Question 1

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 2

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 3

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 4

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 5

In which structure is the hybridization incorrect?

Accepted Answer

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

Question 6

Which of the following molecules are constitutional isomers?

Accepted Answer

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

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 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 9

When forming molecular orbitals from atomic orbitals,what is the order of increasing C-H bond strength for the following set?

Accepted Answer

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

Question 10

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 11

Which of the following would most likely form an ionic bond?

Accepted Answer

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

Question 12

How many electrons are around phosphorus in phosphoric acid (H3PO4)?

Accepted Answer

A) 6 
B) 8 
C) 10 
D) 12 
A) 6 
B) 8 
C) 10 
D) 12

Question 13

Determine the geometry around the indicated atom in each species.

Accepted Answer

A) I = Linear; II = tetrahedral; III = trigonal planar; IV = tetrahedral 
B) I = Linear; II = tetrahedral; III = trigonal planar; IV = linear 
C) I = Trigonal planar; II = linear; III = tetrahedral; IV = trigonal planar 
D) I = Tetrahedral; II = trigonal planar; III = linear; IV = tetrahedral 
A) I = Linear; II = tetrahedral; III = trigonal planar; IV = tetrahedral 
B) I = Linear; II = tetrahedral; III = trigonal planar; IV = linear 
C) I = Trigonal planar; II = linear; III = tetrahedral; IV = trigonal planar 
D) I = Tetrahedral; II = trigonal planar; III = linear; IV = tetrahedral

Question 14

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 15

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 16

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 17

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 18

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 19

What is the molecular geometry around the boron atom in BH3?

Accepted Answer

A) Tetrahedral 
B) Trigonal Planar 
C) Trigonal Pyramidal 
D) Linear 
A) Tetrahedral 
B) Trigonal Planar 
C) Trigonal Pyramidal 
D) Linear

Question 20

Which of the following molecules contain both covalent and ionic bonds?

Accepted Answer

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

Exam 1: Structure and Bonding

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

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

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

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

In which structure is the hybridization incorrect?

Which of the following molecules are constitutional isomers?

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

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

When forming molecular orbitals from atomic orbitals,what is the order of increasing C-H bond strength for the following set?

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

Which of the following would most likely form an ionic bond?

How many electrons are around phosphorus in phosphoric acid (H3PO4)?

Determine the geometry around the indicated atom in each species.

Which of the following pair does not represent resonance structures?

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

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?

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

What is the molecular geometry around the boron atom in BH3?

Which of the following molecules contain both covalent and ionic bonds?

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

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

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

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

How many electrons are around phosphorus in phosphoric acid (H₃PO₄)?

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

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?

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

What is the molecular geometry around the boron atom in BH₃?