s2, 3p6
C)  C. 1s2, 2s2, 2p6, 3s2, 3p5
D)  D. 1s2, 2s2, 2p6, 3s2, 3p4E) A) and D)
F) A) and C)

Question 9

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

Question 10

Which compound contains the most polar bond?

Accepted Answer

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

Question 11

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethylene, H2C=CH2?

Accepted Answer

A)  Csp3 + Csp3, and C2p + C2p
B)  Csp3 + Csp3, and Csp2 + Csp2
C)  C. Csp2 + Csp2, and C2p + C2p
D)  D.Csp2 + Csp2, and Csp2 + Csp2E) B) and C)
F) A) and B)

Question 12

What is the hybridization of the carbon atom in the methyl cation, (CH3+) ?

Accepted Answer

A)  sp3
B)  sp2
C)  sp
D)  pE) A) and B)
F) All of the above

Question 13

Follow the curved arrows to draw the second resonance structure for the ion below.

Accepted Answer

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

Question 14

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 D)
F) A) and C)

Question 15

Which is the correct Lewis structure for acetic acid (CH3CO2H) ?
3CO2H) ?   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) All of the above
F) C) and D)

Question 16

Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde, H2CO.  Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde, H2CO.   A) I > II > III B) I > III > II C) II > I > III D) III > II > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 17

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

Question 18

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

Accepted Answer

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

Question 19

How many different isomers are there for a compound having the molecular formula C3H6O?

Accepted Answer

A)  4
B)  5
C)  6
D)  7E) None of the above
F) A) and D)

Question 20

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

Exam 1: Structure and Bonding

Which is more important in each pair of contributing resonance structures?

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Which of the following compounds are non-polar?

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

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Which of the following statements about constitutional isomers is true?

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

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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 is the correct Lewis structure for acetic acid (CH3CO2H) ?

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Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde, H2CO.

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Follow the curved arrows to draw the second resonance structure for the ion below.

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Consider compounds which contain both a heteroatom and a double bond.For which compound is no additional Lewis structure possible?

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What is the ground-state electronic configuration of a chlorine anion (Cl-) ?

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Which of the following compounds has an atom with an unfilled valence shell of electrons?

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Which compound contains the most polar bond?

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How many different isomers are there for a compound having the molecular formula C3H6O?

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Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene, H2C=CH2?

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Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethylene, H2C=CH2?

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

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Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first.

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What is the hybridization of the carbon atom in the methyl cation, (CH3+) ?

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

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Which is the correct Lewis structure for acetic acid (CH₃CO₂H) ?

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Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde, H₂CO.

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What is the ground-state electronic configuration of a chlorine anion (Cl^-) ?

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How many different isomers are there for a compound having the molecular formula C₃H₆O?

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Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene, H₂C=CH₂?

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Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethylene, H₂C=CH₂?

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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 hybridization of the carbon atom in the methyl cation, (CH₃⁺) ?

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