Question 1

The bond angle for the H-C-O bonds in the following molecule would be expected to be approximately:

Accepted Answer

A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  145 $\degree$ 
E)  180 $\degree$ 
A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  145 $\degree$ 
E)  180 $\degree$

Question 2

In which molecule(s)can the molecular geometry be attributed to an sp2 hybridized central atom?

Accepted Answer

A)  PBr3 
B)  CH4 
C)  CHCl3 
D)  HNO2 
E)  None of the above has an sp2 hybridized central atom. 
A)  PBr3 
B)  CH4 
C)  CHCl3 
D)  HNO2 
E)  None of the above has an sp2 hybridized central atom.

Question 3

The bond angle for the C-C-O bonds in the following molecule would be expected to be approximately:

Accepted Answer

A)  90$\degree$ 
B)  109$\degree$ 
C)  120$\degree$ 
D)  145$\degree$ 
E)  180$\degree$ 
A)  90$\degree$ 
B)  109$\degree$ 
C)  120$\degree$ 
D)  145$\degree$ 
E)  180$\degree$

Question 4

Which of the following species is not a resonance form of the following species?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 5

Which of the following species contributes more to the overall hybrid for the species in the box?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  The one in the box. 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  The one in the box.

Question 6

Which of the following species contributes more to the overall hybrid for the species in the box?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  The one in the box. 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  The one in the box.

Question 7

According to molecular orbital theory,in the case of a carbon-carbon double bond,the carbon-carbon bonding electrons of higher energy occupy this molecular orbital:

Accepted Answer

A)  "$\sigma$ bonding MO" 
B)  " $\pi$ bonding MO" 
C)  "$\sigma$* antibonding MO" 
D)  " $\pi$* antibonding MO" 
E)  " $\pi$* bonding MO" 
A)  "$\sigma$ bonding MO" 
B)  " $\pi$ bonding MO" 
C)  "$\sigma$* antibonding MO" 
D)  " $\pi$* antibonding MO" 
E)  " $\pi$* bonding MO"

Question 8

Which molecule would be linear? (In each case you should write a Lewis structure before deciding. )

Accepted Answer

A)  SO2 
B)  HCN 
C)  H2O2 
D)  H2S 
E)  OF2 
A)  SO2 
B)  HCN 
C)  H2O2 
D)  H2S 
E)  OF2

Question 9

Identify the atomic orbital.The lone pair electrons on the N atom are contained in:

Accepted Answer

A)  2sp2 
B)  2sp3 
C)  2sp 
D)  2s 
E)  2p 
A)  2sp2 
B)  2sp3 
C)  2sp 
D)  2s 
E)  2p

Question 10

Which of these is a correct electron-dot representation of the nitrite ion,NO2-?

Accepted Answer

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

Question 11

Which molecule has a non-linear shape (i.e. ,for which molecule are the nuclei not in a straight line)?

Accepted Answer

A)  O=C=O 
B)  H-O-H 
C)  H-Cl 
D)  H-C$ \equiv$N 
E)  H-C$ \equiv$C-H 
A)  O=C=O 
B)  H-O-H 
C)  H-Cl 
D)  H-C$ \equiv$N 
E)  H-C$ \equiv$C-H

Question 12

Select the most electronegative element from the list below:

Accepted Answer

A)  H 
B)  O 
C)  N 
D)  B 
E)  C 
A)  H 
B)  O 
C)  N 
D)  B 
E)  C

Question 13

What geometry does the methyl cation,CH3+,have?

Accepted Answer

A)  Octahedral 
B)  Tetrahedral 
C)  Trigonal planar 
D)  Linear 
E)  Trigonal pyramidal 
A)  Octahedral 
B)  Tetrahedral 
C)  Trigonal planar 
D)  Linear 
E)  Trigonal pyramidal

Question 14

Identify the atomic orbital.The lone pair electrons on the B atom are contained in:

Accepted Answer

A)  2sp2 
B)  2sp3 
C)  2p 
D)  2s 
E)  There are no lone pair electrons on B 
A)  2sp2 
B)  2sp3 
C)  2p 
D)  2s 
E)  There are no lone pair electrons on B

Question 15

Which molecule contains an sp-hybridized carbon?

