Question 1

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

Question 2

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

Accepted Answer

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

Question 3

Which of the following Lewis structures is correct?

Accepted Answer

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

Question 4

Which of the following resonance structures is the least important contributor to the resonance hybrid of the formate anion,HCOO-? -?   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) None of the above
F) B) and C) B

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

Question 6

How many constitutional isomers are there for a molecule having the molecular formula C3H6?

Accepted Answer

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

Question 7

Which of the following molecules has a net dipole moment of zero?

Accepted Answer

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

Question 8

Which of the following compounds has an atom with more than eight valence electrons?

Accepted Answer

A)  H2CO3
B)  H2SO4
C)  H2O
D)  HBrE) A) and D)
F) A) and B)

Question 9

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

Accepted Answer

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

Question 10

What is the formal charge of carbon in carbon monoxide (CO) when drawn with a triple bond?

Accepted Answer

A)  0
B)  -2
C)  -1
D)  +1E) A) and C)
F) A) and B)

Question 11

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) C) and D)

Question 12

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) C) and D) B

Question 13

Which of the following covalent bonds has the largest dipole moment?

Accepted Answer

A)  C-H
B)  C-C
C)  C-O
D)  H-FE) B) and D)
F) C) and D)

Question 14

What 2 things will change between two resonance structures?

Accepted Answer

A)  The position of multiple bonds and non-bonded electrons.
B)  The position of multiple bonds and single bonds.
C)  The placement of atoms and single bonds.
D)  The placement of atoms and non-bonded electrons.E) A) and D)
F) A) and C)

Question 15

Which of the following is the appropriate conversion of (CH3) 2CHCH2CHClCH3 to a skeletal structure? 3) 2CHCH2CHClCH3 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) B) and D)
F) A) and B)

Question 16

Which is not an acceptable Lewis structure for the anion CH2NCO-? 2NCO-?   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 ground-state electronic configuration of a magnesium cation (Mg2+) ?

Accepted Answer

A)  1s2,2s2,2p6
B)  1s2,2s2,2p6,3s1
C)  1s2,2s2,2p6,3s2
D)  1s2,2s2,2p6,3s2,3p2E) A) and D)
F) A) and C)

Question 18

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 D)
F) A) and C)

Question 19

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

Question 20

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

Accepted Answer

A)  1s2,2s2,2p2
B)  1s2,2s2,2p3
C)  1s2,2s2,2p4
D)  1s2,2s2,2p5E) All of the above
F) A) and B)

Exam 1: Structure and Bonding

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

Which of the following Lewis structures is correct?

Correct AnswerverifiedShow Answer

Which of the following resonance structures is the least important contributor to the resonance hybrid of the formate anion,HCOO-?

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

How many constitutional isomers are there for a molecule having the molecular formula C3H6?

Correct AnswerverifiedShow Answer

Which of the following molecules has a net dipole moment of zero?

Correct AnswerverifiedShow Answer

Which of the following compounds has an atom with more than eight valence electrons?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the formal charge of carbon in carbon monoxide (CO) when drawn with a triple bond?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

Which of the following covalent bonds has the largest dipole moment?

Correct AnswerverifiedShow Answer

What 2 things will change between two resonance structures?

Correct AnswerverifiedShow Answer

Which of the following is the appropriate conversion of (CH3) 2CHCH2CHClCH3 to a skeletal structure?

Correct AnswerverifiedShow Answer

Which is not an acceptable Lewis structure for the anion CH2NCO-?

Correct AnswerverifiedShow Answer

What is the ground-state electronic configuration of a magnesium cation (Mg2+) ?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following molecules are constitutional isomers?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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C

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Which of the following resonance structures is the least important contributor to the resonance hybrid of the formate anion,HCOO^-?

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B

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How many constitutional isomers are there for a molecule having the molecular formula C₃H₆?

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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 molecular geometry around the boron atom in BH₃?

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B

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Which of the following is the appropriate conversion of (CH₃) ₂CHCH₂CHClCH₃ to a skeletal structure?

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Which is not an acceptable Lewis structure for the anion CH₂NCO^-?

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What is the ground-state electronic configuration of a magnesium cation (Mg²⁺) ?

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