Deck 1: The Basics

Question 1

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

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

Answer 1

H and Cl.

Question 2

Considering Lewis structures,which of these compounds possesses a single unpaired electron?

A)N₂
B)N₂O
C)NO
D)N₂O₄
E)O₂

Answer 2

NO

Question 3

Credit for the first synthesis of an organic compound from an inorganic precursor is usually given to ___.

A)Berzelius
B)Arrhenius
C)Kekule
D)Wöhler
E)Lewis

Answer 3

Wöhler

Question 4

Select the most electronegative element from the list below.

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

Question 5

Which of the following is the Lewis structure for CH₃CH₂O₂H?

A)
B)
C)
D)
E)None of these choices.

Question 6

What is the formal charge on carbon in the following structure?

A)+2
B)+1
C)0
D)-1
E)-2

Question 7

is a generalized structural representation which can be used for all of the following,except:

A)H₂O
B)H₂Se
C)H₂S
D)BeH₂
E)There is no exception.

Question 8

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

A)fluorine
B)nitrogen
C)carbon
D)sulfur
E)beryllium

Question 9

Which is NOT a correct Lewis structure?

A)
B)
C)
D)
E)None of these choices.

Question 10

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

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

Question 11

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

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 12

In which structure(s)below does the oxygen have a formal charge of +1? s

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

Question 13

What is the formal charge on oxygen in the following structure?

A)+2
B)+1
C)0
D)-1
E)-2

Question 14

Which type of bonding is present in the compound CH₃Li?

A)Ionic bonding
B)Covalent bonding
C)Hydrogen bonding
D)Ionic and covalent bonding
E)Ionic,covalent,and hydrogen bonding

Question 15

Which of the following compounds contain a sulfur atom that bears a +1 formal charge?

A)H₂S
B)SO₂
C)SF₆
D)MgSO₄
E)H₂SO₄

Question 16

Select the least electronegative element from the list below.

A)P
B)N
C)Mg
D)Si
E)K

Question 17

Which structure(s)contain(s)an oxygen that bears a formal charge of +1?

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

Question 18

Which of these substances contain both covalent and ionic bonds?

A)NH₄Cl
B)H₂O₂
C)CH₄
D)HCN
E)H₂S

Question 19

Which of the following is the Lewis structure for CH₃CO₂H?

A)
B)
C)
D)
E)

Question 20

In which of the following does the central atom have 2 pairs of non-bonding electrons?

A)O₃
B)CO₂
C)CO₃^2-
D)NH₄⁺
E)H₂S

Question 21

Which compound is not a constitutional isomer of the others?

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

Question 22

Which of the following represent pairs of constitutional isomers?

A)
B)
C)
D)None of these pairs.
E)All of these pairs.

Question 23

In which of these cases does the central atom have a zero formal charge?

A)HFH
B)
C)
D)
E)

Question 24

Which of the following represent a pair of constitutional isomers?

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

Question 25

Which compound is not a constitutional isomer of the others?

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

Question 26

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

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

Question 27

What is the formal charge on oxygen in the following structure?

A)+2
B)+1
C)0
D)-1
E)-2

Question 28

Which of the following structures represent compounds that are constitutional isomers of each other?

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

Question 29

The formal charge on sulfur in sulfuric acid is:

A)0
B)-1
C)+1
D)-2
E)+2

Question 30

Which of the following compounds is not a constitutional isomer of the others?

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

Question 31

In which structure(s)below does nitrogen have a formal charge of +1?

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

Question 32

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?

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

Question 33

Which of the following is an ion with a negative one charge?

A)
B)
C)
D)All of these choices.
E)None of these choices.

Question 34

Which of the following molecules or ions has a nitrogen with a formal charge of -1?

A)
B)
C)
D)
E)

Question 35

Which compound is not a constitutional isomer of the others?

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

Question 36

CH₃CH₂OCH₂CH₃ and CH₃CH₂CH₂CH₂OH are examples of what are now termed:

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

Question 37

Which of the following is a set of constitutional isomers?

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

Question 38

Which compound contains a nitrogen atom with a formal positive charge?

A)I
B)II
C)III
D)More than one of these choices.
E)None of these choices.

Question 39

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 is negatively charged?

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

Question 40

Which of the following structure is an acceptable bond line formula for CH₃CHClCHCH₂?

A)I
B)I and IV
C)II and III
D)I,II,and III
E)All of these choices.

Question 41

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

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

Question 42

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

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

Question 43

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

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

Question 44

Which of the following could not be a resonance structure of CH₃NO₂?

A)
B)
C)
D)
E)More than one of these choices.

Question 45

Which of the following species is a resonance form of the species in the box?

A)I
B)II
C)III
D)IV
E)None of these choices are correct resonance forms.

Question 46

Which of the following species is/are a resonance form(s)of the species in the box?

