Question 1

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

Accepted Answer

A)  All resonance structures must have the same number of electrons
B)  Each atom in all of the resonance structures must have a complete shell of valence electrons
C)  All resonance structures must have the same arrangement of atoms
D)  All resonance structures must be valid Lewis structuresE) A) and D)
F) A) and B)

Question 2

Which of the following compounds is a ketone?

Accepted Answer

A)  CH3CH2COOH
B)  CH3CH2CHO
C)  CH3CH2CH2OH
D)  CH3COCH3E) A) and C)
F) B) and D)

Question 3

The curved arrows in the resonance structure for the acetate ion shown below  indicate the following alternative resonance structure for the acetate ion.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is a primary (1 ∘\circ∘ )  alcohol?  \circ )  alcohol?   A) 1 B) 2 C) 3 D) 4 " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 5

Which of the following species possesses a formal charge?

Accepted Answer

A)  CCl4
B)  SiCl4
C)  AlCl4
D)  PCl3E) All of the above
F) A) and D)

Question 6

Which of the following elements has the highest electronegativity?

Accepted Answer

A)  C
B)  P
C)  Si
D)  ClE) B) and D)
F) B) and C)

Question 7

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H2C=CH2). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Accepted Answer

Question 8

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC$\equiv$CH). Label each bond (e.g., C-H $\sigma$bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Accepted Answer

Question 9

What is the approximate value of the length of the C=C bond in ethane, CH2=CH2?

Accepted Answer

A)  121 pm
B)  134 pm
C)  142 pm
D)  154 pmE) C) and D)
F) None of the above

Question 10

Which atomic orbitals overlap to form the C=O bond of acetone, (CH3) 2C=O?

Accepted Answer

A)  C 2sp3 + O 2sp2
B)  C 2sp2 + O 2p
C)  C 2sp2 + O 2sp2
D)  C 2sp3 + O 2spE) B) and C)
F) A) and D)

Question 11

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

Accepted Answer

A)  Each resonance structure is in rapid equilibrium with all of the other structures
B)  The resonance structures may have different energies
C)  All resonance structures must have the same arrangement of atoms
D)  All resonance structures must have the same number of electronsE) B) and C)
F) All of the above

Question 12

Which of the following statements is not true about the carbonate anion, CO32-?

Accepted Answer

A)  All of the oxygen atoms bear the same amount of charge
B)  All of the carbon-oxygen bonds are the same length
C)  The carbon atom bears the negative charge
D)  It is basicE) A) and C)
F) A) and D)

Question 13

What is the approximate C-C-C bond angle in propyne, HC ≡\equiv≡ CCH3?

Accepted Answer

A)  90 ∘\circ∘ 
B)  109 ∘\circ∘ 
C)  120 ∘\circ∘ 
D)  180 ∘\circ∘  E) B) and D)
F) B) and C)

Question 14

Which of the following bonds has the smallest dipole moment?

Accepted Answer

A)  C-N
B)  C-O
C)  C-F
D)  O-HE) A) and D)
F) B) and C)

Question 15

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp3 and Carbon 2 sp2.

Accepted Answer

A) True 
 B)False

Question 16

How many electrons are there in the valence shell of the carbon atom of a methyl cation, CH3+?

Accepted Answer

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

Question 17

Which of the following is an carboxylic ester?

Accepted Answer

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

Question 18

Which atomic orbitals overlap to form the carbon-carbon  σ\sigmaσ  molecular bonding orbital of ethyne, HC ≡\equiv≡ CH?

Accepted Answer

A)  C2p + C2p
B)  C2sp + C2sp
C)  C2sp2 + C2sp2
D)  C2sp3 + C2sp3 E) B) and D)
F) C) and D)

Question 19

Which of the following bonds is the most polar?

Accepted Answer

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

Question 20

Draw bond-line structures of all of the aldehydes that have the formula C5H10O.

Accepted Answer

Exam 1: Covalent Bonding and Shapes of Molecules

Which of the following bonds is the most polar?

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Which of the following compounds is a ketone?

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Which atomic orbitals overlap to form the carbon-carbon σ\sigmaσ molecular bonding orbital of ethyne, HC ≡\equiv≡ CH?

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Draw bond-line structures of all of the aldehydes that have the formula C5H10O.

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Which of the following is a primary (1 ∘\circ∘ ) alcohol?

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Which of the following is an carboxylic ester?

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How many electrons are there in the valence shell of the carbon atom of a methyl cation, CH3+?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H2C=CH2). Label each bond (e.g., C-H σ\sigmaσ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

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

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

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Which atomic orbitals overlap to form the C=O bond of acetone, (CH3) 2C=O?

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Which of the following species possesses a formal charge?

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The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp3 and Carbon 2 sp2.

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Which of the following elements has the highest electronegativity?

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What is the approximate value of the length of the C=C bond in ethane, CH2=CH2?

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Which of the following statements is not true about the carbonate anion, CO32-?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC ≡\equiv≡ CH). Label each bond (e.g., C-H σ\sigmaσ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

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What is the approximate C-C-C bond angle in propyne, HC ≡\equiv≡ CCH3?

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The curved arrows in the resonance structure for the acetate ion shown below indicate the following alternative resonance structure for the acetate ion.

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Which of the following bonds has the smallest dipole moment?

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Which atomic orbitals overlap to form the carbon-carbon $\sigma$ molecular bonding orbital of ethyne, HC $\equiv$ CH?

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Draw bond-line structures of all of the aldehydes that have the formula C₅H₁₀O.

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Which of the following is a primary (1^$\circ$) alcohol? $Which of the following is a primary (1<sup> \circ </sup>) alcohol? A) 1 B) 2 C) 3 D) 4$

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How many electrons are there in the valence shell of the carbon atom of a methyl cation, CH₃⁺?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

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Which atomic orbitals overlap to form the C=O bond of acetone, (CH₃) ₂C=O?

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The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp³ and Carbon 2 sp².

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What is the approximate value of the length of the C=C bond in ethane, CH₂=CH₂?

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Which of the following statements is not true about the carbonate anion, CO₃²^-?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC $\equiv$ CH). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Correct Answer
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What is the approximate C-C-C bond angle in propyne, HC $\equiv$ CCH₃?

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