Question 1

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

Question 2

When forming molecular orbitals from atomic orbitals, what is the order of increasing C-H bond strength for the following set?
 When forming molecular orbitals from atomic orbitals, what is the order of increasing C-H bond strength for the following set?   A) II

Accepted Answer

A)  II 
B)  III 
C)  III 
D)  I < II < IIIE) C) and D)
F) A) and B)

Question 3

Which of the following Lewis structures is correct?

Accepted Answer

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

Question 4

How many constitutional isomers are there for a molecule having the molecular formula C2H4Cl2?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and B)
F) All of the above

Question 5

Avobenzone is an active ingredient in some common sunscreens.Which of the following is the correct molecular formula for avobenzone?
 Avobenzone is an active ingredient in some common sunscreens.Which of the following is the correct molecular formula for avobenzone?   A) C22O22O3 B) C20H22O3 C) C21H23O3 D) C20H24O3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  C22O22O3
B)  C20H22O3
C)  C21H23O3
D)  C20H24O3E) All of the above
F) B) and D)

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

Question 7

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

Question 8

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

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

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

Question 12

Which of the following molecules has polar covalent bonds?

Accepted Answer

A)  MgO
B)  NH3
C)  Cl2
D)  NaBrE) B) and D)
F) A) and B)

Question 13

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

Question 14

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) A) and B)

Question 15

Which of the following molecules has nonpolar covalent bonds?

Accepted Answer

A)  HCl
B)  N2
C)  CHCl3
D)  NOE) C) and D)
F) B) and C)

Question 16

Which of the following is the appropriate conversion of (CH3) 2CHOCH2CH2CH2OH to a skeletal structure?
3) 2CHOCH2CH2CH2OH 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 B)
F) A) and C)

Question 17

Arrange the following bonds in decreasing order of ionic character, putting the most ionic first.  II > III > IV B) IV > II > I > III C) IV > III > II > I D) IV > II > III > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I > II > III > IV
B)  IV > II > I > III
C)  IV > III > II > I
D)  IV > II > III > IE) A) and B)
F) None of the above

Question 18

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

Question 19

Which of the following statements about resonance structures is not true?

Accepted Answer

A)  There is no movement of electrons from one form to another.
B)  Resonance structures are not isomers.
C)  Resonance structures differ only in the arrangement of electrons.
D)  Resonance structures are in equilibrium with each other.E) B) and D)
F) C) and D) D

Question 20

In which structure is the hybridization incorrect?

Accepted Answer

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

Exam 1: Structure and Bonding

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

Correct AnswerverifiedShow Answer

When forming molecular orbitals from atomic orbitals, what is the order of increasing C-H bond strength for the following set?

Correct AnswerverifiedShow Answer

Which of the following Lewis structures is correct?

Correct AnswerverifiedShow Answer

How many constitutional isomers are there for a molecule having the molecular formula C2H4Cl2?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements about bonding is true?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Determine the geometry around the indicated atom in each species.

Correct AnswerverifiedA

Which of the following molecules has polar covalent bonds?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

Which of the following molecules has nonpolar covalent bonds?

Correct AnswerverifiedShow Answer

Which of the following is the appropriate conversion of (CH3) 2CHOCH2CH2CH2OH to a skeletal structure?

Correct AnswerverifiedShow Answer

Arrange the following bonds in decreasing order of ionic character, putting the most ionic first.

Correct AnswerverifiedShow Answer

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

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Which of the following statements about resonance structures is not true?

Correct AnswerverifiedD

In which structure is the hybridization incorrect?

Correct AnswerverifiedShow Answer

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

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How many constitutional isomers are there for a molecule having the molecular formula C₂H₄Cl₂?

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

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

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

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A

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D

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Which of the following is the appropriate conversion of (CH₃) ₂CHOCH₂CH₂CH₂OH to a skeletal structure?

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D

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