Question 1

Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde, H2CO.

Accepted Answer

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

Question 2

What is the hybridization of the carbon atom in the methyl cation, (CH3+)?

Accepted Answer

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

Question 3

Which of the following is the appropriate conversion of the condensed structure, CH3COCH3, to a Lewis structure?

Accepted Answer

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

Question 4

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethylene, H2C=CH2?

Accepted Answer

A) Csp3 + Csp3, and C2p + C2p 
B) Csp3 + Csp3, and Csp2 + Csp2 
C) C. Csp2 + Csp2, and C2p + C2p 
D) D.Csp2 + Csp2, and Csp2 + Csp2 
A) Csp3 + Csp3, and C2p + C2p 
B) Csp3 + Csp3, and Csp2 + Csp2 
C) C. Csp2 + Csp2, and C2p + C2p 
D) D.Csp2 + Csp2, and Csp2 + Csp2

Question 5

Which of the following statements about constitutional isomers is true?

Accepted Answer

A) Constitutional isomers are different molecules having the different molecular formula. 
B) Constitutional isomers are different molecules having the same molecular formula. 
C) Constitutional isomers are same molecules having the different molecular formula. 
D) Constitutional isomers are same molecules having the same molecular formula. 
A) Constitutional isomers are different molecules having the different molecular formula. 
B) Constitutional isomers are different molecules having the same molecular formula. 
C) Constitutional isomers are same molecules having the different molecular formula. 
D) Constitutional isomers are same molecules having the same molecular formula.

Question 6

Consider compounds which contain both a heteroatom and a double bond.For which compound is no additional Lewis structure possible?

Accepted Answer

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

Question 7

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethane, CH3CH3?

Accepted Answer

A) Csp2 + H1s 
B) Csp3 + H1s 
C) C2p + H1s 
D) Csp + H1s 
A) Csp2 + H1s 
B) Csp3 + H1s 
C) C2p + H1s 
D) Csp + H1s

Question 8

Which of the following compounds has an atom with an unfilled valence shell of electrons?

Accepted Answer

A) H2O 
B) BCl3 
C) CH4 
D) CO2 
A) H2O 
B) BCl3 
C) CH4 
D) CO2

Question 9

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene, H2C=CH2?

Accepted Answer

A) C2p + H1s 
B) Csp + H1s 
C) Csp3 + H1s 
D) Csp2 + H1s 
A) C2p + H1s 
B) Csp + H1s 
C) Csp3 + H1s 
D) Csp2 + H1s

Question 10

How many different isomers are there for a compound having the molecular formula C3H6O?

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
A) 4 
B) 5 
C) 6 
D) 7

Question 11

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

Accepted Answer

A) I 
B) II 
C) III 
D) None of these 
A) I 
B) II 
C) III 
D) None of these

Question 12

What is the ground-state electronic configuration of a chlorine anion (Cl-)?

Accepted Answer

A) 1s2, 2s2, 2p6 
B) 1s2, 2s2, 2p6, 3s2, 3p6 
C) C. 1s2, 2s2, 2p6, 3s2, 3p5 
D) D. 1s2, 2s2, 2p6, 3s2, 3p4 
A) 1s2, 2s2, 2p6 
B) 1s2, 2s2, 2p6, 3s2, 3p6 
C) C. 1s2, 2s2, 2p6, 3s2, 3p5 
D) D. 1s2, 2s2, 2p6, 3s2, 3p4

Question 13

Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first.

Accepted Answer

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

Question 14

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

Accepted Answer

A) Csp + H1s 
B) C2p +H1s 
C) Csp3 + H1s 
D) Csp2 + H1s 
A) Csp + H1s 
B) C2p +H1s 
C) Csp3 + H1s 
D) Csp2 + H1s

Question 15

Which is more important in each pair of contributing resonance structures?

Accepted Answer

A) II, IV, V 
B) II, III, V 
C) II, III, VI 
D) I, IV, V 
A) II, IV, V 
B) II, III, V 
C) II, III, VI 
D) I, IV, V

Question 16

Which of the following compounds are non-polar?

Accepted Answer

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

Question 17

Which is the correct Lewis structure for acetic acid (CH3CO2H)?

Accepted Answer

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

Question 18

What is the order of decreasing bond length for a C-C bond composed of the following molecular orbitals?

Accepted Answer

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

Question 19

Which compound contains the most polar bond?

Accepted Answer

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

Question 20

Follow the curved arrows to draw the second resonance structure for the ion below.

Accepted Answer

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

Exam 1: Structure and Bonding

Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde, H2CO.

What is the hybridization of the carbon atom in the methyl cation, (CH3+)?

Which of the following is the appropriate conversion of the condensed structure, CH3COCH3, to a Lewis structure?

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethylene, H2C=CH2?

Which of the following statements about constitutional isomers is true?

Consider compounds which contain both a heteroatom and a double bond.For which compound is no additional Lewis structure possible?

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethane, CH3CH3?

Which of the following compounds has an atom with an unfilled valence shell of electrons?

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene, H2C=CH2?

How many different isomers are there for a compound having the molecular formula C3H6O?

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

What is the ground-state electronic configuration of a chlorine anion (Cl-)?

Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first.

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

Which is more important in each pair of contributing resonance structures?

Which of the following compounds are non-polar?

Which is the correct Lewis structure for acetic acid (CH3CO2H)?

What is the order of decreasing bond length for a C-C bond composed of the following molecular orbitals?

Which compound contains the most polar bond?

Follow the curved arrows to draw the second resonance structure for the ion below.

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

Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde, H₂CO.

What is the hybridization of the carbon atom in the methyl cation, (CH₃⁺)?

Which of the following is the appropriate conversion of the condensed structure, CH₃COCH₃, to a Lewis structure?

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethylene, H₂C=CH₂?

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethane, CH₃CH₃?

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene, H₂C=CH₂?

How many different isomers are there for a compound having the molecular formula C₃H₆O?

What is the ground-state electronic configuration of a chlorine anion (Cl^-)?

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

Which is the correct Lewis structure for acetic acid (CH₃CO₂H)?