Question 1

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 A

Question 2

What is the hybridization of the C indicated with the arrow?

Accepted Answer

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

Question 3

The greatest degree of ionic character is anticipated for the bond between

Accepted Answer

A) H and C. 
B) H and Cl. 
C) C and Cl. 
D) H and Br. 
E) Br and Cl. 
A) H and C. 
B) H and Cl. 
C) C and Cl. 
D) H and Br. 
E) Br and Cl. B

Question 4

What is the hybridization of the N atom in the following molecule?

Accepted Answer

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

Question 5

How many s-sp3 bonds are there in the following substance?

Accepted Answer

A) 3 
B) 8 
C) 12 
D) 13 
E) 16 
A) 3 
B) 8 
C) 12 
D) 13 
E) 16

Question 6

Listed below are electron dot formulas for several simple molecules and ions.All valence electrons are shown; however,electrical charges have been omitted deliberately.   Which of the structures actually bear(s)a positive charge?

Accepted Answer

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

Question 7

When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule,how many molecular orbitals are formed?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 8

Which of the structures below would be trigonal planar (a planar triangle)? (Electrical charges have been deliberately omitted.)

Accepted Answer

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

Question 9

Which of these substances contain both covalent and ionic bonds?

Accepted Answer

A) NH4Cl 
B) H2O2 
C) CH4 
D) HCN 
E) H2S 
A) NH4Cl 
B) H2O2 
C) CH4 
D) HCN 
E) H2S

Question 10

Which of the following best describes the origin of carbon atoms?

Accepted Answer

A) The Big Bang 
B) amino acids found on meteorites 
C) byproduct of chemical fusion in stars 
D) gradual decay of radioactive isotopes of nitrogen 
E) All of these choices. 
A) The Big Bang 
B) amino acids found on meteorites 
C) byproduct of chemical fusion in stars 
D) gradual decay of radioactive isotopes of nitrogen 
E) All of these choices.

Question 11

Which compound is not a constitutional isomer of the others?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) All of these choices are isomers of each other. 
A) I 
B) II 
C) III 
D) IV 
E) All of these choices are isomers of each other.

Question 12

CH3CH2OCH2CH3 and CH3CH2CH2CH2OH are examples of what are now termed:

Accepted Answer

A) Conformational isomers 
B) Resonance structures 
C) Functional isomers 
D) Empirical isomers 
E) Constitutional isomers 
A) Conformational isomers 
B) Resonance structures 
C) Functional isomers 
D) Empirical isomers 
E) Constitutional isomers

Question 13

Identify the atomic orbital the lone pair electrons on the C atom are contained in:

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

If a tetrahedral carbon atom were to lose its electrons from a single covalent bond its hybridization would change from sp3 hybridized to sp2 hybridized.

Accepted Answer

A) True 
 B)False

Question 16

Draw all the isomers of C4H9Br,using bond-line formulas.

Accepted Answer

Question 17

Select the hybridized atomic orbital.

Accepted Answer

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

Question 18

Which of the following represent a pair of constitutional isomers?

Accepted Answer

A)    
B) CH3CH=CH2 and CH2=CHCH3 
C)    
D)    
E) More than one of these choices. 
A)    
B) CH3CH=CH2 and CH2=CHCH3 
C)    
D)    
E) More than one of these choices.

Question 19

Consider the following: CH3CH2CH=CHCH2CH3   CH3CH2CH2CH2CH=CH2
I II
CH3CH=CHCH2CH2CH3   CH2=CHCH2CH2CH2CH3
III IV
Which two structures represent the same compound?

Accepted Answer

A) I and II 
B) II and III 
C) I and III 
D) II and IV 
E) None of these choices. 
A) I and II 
B) II and III 
C) I and III 
D) II and IV 
E) None of these choices.

Question 20

When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule,which molecular orbitals are formed?

Accepted Answer

A) One bonding molecular orbital only. 
B) Two bonding molecular orbitals. 
C) One bonding molecular orbital and one antibonding molecular orbital. 
D) Two antibonding molecular orbitals. 
E) Three bonding molecular orbitals. 
A) One bonding molecular orbital only. 
B) Two bonding molecular orbitals. 
C) One bonding molecular orbital and one antibonding molecular orbital. 
D) Two antibonding molecular orbitals. 
E) Three bonding molecular orbitals.

Exam 1: The Basics

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

What is the hybridization of the C indicated with the arrow?

The greatest degree of ionic character is anticipated for the bond between

What is the hybridization of the N atom in the following molecule?

How many s-sp3 bonds are there in the following substance?

Listed below are electron dot formulas for several simple molecules and ions.All valence electrons are shown; however,electrical charges have been omitted deliberately. Which of the structures actually bear(s)a positive charge?

When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule,how many molecular orbitals are formed?

Which of the structures below would be trigonal planar (a planar triangle)? (Electrical charges have been deliberately omitted.)

Which of these substances contain both covalent and ionic bonds?

Which of the following best describes the origin of carbon atoms?

Which compound is not a constitutional isomer of the others?

CH3CH2OCH2CH3 and CH3CH2CH2CH2OH are examples of what are now termed:

Identify the atomic orbital the lone pair electrons on the C atom are contained in:

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

If a tetrahedral carbon atom were to lose its electrons from a single covalent bond its hybridization would change from sp3 hybridized to sp2 hybridized.

Draw all the isomers of C4H9Br,using bond-line formulas.

Select the hybridized atomic orbital.

Which of the following represent a pair of constitutional isomers?

Consider the following: CH3CH2CH=CHCH2CH3 CH3CH2CH2CH2CH=CH2 I II CH3CH=CHCH2CH2CH3 CH2=CHCH2CH2CH2CH3 III IV Which two structures represent the same compound?

When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule,which molecular orbitals are formed?

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

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

How many s-sp³ bonds are there in the following substance?

CH₃CH₂OCH₂CH₃ and CH₃CH₂CH₂CH₂OH are examples of what are now termed:

If a tetrahedral carbon atom were to lose its electrons from a single covalent bond its hybridization would change from sp³ hybridized to sp² hybridized.

Draw all the isomers of C₄H₉Br,using bond-line formulas.

Consider the following: CH₃CH₂CH=CHCH₂CH₃CH₃CH₂CH₂CH₂CH=CH₂ I II CH₃CH=CHCH₂CH₂CH₃CH₂=CHCH₂CH₂CH₂CH₃ III IV Which two structures represent the same compound?