Question 1

Which of the following molecules is not linear?

Accepted Answer

A)  H2O 
B)  CO2 
C)  HC≡CH 
D)  Cl2 
A)  H2O 
B)  CO2 
C)  HC≡CH 
D)  Cl2

Question 2

What is the approximate value of the length of the C≡C bond in ethyne, HC≡CH?

Accepted Answer

A)  121 pm 
B)  134 pm 
C)  142 pm 
D)  154 pm 
A)  121 pm 
B)  134 pm 
C)  142 pm 
D)  154 pm

Question 3

Which of the following is a secondary (2°) amine?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 4

The following species forms during an organic reaction.   The formal charge on the carbon atom indicated by the arrow is +1.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following molecules has a molecular dipole moment?

Accepted Answer

A)  H2O 
B)  CO2 
C)  HC≡CH 
D)  Cl2 
A)  H2O 
B)  CO2 
C)  HC≡CH 
D)  Cl2

Question 6

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

Accepted Answer

A)  C2p + H1s 
B)  C2sp + H1s 
C)  C2sp2 + H1s 
D)  C2sp3 + H1s 
A)  C2p + H1s 
B)  C2sp + H1s 
C)  C2sp2 + H1s 
D)  C2sp3 + H1s

Question 7

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

Accepted Answer

Question 8

Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO] −?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 9

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

Accepted Answer

A)  90° 
B)  109° 
C)  120° 
D)  180° 
A)  90° 
B)  109° 
C)  120° 
D)  180°

Question 10

Draw bond-line structures of all of the tertiary (3°) alcohols that have the formula C6H14O.

Accepted Answer

Question 11

Which of the following bonds is a polar covalent bond?

Accepted Answer

A)  Na−F 
B)  C−H 
C)  C−O 
D)  Cl−Cl 
A)  Na−F 
B)  C−H 
C)  C−O 
D)  Cl−Cl

Question 12

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 bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Accepted Answer

Question 13

The energy released on the addition of an electron to an atom or a molecule is called _____.

Accepted Answer

A)  electron affinity 
B)  ionization energy 
C)  resonance energy 
D)  delocalization 
A)  electron affinity 
B)  ionization energy 
C)  resonance energy 
D)  delocalization

Question 14

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) 
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)

Question 15

Which of the following molecules has a molecular dipole moment?

Accepted Answer

A)  CO2 
B)  BF3 
C)  NH3 
D)  CH4 
A)  CO2 
B)  BF3 
C)  NH3 
D)  CH4

Question 16

Which atomic orbitals overlap to form the carbon-carbon σ and π bonding molecular orbitals of ethene, H2C=CH2?

Accepted Answer

A)  C2sp3 + C2sp3, and C2p + C2p 
B)  C2sp2 + C2sp2, and C2sp2 + C2sp2 
C)  C2sp2 + C2sp2, and C2p + C2p 
D)  C2sp3 + C2sp3, and C2sp2 + C2sp2 
A)  C2sp3 + C2sp3, and C2p + C2p 
B)  C2sp2 + C2sp2, and C2sp2 + C2sp2 
C)  C2sp2 + C2sp2, and C2p + C2p 
D)  C2sp3 + C2sp3, and C2sp2 + C2sp2

Question 17

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

Accepted Answer

Question 18

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 2sp 
A)  C 2sp3 + O 2sp2 
B)  C 2sp2 + O 2p 
C)  C 2sp2 + O 2sp2 
D)  C 2sp3 + O 2sp

Question 19

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 pm 
A)  121 pm 
B)  134 pm 
C)  142 pm 
D)  154 pm

Question 20

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

Accepted Answer

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

Exam 1: Covalent Bonding and Shapes of Molecules

Which of the following molecules is not linear?

What is the approximate value of the length of the C≡C bond in ethyne, HC≡CH?

Which of the following is a secondary (2°) amine?

The following species forms during an organic reaction. The formal charge on the carbon atom indicated by the arrow is +1.

Which of the following molecules has a molecular dipole moment?

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

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

Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO] −?

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

Draw bond-line structures of all of the tertiary (3°) alcohols that have the formula C6H14O.

Which of the following bonds is a polar covalent bond?

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 bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

The energy released on the addition of an electron to an atom or a molecule is called _____.

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

Which of the following molecules has a molecular dipole moment?

Which atomic orbitals overlap to form the carbon-carbon σ and π bonding molecular orbitals of ethene, H2C=CH2?

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

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

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

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

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

Filters

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

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

Which of the following resonance structures makes the largest contribution to the structure of [H₂CCHO] ⁻?

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

Draw bond-line structures of all of the tertiary (3°) alcohols that have the formula C₆H₁₄O.

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 bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Which atomic orbitals overlap to form the carbon-carbon σ and π bonding molecular orbitals of ethene, H₂C=CH₂?

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

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

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