A)I and II
B)I and III
C)III and IV
D)III
E)More than two of these choices are correct resonance forms.

Question 47

Which of the following structures is/are not a resonance form of the following species?

A)
B)
C)
D)
E)None of these choices are correct resonance forms.

Question 48

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

A)I
B)II
C)III
D)IV
E)More than two of these choices are incorrect resonance forms.

Question 49

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

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

Question 50

Which of the following species is/are a resonance form(s)of the species in the box?

A)I and II
B)II and III
C)III
D)II
E)More than two of these choices are correct resonance forms.

Question 51

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

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

Question 52

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

A)I
B)II
C)III
D)IV
E)More than two of these choices are incorrect resonance forms.

Question 53

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

A)I
B)II
C)III
D)IV
E)More than two of these choices are incorrect resonance forms.

Question 54

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

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

Question 55

Which of the following species is a resonance form of the following species?

A)
B)
C)
D)
E)All of these choices are correct resonance forms.

Question 56

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

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

Question 57

Which of the following pairs are NOT resonance structures?

A)

B)
C)
D)Each of these pairs represents resonance structures.
E)None of these pairs represents resonance structures.

Question 58

Which of the following species are resonance forms of the species in the box?

A)I and III
B)I and II
C)III and IV
D)II and IV
E)All of these choices are correct resonance forms.

Question 59

Which of the structures below is not expected to contribute to the CO₂ resonance hybrid?

A)
B)
C)
D)
E)

Question 60

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

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

Question 61

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

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

Question 62

Select the hybridized atomic orbital.

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

Question 63

When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule,how are the electrons distributed in the resulting molecular orbitals?

A)Two electrons in the bonding molecular orbital.
B)One electron in the bonding molecular orbital,one electron in the non-bonding molecular orbital.
C)One electron in the bonding molecular orbital,one electron in the antibonding molecular orbital.
D)Two electrons in the non-bonding molecular orbital.
E)Two electrons in the antibonding molecular orbital.

Question 64

Consider the following: CH₃CH₂CH₂CH=CHCH₂CH₂CH₃ CH₃CH₂CH₂CH₂CH₂CH₂CH=CH₂
I II
CH₃CH₂CH=CHCH₂CH₂CH₂CH₃ CH₂=CHCH₂CH₂CH₂CH₂CH₂CH₃
III IV
Which structures can exist as cis-trans isomers?

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

Question 65

When two waves with equal amplitude and the opposite phase sign interact this results in generating

A)a wave that has half the amplitude of the original wave.
B)a wave that has double the amplitude of the original wave.
C)no wave as it has an amplitude of zero.
D)two new waves that have opposite phase signs of each other.
E)none of these choices.

Question 66

How many sigma 1s-2sp³ bonds are there in ethane?

A)7
B)6
C)5
D)3
E)1

Question 67

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

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

Question 68

What point on the potential energy diagram below represents the most stable state for the hydrogen molecule?

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

Question 69

Cis-trans isomerism is possible only in the case of:

A)CH₂=CBr₂
B)CH₂=CHBr
C)BrCH=CHBr
D)Br₂C=CHBr
E)Br₂C=CBr₂

Question 70

How many s-sp² bonds are there in the following substance?

A)2
B)3
C)4
D)5
E)12

Question 71

The C4-C5 carbon-carbon bond in the following molecule results from the overlap of which orbitals (in the order C4-C5)?

A)sp-sp²
B)sp-sp³
C)sp²-sp²
D)sp²-sp³
E)sp³-sp²

Question 72

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

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

Question 73

The relative probability of finding an electron a certain distance from the nucleus can be calculated using ___.

A)electron configuration
B)the wave function
C)statistical probability
D)atomic orbitals
E)all of these choices

Question 74

Which principle(s)or rule(s)must be used to determine the correct electronic configuration for carbon in its ground state?

A)Aufbau principle
B)Hund's Rule
C)Pauli exclusion principle
D)Aufbau principle and Hund's rule only
E)Aufbau principle,Hund's rule,and Pauli exclusion principle

Question 75

In quantum mechanics a node (nodal surface or plane)is

A)a place where $\varPsi$ is negative.
B)a place where $\varPsi$ is positive.
C)a place where $\varPsi$ = 0.
D)a place where $\varPsi$ ² is large.
E)a place where $\varPsi$ ² is negative.

Question 76

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:

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

Question 77

How many resonance structures can be written for the NO₃^- ion in which the nitrogen atom bears a formal charge of +1?

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

Question 78

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

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.

Question 79

Which of the following species exhibits resonance stabilization?

A)H₂SO₄
B)O₃
C)CO₂
D)CCl₄
E)None of the species exhibit resonance.

Question 80

According to molecular orbital theory,which molecule could not exist?

A)H₂
B)He₂
C)Li₂
D)F₂
E)N₂