Deck 1: Structure and Bonding

Question 1

Which of the following Lewis structures is correct?

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

Answer 1

II,III

Question 2

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

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

Answer 2

1s²,2s²,2p²

Question 3

Which of the following would you expect to have ionic bonds?

A)CO
B)FBr
C)NF₃
D)NaCl

Answer 3

NaCl

Question 4

Which of the following would most likely form an ionic bond?

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

Question 5

Which is not an acceptable Lewis structure for the anion CH₂NCO^-?

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

Question 6

Which of the following statements correctly describes the typical number of bonds for carbon,nitrogen,and oxygen in most neutral organic molecules?

A)Carbon forms 4 covalent bonds,nitrogen forms 2 covalent bonds,and oxygen forms 3 covalent bonds.
B)Carbon forms 4 covalent bonds,nitrogen forms 3 covalent bonds,and oxygen forms 2 covalent bonds.
C)Carbon forms 4 covalent bonds,nitrogen forms 5 covalent bonds,and oxygen forms 2 covalent bonds.
D)Carbon forms 4 covalent bonds,nitrogen forms 5 covalent bonds,and oxygen forms 4 covalent bonds.

Question 7

Which is the correct Lewis structure for acetic acid (CH₃CO₂H)?

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

Question 8

In which of the following ions does carbon have a formal charge?

A)I
B)II
C)III
D)None of these

Question 9

Which of the following atoms will have a full 3s orbital in the ground state?

A)Hydrogen
B)Lithium
C)Potassium
D)Rubidium

Question 10

Which of the following statements about valence electrons is true?

A)They are the most tightly held electrons.
B)They do not participate in chemical reactions.
C)They are the outermost electrons.
D)They reveal the period number of a second-row element.

Question 11

Which of the following Lewis structures is correct?

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

Question 12

In which of the following ions does carbon have a formal charge?

A)I
B)II
C)III
D)None of these

Question 13

Which of the following molecules contain both covalent and ionic bonds?

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

Question 14

Which of the following molecules has nonpolar covalent bonds?

A)HCl
B)N₂
C)CHCl₃
D)NO

Question 15

What is the ground-state electronic configuration of a magnesium cation (Mg²⁺)?

A)1s²,2s²,2p⁶
B)1s²,2s²,2p⁶,3s¹
C)1s²,2s²,2p⁶,3s²
D)1s²,2s²,2p⁶,3s²,3p²

Question 16

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

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

Question 17

What is the formal charge of the carbon in carbon dioxide (CO₂)when drawn with two double bonds?

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

Question 18

Which of the following statements about bonding is true?

A)Covalent bonds result from the transfer of electrons from one element to another.
B)Ionic bonds result from the transfer of electrons from a metal to a non-metal.
C)Ionic bonds result from the sharing of electrons between two non-metals.
D)Covalent bonds result from the sharing of electrons between two metals.

Question 19

What is the ground-state electronic configuration of a chlorine anion (Cl^-)?

A)1s²,2s²,2p⁶
B)1s²,2s²,2p⁶,3s²,3p⁶
C)1s²,2s²,2p⁶,3s²,3p⁵
D)1s²,2s²,2p⁶,3s²,3p⁴

Question 20

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

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

Question 21

Which of the following compounds has an atom with an unfilled valence shell of electrons?

A)H₂O
B)BCl₃
C)CH₄
D)CO₂

Question 22

How many constitutional isomers are there for a molecule having the molecular formula C₃H₆?

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

Question 23

What 2 things will change between two resonance structures?

A)The position of multiple bonds and non-bonded electrons.
B)The position of multiple bonds and single bonds.
C)The placement of atoms and single bonds.
D)The placement of atoms and non-bonded electrons.

Question 24

Which of the following molecules are constitutional isomers?

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

Question 25

Which of the following statements about constitutional isomers is true?

A)Constitutional isomers are different molecules having the different molecular formula.
B)Constitutional isomers are different molecules having the same molecular formula.
C)Constitutional isomers are same molecules having the different molecular formula.
D)Constitutional isomers are same molecules having the same molecular formula.

Question 26

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

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

Question 27

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

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

Question 28

How many electrons are around phosphorus in phosphoric acid (H₃PO₄)?

A)6
B)8
C)10
D)12

Question 29

Which of the following compounds has an atom with more than eight valence electrons?

A)H₂CO₃
B)H₂SO₄
C)H₂O
D)HBr

Question 30

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

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 31

Which is more important in each pair of contributing resonance structures?

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

Question 32

Which of the following statements about resonance structures is true?

A)Resonance structures have the same placement of electrons but different arrangement of atoms.
B)Resonance structures have the same placement of atoms but different arrangement of electrons.
C)Resonance structures have the same placement of atoms and the same arrangement of electrons.
D)Resonance structures have different placement of atoms and different arrangement of electrons.

Question 33

Follow the curved arrows to draw the second resonance structure for the ion below.

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

Question 34

How many constitutional isomers are there for a molecule having the molecular formula C₂H₆O?

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

Question 35

How many constitutional isomers are there for a molecule having the molecular formula C₃H₈O?

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

Question 36

What is the approximate value of the H-C-H bond angle in methane,CH₄?

A)90°
B)109.5°
C)120°
D)180°

Question 37

How many different isomers are there for a compound having the molecular formula C₃H₆O?