Accepted Answer

A)  HCN 
B)  CH2=CH2 
C)  CH3Cl 
D) 
  
E)  CH3CH3 
A)  HCN 
B)  CH2=CH2 
C)  CH3Cl 
D) 
  
E)  CH3CH3

Question 16

Expansion of the valence shell to accommodate more than eight electrons is possible with:

Accepted Answer

A)  Fluorine 
B)  Nitrogen 
C)  Carbon 
D)  Sulfur 
E)  Beryllium 
A)  Fluorine 
B)  Nitrogen 
C)  Carbon 
D)  Sulfur 
E)  Beryllium

Question 17

The bond angle for the C-P-C bonds in (C6H5)3P would be expected to be approximately:

Accepted Answer

A)  60 $\degree$ 
B)  90 $\degree$ 
C)  109 $\degree$ 
D)  120 $\degree$ 
E)  180 $\degree$ 
A)  60 $\degree$ 
B)  90 $\degree$ 
C)  109 $\degree$ 
D)  120 $\degree$ 
E)  180 $\degree$

Question 18

Which of the following species is/are not a resonance form(s)of the anionic species in the box?

Accepted Answer

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

Question 19

Which of the following contains an sp2-hybridized carbon?

Accepted Answer

A)  CH4 
B)  CH3: - 
C)  CH3CH3 
D)  CH3+ 
E)  HC$ \equiv$CH 
A)  CH4 
B)  CH3: - 
C)  CH3CH3 
D)  CH3+ 
E)  HC$ \equiv$CH

Question 20

The bond angle for the C-O-C bonds in the following molecule would be expected to be approximately:

Accepted Answer

A)  90$\degree$ 
B)  109$\degree$ 
C)  120$\degree$ 
D)  145$\degree$ 
E)  180$\degree$ 
A)  90$\degree$ 
B)  109$\degree$ 
C)  120$\degree$ 
D)  145$\degree$ 
E)  180$\degree$

Exam 1: Carbon Compounds and Chemical Bonds

The bond angle for the H-C-O bonds in the following molecule would be expected to be approximately:

In which molecule(s)can the molecular geometry be attributed to an sp2 hybridized central atom?

The bond angle for the C-C-O bonds in the following molecule would be expected to be approximately:

Which of the following species is not a resonance form of the following species?

Which of the following species contributes more to the overall hybrid for the species in the box?

Which of the following species contributes more to the overall hybrid for the species in the box?

According to molecular orbital theory,in the case of a carbon-carbon double bond,the carbon-carbon bonding electrons of higher energy occupy this molecular orbital:

Which molecule would be linear? (In each case you should write a Lewis structure before deciding. )

Identify the atomic orbital.The lone pair electrons on the N atom are contained in:

Which of these is a correct electron-dot representation of the nitrite ion,NO2-?

Which molecule has a non-linear shape (i.e. ,for which molecule are the nuclei not in a straight line)?

Select the most electronegative element from the list below:

What geometry does the methyl cation,CH3+,have?

Identify the atomic orbital.The lone pair electrons on the B atom are contained in:

Which molecule contains an sp-hybridized carbon?

Expansion of the valence shell to accommodate more than eight electrons is possible with:

The bond angle for the C-P-C bonds in (C6H5)3P would be expected to be approximately:

Which of the following species is/are not a resonance form(s)of the anionic species in the box?

Which of the following contains an sp2-hybridized carbon?

The bond angle for the C-O-C bonds in the following molecule would be expected to be approximately:

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

In which molecule(s)can the molecular geometry be attributed to an sp² hybridized central atom?

Which of these is a correct electron-dot representation of the nitrite ion,NO₂^-?

What geometry does the methyl cation,CH₃⁺,have?

The bond angle for the C-P-C bonds in (C₆H₅)₃P would be expected to be approximately:

Which of the following contains an sp²-hybridized carbon?