Question 1

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

Accepted Answer

A) There is no movement of electrons from one form to another. 
B) Resonance structures are not isomers. 
C) Resonance structures differ only in the arrangement of electrons. 
D) Resonance structures are in equilibrium with each other. 
A) There is no movement of electrons from one form to another. 
B) Resonance structures are not isomers. 
C) Resonance structures differ only in the arrangement of electrons. 
D) Resonance structures are in equilibrium with each other.

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

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 4

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 5

Which of the following molecules has a net dipole moment of zero?

Accepted Answer

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

Question 6

Which of the following atoms will have a full 3s orbital in the ground state?

Accepted Answer

A) Hydrogen 
B) Lithium 
C) Potassium 
D) Rubidium 
A) Hydrogen 
B) Lithium 
C) Potassium 
D) Rubidium

Question 7

Which of the following would you expect to have ionic bonds?

Accepted Answer

A) CO 
B) FBr 
C) NF3 
D) NaCl 
A) CO 
B) FBr 
C) NF3 
D) NaCl

Question 8

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 9

Which of the following compounds has an atom with more than eight valence electrons?

Accepted Answer

A) H2CO3 
B) H2SO4 
C) H2O 
D) HBr 
A) H2CO3 
B) H2SO4 
C) H2O 
D) HBr

Question 10

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 11

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 12

What is the ground-state electronic configuration of a magnesium cation (Mg2+)?

Accepted Answer

A) 1s2,2s2,2p6 
B) 1s2,2s2,2p6,3s1 
C) 1s2,2s2,2p6,3s2 
D) 1s2,2s2,2p6,3s2,3p2 
A) 1s2,2s2,2p6 
B) 1s2,2s2,2p6,3s1 
C) 1s2,2s2,2p6,3s2 
D) 1s2,2s2,2p6,3s2,3p2

Question 13

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

Question 14

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

Accepted Answer

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

Question 15

Which of the following statements about valence electrons is true?

Accepted Answer

A) They are the most tightly held electrons. 
B) They do not participate in chemical reactions. 
C) They are the outermost electrons. 
D) They reveal the period number of a second-row element. 
A) They are the most tightly held electrons. 
B) They do not participate in chemical reactions. 
C) They are the outermost electrons. 
D) They reveal the period number of a second-row element.

Question 16

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 17

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 18

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 19

What is the approximate H-C-O bond angle in formaldehyde,H2CO?

Accepted Answer

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

Question 20

Which of the following statements about bonding is true?

Accepted Answer

A) Covalent bonds result from the transfer of electrons from one element to another. 
B) Ionic bonds result from the transfer of electrons from a metal to a non-metal. 
C) Ionic bonds result from the sharing of electrons between two non-metals. 
D) Covalent bonds result from the sharing of electrons between two metals. 
A) Covalent bonds result from the transfer of electrons from one element to another. 
B) Ionic bonds result from the transfer of electrons from a metal to a non-metal. 
C) Ionic bonds result from the sharing of electrons between two non-metals. 
D) Covalent bonds result from the sharing of electrons between two metals.

Exam 1: Structure and Bonding

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

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

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

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

Which of the following molecules has a net dipole moment of zero?

Which of the following atoms will have a full 3s orbital in the ground state?

Which of the following would you expect to have ionic bonds?

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

Which of the following compounds has an atom with more than eight valence electrons?

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

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

What is the ground-state electronic configuration of a magnesium cation (Mg2+)?

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

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

Which of the following statements about valence electrons is true?

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

Which of the following molecules has the smallest dipole moment?

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

What is the approximate H-C-O bond angle in formaldehyde,H2CO?

Which of the following statements about bonding is true?

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 and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation,resonance,and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Spectroscopy A: Mass Spectrometry

Spectroscopy B: Infrared Spectroscopy

Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

Filters

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

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

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

What is the ground-state electronic configuration of a magnesium cation (Mg²⁺)?

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

What is the approximate H-C-O bond angle in formaldehyde,H₂CO?