Question 1

What is the ground-state electronic configuration of a nitrogen atom (nitrogen: atomic number 7)?

Accepted Answer

A)  1s22s12p4 
B)  1s22s22p3 
C)  1s12s12p5 
D)  1s22s22p2 
A)  1s22s12p4 
B)  1s22s22p3 
C)  1s12s12p5 
D)  1s22s22p2

Question 2

Which of the following compounds is a ketone?

Accepted Answer

A)  CH3CH2COOH 
B)  CH3CH2CHO 
C)  CH3CH2CH2OH 
D)  CH3COCH3 
A)  CH3CH2COOH 
B)  CH3CH2CHO 
C)  CH3CH2CH2OH 
D)  CH3COCH3

Question 3

Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO] -?

Accepted Answer

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

Question 4

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Accepted Answer

Question 5

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Accepted Answer

Question 6

Which of the following is trigonal planar?

Accepted Answer

A)  boron trifluoride, BF3 
B)  methyl anion, CH3- 
C)  methane, CH4 
D)  ammonia, NH3 
A)  boron trifluoride, BF3 
B)  methyl anion, CH3- 
C)  methane, CH4 
D)  ammonia, NH3

Question 7

How many electrons can the shell with a principal quantum number of 2 hold?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  8 
A)  1 
B)  2 
C)  4 
D)  8

Question 8

Which of the following best represents an sp2 hybridized atomic orbital of carbon which overlaps with the 1s atomic orbital of hydrogen to form a C-H s bonding molecular orbital in ethene, H2C=CH2

Accepted Answer

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

Question 9

Which of the following bonds is the most polar?

Accepted Answer

A)  O-H 
B)  C-H 
C)  C-C 
D)  H-H 
A)  O-H 
B)  C-H 
C)  C-C 
D)  H-H

Question 10

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

Accepted Answer

A)  C2p + C2p 
B)  C2sp + C2sp 
C)  C2sp2 + C2sp2 
D)  C2sp3 + C2sp3 
A)  C2p + C2p 
B)  C2sp + C2sp 
C)  C2sp2 + C2sp2 
D)  C2sp3 + C2sp3

Question 11

What is the molecular formula of Ritalin, shown below?

Accepted Answer

The answer of What is the molecular formula of Ritalin,...

Question 12

Which of the following molecules has a molecular dipole?

Accepted Answer

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

Question 13

Which of the following bonds has the smallest dipole moment?

Accepted Answer

A)  C-N 
B)  C-O 
C)  C-F 
D)  O-H 
A)  C-N 
B)  C-O 
C)  C-F 
D)  O-H

Question 14

Which of the following best represents the shape of a 2p atomic orbital of carbon?

Accepted Answer

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

Question 15

Which of the following compounds is a carboxylic ester?

Accepted Answer

A)  CH3CH2COOH 
B)  CH3CH2OCH3 
C)  CH3CH2COOCH3 
D)  CH3CH2COCH3 
A)  CH3CH2COOH 
B)  CH3CH2OCH3 
C)  CH3CH2COOCH3 
D)  CH3CH2COCH3

Question 16

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H2C=CH2?

Accepted Answer

A)  C2p + H1s 
B)  C2sp + H1s 
C)  C2sp2 + H1s 
D)  C2sp3 + H1s 
A)  C2p + H1s 
B)  C2sp + H1s 
C)  C2sp2 + H1s 
D)  C2sp3 + H1s

Question 17

Convert the following structure into a bond-line drawing.

Accepted Answer

The answer of Convert the following structure into a bond-line...

Question 18

How many electrons can the shell with a principal quantum number of 1 hold?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  8 
A)  1 
B)  2 
C)  4 
D)  8

Question 19

Which of the following molecules has a molecular dipole?

Accepted Answer

A)  H2O 
B)  CO2 
C)  HCºCH 
D)  Cl2 
A)  H2O 
B)  CO2 
C)  HCºCH 
D)  Cl2

Question 20

Which of the following shows curved arrows that correctly accounts for the differences between the two structures?

Accepted Answer

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

Exam 1: Covalent Bonding and Shapes of Molecules

What is the ground-state electronic configuration of a nitrogen atom (nitrogen: atomic number 7)?

Which of the following compounds is a ketone?

Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO] -?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Which of the following is trigonal planar?

How many electrons can the shell with a principal quantum number of 2 hold?

Which of the following best represents an sp2 hybridized atomic orbital of carbon which overlaps with the 1s atomic orbital of hydrogen to form a C-H s bonding molecular orbital in ethene, H2C=CH2

Which of the following bonds is the most polar?

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

What is the molecular formula of Ritalin, shown below?

Which of the following molecules has a molecular dipole?

Which of the following bonds has the smallest dipole moment?

Which of the following best represents the shape of a 2p atomic orbital of carbon?

Which of the following compounds is a carboxylic ester?

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H2C=CH2?

Convert the following structure into a bond-line drawing.

How many electrons can the shell with a principal quantum number of 1 hold?

Which of the following molecules has a molecular dipole?

Which of the following shows curved arrows that correctly accounts for the differences between the two structures?

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Filters

Which of the following resonance structures makes the largest contribution to the structure of [H₂CCHO]^-?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Which of the following best represents an sp² hybridized atomic orbital of carbon which overlaps with the 1s atomic orbital of hydrogen to form a C-H s bonding molecular orbital in ethene, H₂C=CH₂

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H₂C=CH₂?