A)4
B)5
C)6
D)7

Question 38

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

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

Question 39

Which of the following pair does not represent resonance structures?

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

Question 40

Which of the following resonance structures is the least important contributor to the resonance hybrid of the formate anion,HCOO^-?

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

Question 41

Which of the following is the appropriate conversion of the condensed structure,CH₃COCH₃,to a Lewis structure?

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

Question 42

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

A)sp³
B)sp²
C)sp
D)p

Question 43

What is the approximate H-C-O bond angle in formaldehyde,H₂CO?

A)90°
B)109.5°
C)120°
D)180°

Question 44

What is the hybridization for each of the indicated atoms in the following compound?

A)I = sp²; II = sp²; III = sp².
B)I = sp²; II = sp³; III = sp³.
C)I = sp; II = sp²; III = sp³.
D)I = sp²; II = sp²; III = sp³.

Question 45

Which of the following is the appropriate conversion of (CH₃)₂CHCH₂CHClCH₃ to a skeletal structure?

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

Question 46

What is the condensed formula of the compound below?

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

Question 47

What is the molecular geometry around the boron atom in BH₃?

A)Tetrahedral
B)Trigonal Planar
C)Trigonal Pyramidal
D)Linear

Question 48

What is the molecular geometry around the carbon atom in CH₄?

A)Tetrahedral
B)Trigonal Planar
C)Trigonal Pyramidal
D)Linear

Question 49

What is the approximate bond angle for the C-C-N bond in acetonitrile,CH₃CN?

A)90°
B)109.5°
C)120°
D)180°

Question 50

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethylene,H₂C=CH₂?

A)Csp³ + Csp³,and C2p + C2p
B)Csp³ + Csp³,and Csp² + Csp²
C)Csp² + Csp²,and C2p + C2p
D)Csp² + Csp²,and Csp² + Csp²

Question 51

Which of the following is the appropriate conversion of (CH₃)₄C to a skeletal structure?

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

Question 52

Which of the following is the appropriate conversion of (CH₃)₂CHOCH₂CH₂CH₂OH to a skeletal structure?

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

Question 53

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethane,CH₃CH₃?

A)Csp² + H1s
B)Csp³ + H1s
C)C2p + H1s
D)Csp + H1s

Question 54

Which atomic orbitals overlap to form the C-H s bonding molecular orbitals of ethylene,H₂C=CH₂?

A)C2p + H1s
B)Csp + H1s
C)Csp³ + H1s
D)Csp² + H1s

Question 55

Convert the following skeletal structure to a condensed structure.

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

Question 56

What is the approximate C-C-C bond angle in propene,CH₃CH = CH₂?

A)90°
B)109.5°
C)120°
D)180°

Question 57

Determine the geometry around the indicated atom in each species.

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 58

Avobenzone is an active ingredient in some common sunscreens.Which of the following is the correct molecular formula for avobenzone?

A)C₂₂O₂₂O₃
B)C₂₀H₂₂O₃
C)C₂₁H₂₃O₃
D)C₂₀H₂₄O₃

Question 59

In which structure is the hybridization incorrect?

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

Question 60

What is the hybridization of the carbon atom in the methyl cation,(CH₃⁺)?

A)sp³
B)sp²
C)sp
D)p

Question 61

Which of the following molecules has the smallest dipole moment?

A)CO₂
B)HCl
C)H₂O
D)NH₃

Question 62

Which compound contains the most polar bond?

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

Question 63

Rank the following atoms in order of decreasing electronegativity,putting the most electronegative first.

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

Question 64

Which of the following molecules does not have a net dipole moment of zero?

A)CCl₄
B)BF₃
C)CO₂
D)NH₃

Question 65

Which of the following molecules has non-polar covalent bonds?

A)CO₂
B)N₂
C)CCl₄
D)HF

Question 66

When forming molecular orbitals from atomic orbitals,what is the order of increasing C-H bond strength for the following set?

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

Question 67

Rank the following atoms in order of increasing electronegativity,putting the least electronegative first.

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

Question 68

Which of the following covalent bonds has the largest dipole moment?

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

Question 69

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

A)Csp + H1s
B)C2p +H1s
C)Csp³ + H1s
D)Csp² + H1s

Question 70

Which of the following statements about electronegativity and the periodic table is true?

A)Electronegativity decreases across a row of the periodic table.
B)Electronegativity increases down a column of the periodic table.
C)Electronegativity increases across a row of the periodic table.
D)Electronegativity does not change down a column of the periodic table.

Question 71

Which atomic orbitals overlap to form the carbon-carbon s bonding molecular orbital of acetylene,C₂H₂?

A)Csp² + Csp²
B)Csp + Csp
C)Csp³ + Csp³
D)C2p + C2p

Question 72

Which of the following compounds are non-polar?

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

Question 73

Consider compounds which contain both a heteroatom and a double bond.For which compound is no additional Lewis structure possible?

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

Question 74

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

A)CO₂
B)H₂S
C)NH₃
D)H₂O

Question 75

Which of the following molecules has a net dipole moment of zero?

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

Question 76

What is the order of decreasing bond length for a C-C bond composed of the following molecular orbitals?

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

Question 77

Which of the following molecules has polar covalent bonds?

A)MgO
B)NH₃
C)Cl₂
D)NaBr