Question 1

Which of the following bonds is the most polar?

Accepted Answer

A)  F-F
B)  H-F
C)  C-H
D)  C-SiE) B) and D)
F) B) and C)

Question 2

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

Accepted Answer

A)  C2p + H1s
B)  C2sp + H1s
C)  C2sp2 + H1s
D)  C2sp3 + H1s E) A) and D)
F) All of the above

Question 3

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Accepted Answer

Question 4

Which of the following is a tertiary (3 ∘\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 C)
F) None of the above

Question 5

Which of the following best represents the shape of a 2p atomic orbital of carbon?

Accepted Answer

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

Question 6

Which of the following molecules has a molecular dipole moment?

Accepted Answer

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

Question 7

Which of the following elements has the highest electronegativity?

Accepted Answer

A)  N
B)  C
C)  O
D)  SE) B) and C)
F) None of the above

Question 8

Draw bond-line structures of all of the primary (1$\circ$) alcohols that have the formula C5H12O.

Accepted Answer

Question 9

Draw bond-line structures of all of the alcohols that have the formula C4H10O.

Accepted Answer

Question 10

Circle all of the sp hybridized atoms in the following molecular structure.

Accepted Answer

The answer of Circle all of the sp hybridized atoms...

Question 11

The maximum number of electrons that a molecular orbital can contain is four.

Accepted Answer

A) True 
 B)False

Question 12

What is the approximate strength of the C-C bond of ethane?

Accepted Answer

A)  376 kJ/mol (90 kcal./mol) 
B)  422 kJ/mol (101 kcal./mol) 
C)  556 kJ/mol (133 kcal./mol) 
D)  727 kJ/mol (174 kcal./mol) E) B) and D)
F) B) and C)

Question 13

The following two structural formulas represent isomers.

Accepted Answer

A) True 
 B)False

Question 14

The most electronegative elements in the periodic table are generally found toward the right in a horizontal row and toward the top in a column.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following statements is not true about the acetate anion, CH3CO2-?

Accepted Answer

A)  The oxygen atoms bear the same amount of charge
B)  The two carbon-oxygen bonds are the same length
C)  The carbon atom bears the negative charge
D)  It is basicE) B) and D)
F) None of the above

Question 16

What is the ground-state electronic configuration of a sodium cation (sodium: atomic number 11) ?

Accepted Answer

A)  1s22s22p63s1
B)  1s22s22p53s1
C)  1s22s22p6
D)  1s22s22p63s2E) A) and C)
F) A) and B)

Question 17

The following molecules all contain the same functional group except 2.
CH3OH
CH3OCH3
CH3CH2OH
CH3CH(OH)CH3
1
2
3
4

Accepted Answer

A) True 
 B)False

Question 18

Which atomic orbitals overlap to form the carbon-hydrogen  σ\sigmaσ  bonding molecular orbitals of ethane, CH3CH3?

Accepted Answer

A)  C2p + H1s
B)  C2sp + H1s
C)  C2sp2 + H1s
D)  C2sp3 + H1s E) A) and C)
F) B) and C)

Question 19

What is the ground-state electronic configuration of a fluorine atom (fluorine: atomic number 9) ?

Accepted Answer

A)  1s12s12p7
B)  1s22s22p5
C)  1s22s22p6
D)  1s02s22p7E) A) and C)
F) A) and D)

Question 20

Rank the following in order of decreasing importance as a contributing resonance structure to the molecular structure of acetone, CH3COCH3 (more important > less important)  3COCH3 (more important > less important)    A) 1 > 2 > 3 B) 1 > 3 > 2 C) 2 > 1 > 3 D) 3 > 1 > 2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Exam 1: Covalent Bonding and Shapes of Molecules

Circle all of the sp hybridized atoms in the following molecular structure.

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The following molecules all contain the same functional group except 2. CH3OH CH3OCH3 CH3CH2OH CH3CH(OH)CH3 1 2 3 4

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Which of the following statements is not true about the acetate anion, CH3CO2-?

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Which of the following elements has the highest electronegativity?

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What is the approximate strength of the C-C bond of ethane?

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Which atomic orbitals overlap to form the carbon-hydrogen σ\sigmaσ bonding molecular orbitals of ethane, CH3CH3?

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The following two structural formulas represent isomers.

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

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Which of the following molecules has a molecular dipole moment?

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Draw bond-line structures of all of the primary (1 ∘\circ∘ ) alcohols that have the formula C5H12O.

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What is the ground-state electronic configuration of a fluorine atom (fluorine: atomic number 9) ?

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The maximum number of electrons that a molecular orbital can contain is four.

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

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Which of the following is a tertiary (3 ∘\circ∘ ) alcohol?

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What is the ground-state electronic configuration of a sodium cation (sodium: atomic number 11) ?

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Draw bond-line structures of all of the alcohols that have the formula C4H10O.

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Which of the following bonds is the most polar?

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The most electronegative elements in the periodic table are generally found toward the right in a horizontal row and toward the top in a column.

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Which of the following best represents the shape of a 2p atomic orbital of carbon?

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Rank the following in order of decreasing importance as a contributing resonance structure to the molecular structure of acetone, CH3COCH3 (more important > less important)

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The following molecules all contain the same functional group except 2. CH₃OH CH₃OCH₃ CH₃CH₂OH CH₃CH(OH)CH₃ 1 2 3 4

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Which of the following statements is not true about the acetate anion, CH₃CO₂^-?

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Which atomic orbitals overlap to form the carbon-hydrogen $\sigma$ bonding molecular orbitals of ethane, CH₃CH₃?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

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Draw bond-line structures of all of the primary (1^$\circ$) alcohols that have the formula C₅H₁₂O.

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

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

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Draw bond-line structures of all of the alcohols that have the formula C₄H₁₀O.

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Rank the following in order of decreasing importance as a contributing resonance structure to the molecular structure of acetone, CH₃COCH₃ (more important > less important)

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