Question 1

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) +1 
A) 0 
B) -2 
C) -1 
D) +1

Question 2

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

Accepted Answer

A) Csp2 + Csp2 
B) Csp + Csp 
C) Csp3 + Csp3 
D) C2p + C2p 
A) Csp2 + Csp2 
B) Csp + Csp 
C) Csp3 + Csp3 
D) C2p + C2p

Question 3

What is the hybridization for each of the indicated atoms in the following compound?

Accepted Answer

A) I = sp2; II = sp2; III = sp2. 
B) I = sp2; II = sp3; III = sp3. 
C) I = sp; II = sp2; III = sp3. 
D) I = sp2; II = sp2; III = sp3. 
A) I = sp2; II = sp2; III = sp2. 
B) I = sp2; II = sp3; III = sp3. 
C) I = sp; II = sp2; III = sp3. 
D) I = sp2; II = sp2; III = sp3.

Question 4

What is the approximate bond angle for the C-C-N bond in acetonitrile, CH3CN?

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
A) 90° 
B) 109.5° 
C) 120° 
D) 180°

Question 5

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

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 6

What is the condensed formula of the compound below?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 7

Which of the following Lewis structures is correct?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 8

How many constitutional isomers are there for a molecule having the molecular formula C3H8O?

Accepted Answer

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

Question 9

Which of the following pair does not represent resonance structures?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 10

What is the hybridization of the nitrogen atom in the ammonium cation, NH4+?

Accepted Answer

A) sp3 
B) sp2 
C) sp 
D) p 
A) sp3 
B) sp2 
C) sp 
D) p

Question 11

Which of the following molecules has non-polar covalent bonds?

Accepted Answer

A) CO2 
B) N2 
C) CCl4 
D) HF 
A) CO2 
B) N2 
C) CCl4 
D) HF

Question 12

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° 
A) 90° 
B) 109.5° 
C) 120° 
D) 180°

Question 13

How many constitutional isomers are there for a molecule having the molecular formula C2H6O?

Accepted Answer

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

Question 14

Which of the following molecules does not have a net dipole moment of zero?

Accepted Answer

A) CCl4 
B) BF3 
C) CO2 
D) NH3 
A) CCl4 
B) BF3 
C) CO2 
D) NH3

Question 15

Which of the following is a resonance structure of the compound below?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 16

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

Accepted Answer

A) CO2 
B) H2S 
C) NH3 
D) H2O 
A) CO2 
B) H2S 
C) NH3 
D) H2O

Question 17

Convert the following skeletal structure to a condensed structure.

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 18

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. 
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.

Question 19

Which of the following molecules has the smallest dipole moment?

Accepted Answer

A) CO2 
B) HCl 
C) H2O 
D) NH3 
A) CO2 
B) HCl 
C) H2O 
D) NH3

Question 20

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

Accepted Answer

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

Exam 1: Structure and Bonding

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

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

What is the hybridization for each of the indicated atoms in the following compound?

What is the approximate bond angle for the C-C-N bond in acetonitrile, CH3CN?

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

What is the condensed formula of the compound below?

Which of the following Lewis structures is correct?

How many constitutional isomers are there for a molecule having the molecular formula C3H8O?

Which of the following pair does not represent resonance structures?

What is the hybridization of the nitrogen atom in the ammonium cation, NH4+?

Which of the following molecules has non-polar covalent bonds?

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

How many constitutional isomers are there for a molecule having the molecular formula C2H6O?

Which of the following molecules does not have a net dipole moment of zero?

Which of the following is a resonance structure of the compound below?

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

Convert the following skeletal structure to a condensed structure.

What 2 things will change between two resonance structures?

Which of the following molecules has the smallest dipole moment?

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

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers, and Related Compounds

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry;

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Filters

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

What is the approximate bond angle for the C-C-N bond in acetonitrile, CH₃CN?

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

How many constitutional isomers are there for a molecule having the molecular formula C₃H₈O?

What is the hybridization of the nitrogen atom in the ammonium cation, NH₄⁺?

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

How many constitutional isomers are there for a molecule having the molecular formula C₂H₆O?

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