Question 1

What is the ground-state electronic configuration of a fluorine atom?

Accepted Answer

A)  1s2, 2s2, 2p2 
B)  1s2, 2s2, 2p3 
C)  1s2, 2s2, 2p4 
D)  1s2, 2s2, 2p5 
A)  1s2, 2s2, 2p2 
B)  1s2, 2s2, 2p3 
C)  1s2, 2s2, 2p4 
D)  1s2, 2s2, 2p5

Question 2

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 3

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 4

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 5

Which compound contains the most polar bond? $\mathrm { CH } _ { 3 }$ $\begin{array} { c c } \mathrm { CH } _ { 3 } \mathrm { OH } & \mathrm { CH } _ { 3 } \mathrm { Cl } \end{array}$$\mathrm { CH } _ { 3 } \mathrm { NH } _ { 2 }$
I$\quad\quad\quad\quad$II$\quad\quad\quad$III$\quad\quad\quad$IV

Accepted Answer

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

Question 6

What is the ground-state electronic configuration of a carbon atom?

Accepted Answer

A)  1s2, 2s2, 2p5 
B)  1s2, 2s2, 2p2 
C)  1s2, 2s2, 2p6 
D)  1s2, 2s2, 2p4 
A)  1s2, 2s2, 2p5 
B)  1s2, 2s2, 2p2 
C)  1s2, 2s2, 2p6 
D)  1s2, 2s2, 2p4

Question 7

Which of the following molecules are constitutional isomers? $$\begin{array} { c c c c } 
\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { CH } _ { 3 } \mathrm { CH } ( \mathrm { OH } ) \mathrm { CH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OCH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { COCH } _ { 3 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

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 8

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 9

Which molecule has the greatest difference in electronegativity (F1F1F1S1F1F1F10E) between the two different elements?

Accepted Answer

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

Question 10

Determine the electron 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 11

Which of the following molecules contain both covalent and ionic bonds? $$\begin{array} { c c c c } 
\mathrm { NaCl } & \mathrm { NH } _ { 4 } \mathrm { OH } & \mathrm { CH } _ { 3 } \mathrm { OH } & \mathrm { MgCO } _ { 3 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

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

Question 12

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 13

How many constitutional isomers are there for a molecule having the molecular formula C2H4Cl2?

Accepted Answer

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

Question 14

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 15

Which of the following molecules has polar covalent bonds?

Accepted Answer

A)  MgO 
B)  NH3 
C)  Cl2 
D)  NaBr 
A)  MgO 
B)  NH3 
C)  Cl2 
D)  NaBr

Question 16

Which of the following Lewis structures is correct?

Accepted Answer

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

Question 17

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 18

Which atomic orbitals overlap to form the C-H F1F1F1S1F1F1F10 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 19

Which of the following compounds are non-polar? $$\begin{array} { c c c c } 
\mathrm { CO } _ { 2 } & \mathrm { NH } _ { 3 } & \mathrm { H } _ { 2 } \mathrm { O } & \mathrm { BCl } _ { 3 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

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 20

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

Exam 1: Structure and Bonding

What is the ground-state electronic configuration of a fluorine atom?

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

Convert the following skeletal structure to a condensed structure.

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

Which compound contains the most polar bond? CH3\mathrm { CH } _ { 3 }CH3​ CH3NH2\mathrm { CH } _ { 3 } \mathrm { NH } _ { 2 }CH3​NH2​ I \quad\quad\quad\quad II \quad\quad\quad III \quad\quad\quad IV

What is the ground-state electronic configuration of a carbon atom?

Which of the following molecules are constitutional isomers? () I II III IV

Which of the following Lewis structures is correct?

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

Determine the electron geometry around the indicated atom in each species.

Which of the following molecules contain both covalent and ionic bonds? I II III IV

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 C2H4Cl2?

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

Which of the following molecules has polar covalent bonds?

Which of the following Lewis structures is correct?

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

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

Which of the following compounds are non-polar? I II III IV

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

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 Epoxides

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Electrophilic Aromatic Substitution

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

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

Lipids

Synthetic Polymers

Filters

Which compound contains the most polar bond? $\mathrm { CH } _ { 3 }$ $\mathrm { CH } _ { 3 } \mathrm { NH } _ { 2 }$ I $\quad\quad\quad\quad$ II $\quad\quad\quad$ III $\quad\quad\quad$ IV

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 C₂H₄Cl₂?

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

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

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